Document ID: 16563
Interactive: This document offers customized analysis of your Cisco device.
Contents
Introduction
Before You Begin
Conventions
Prerequisites
Components Used
Background Theory
Configuring Basic Frame Relay
Network Diagram
Configurations
debug and show Commands
Configuring Hub and Spoke Frame Relay
Network Diagram
Configurations
show Commands
Connecting from Spoke to Spoke
Configurations
show Commands
Configuring Frame Relay Subinterfaces
Point-to-Point Subinterfaces
show Commands
Hub and Spoke Subinterfaces
show Commands
Configuring Dynamic and Static Mapping for Multipoint Subinterfaces
Network Diagram
Configurations
debug and show Commands
Configuring IP Unnumbered Frame Relay
Network Diagram
Configurations
show Commands
Configuring Frame Relay Backup
Frame Relay Backup over ISDN
Configuration Per DCLI Backup
Hub and Spoke with Dialer Profiles
Configuring Frame Relay Switching
Network Diagram
Configurations
show Commands
Configuring Frame Relay DLCI Prioritization
Implementation Considerations
Network Diagram
Configurations
debug and show Commands
Frame Relay Broadcast Queue
Traffic Shaping
Traffic Shaping Parameters
Generic Traffic Shaping
Frame Relay Traffic Shaping
Commonly Used Frame Relay Commands
show frame-relay pvc
show frame-relay map
Frame Relay and Bridging
Frame Relay and Memory
Troubleshooting Frame Relay
"Serial0 is down, line protocol is down"
"Serial0 is up, line protocol is down"
"Serial0 is up, line protocol is up"
Frame Relay Characteristics
IP Split Horizon Checking
Ping Your Own IP Address on a Multipoint Frame Relay
The Keyword broadcast
Reconfiguring a Subinterface
DLCI Limitations
IP/IPX/AT Address
RIP and IGRP
Keepalive
Serial Interfaces
OSPF and Multipoint
Sources
Related Information
Introduction
Frame Relay is an industry-standard, switched data link layer protocol that handles multiple virtual circuits using High-Level Data Link Control (HDLC) encapsulation between connected devices. In many cases, Frame Relay is more efficient than X.25, the protocol for which it is generally considered a replacement. The following figure illustrates a Frame Relay frame (ANSI T1.618).
Note in the above figure, Q.922 addresses, as presently defined, are two octets and contain a 10-bit data-link connection identifier (DLCI). In some networks Q.922 addresses may optionally be increased to three or four octets.
The "flag" fields delimit the beginning and end of the frame. Following the leading "flag" field are two bytes of address information. Ten bits of these two bytes make up the actual circuit ID (called the DLCI, for data-link connection identifier).
The 10-bit DLCI value is the heart of the Frame Relay header. It identifies the logical connection that is multiplexed into the physical channel. In the basic (that is, not extended by the Local Management Interface [LMI]) mode of addressing, DLCIs have local significance; that is, the end devices at two different ends of a connection may use a different DLCI to refer to that same connection.
Before You Begin
Conventions
For more information on document conventions, see the Cisco Technical Tips Conventions.
Prerequisites
For more information and definitions for the terms used in this document, please refer to the Frame Relay Glossary.
Components Used
This document is not restricted to specific software and hardware versions.
The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If you are working in a live network, ensure that you understand the potential impact of any command before using it.
Background Theory
Frame Relay was originally conceived as a protocol for use over ISDN interfaces. Initial proposals to this effect were submitted to the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) (formerly the Consultative Committee for International Telegraph and Telephone [CCITT]) in 1984. Work on Frame Relay was also undertaken in the ANSI-accredited T1S1 standards committee in the United States.
In 1990, Cisco Systems, StrataCom, Northern Telecom, and Digital Equipment Corporation formed a consortium to focus Frame Relay technology development and accelerate the introduction of inter operable Frame Relay products. They developed a specification conforming to the basic Frame Relay protocol being discussed in T1S1 and ITU-T, but extended it with features that provide additional capabilities for complex internetworking environments. These Frame Relay extensions are referred to collectively as the LMI. This is the "cisco" LMI in the router as opposed to the "ansi" or "q933a" LMI.
Frame Relay provides a packet-switching data communications capability that is used across the interface between user devices (such as routers, bridges, host machines) and network equipment (such as switching nodes). User devices are often referred to as data terminal equipment (DTE), while network equipment that interfaces to DTE is often referred to as data circuit-terminating equipment (DCE). The network providing the Frame Relay interface can be either a carrier-provided public network or a network of privately owned equipment serving a single enterprise.
Frame Relay differs significantly from X.25 in its functionality and format. In particular, Frame Relay is a more streamlined protocol, facilitating higher performance and greater efficiency.
As an interface between user and network equipment, Frame Relay provides a means for statistically multiplexing many logical data conversations (referred to as virtual circuits) over a single physical transmission link. This contrasts with systems that use only time-division-multiplexing (TDM) techniques for supporting multiple data streams. Frame Relay's statistical multiplexing provides more flexible and efficient use of available bandwidth. It can be used without TDM techniques or on top of channels provided by TDM systems.
Another important characteristic of Frame Relay is that it exploits the recent advances in wide-area network (WAN) transmission technology. Earlier WAN protocols, such as X.25, were developed when analog transmission systems and copper media were predominant. These links are much less reliable than the fiber media/digital transmission links available today. Over links such as these, link-layer protocols can forego time-consuming error correction algorithms, leaving these to be performed at higher protocol layers. Greater performance and efficiency is therefore possible without sacrificing data integrity. Frame Relay is designed with this approach in mind. It includes a cyclic redundancy check (CRC) algorithm for detecting corrupted bits (so the data can be discarded), but it does not include any protocol mechanisms for correcting bad data (for example, by retransmitting it at this level of protocol).
Another difference between Frame Relay and X.25 is the absence of explicit, per-virtual-circuit flow control in Frame Relay. Now that many upper-layer protocols are effectively executing their own flow control algorithms, the need for this functionality at the link layer has diminished. Frame Relay, therefore, does not include explicit flow control procedures that duplicate those in higher layers. Instead, very simple congestion notification mechanisms are provided to allow a network to inform a user device that the network resources are close to a congested state. This notification can alert higher-layer protocols that flow control may be needed.
Configuring Basic Frame Relay
Once you have reliable connections to the local Frame Relay switch at both ends of the permanent virtual circuit (PVC), then it is time to start planning the Frame Relay configuration. In this first example, the Local Management Interface (LMI)-type defaults to "cisco" LMI on Spicey. An interface is by default a "multipoint" interface so, frame-relay inverse-arp is on (for point-to-point, there is no Inverse ARP). IP split horizon checking is disabled by default for Frame Relay encapsulation, so routing updates come in and out the same interface. The routers learn the data-link connection identifiers (DLCIs) they need to use from the Frame Relay switch via LMI updates. The routers then Inverse ARP for the remote IP address and create a mapping of local DLCIs and their associated remote IP addresses.
Network Diagram
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... Current configuration : 1705 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 ip address 3.1.3.1 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 140 ! ! router rip network 3.0.0.0 network 124.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1499 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! ! interface Serial1 ip address 3.1.3.2 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 150 ! ! router rip network 3.0.0.0 network 123.0.0.0 ! ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
debug and show Commands
Before issuing debug commands, please see Important Information on Debug Commands.
-
show frame-relay map
-
show frame-relay pvc
-
show frame-relay lmi
-
ping <device name>
-
show ip route
Spicey
Spicey#show frame-relay map
Serial0 (up): ip 3.1.3.2 dlci 140(0x8C,0x20C0), dynamic,
broadcast,, status defined, active
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 83 output pkts 87 in bytes 8144
out bytes 8408 dropped pkts 0 in FECN pkts0
in BECN pkts 0 out FECN pkts 0 out BECN pkts0
in DE pkts 0 out DE pkts 0
out bcast pkts 41 out bcast bytes 3652
pvc create time 01:31:50, last time pvc status changed 01:28:28
Spicey#show frame-relay lmi
LMI Statistics for interface Serial0 (Frame Relay DTE) LMI TYPE = CISCO
Invalid Unnumbered info 0 Invalid Prot Disc 0
Invalid dummy Call Ref 0 Invalid Msg Type 0
Invalid Status Message 0 Invalid Lock Shift 0
Invalid Information ID 0 Invalid Report IE Len 0
Invalid Report Request 0 Invalid Keep IE Len 0
Num Status Enq. Sent 550 Num Status msgs Rcvd 552
Num Update Status Rcvd 0 Num Status Timeouts 0
Spicey#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
Spicey#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.3.0 is directly connected, Serial0
124.0.0.0/24 is subnetted, 1 subnets
C 124.124.124.0 is directly connected, Ethernet0
R 123.0.0.0/8 [120/1] via 3.1.3.2, 00:00:08, Serial0
Prasit
Prasit#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 150(0x96,0x2460), dynamic,
broadcast,, status defined, active
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1
input pkts 87 output pkts 83 in bytes 8408
out bytes 8144 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 38 out bcast bytes 3464
pvc create time 01:34:29, last time pvc status changed 01:28:05
Prasit#show frame-relay lmi
LMI Statistics for interface Serial1 (Frame Relay DTE) LMI TYPE = CISCO
Invalid Unnumbered info 0 Invalid Prot Disc 0
Invalid dummy Call Ref 0 Invalid Msg Type 0
Invalid Status Message 0 Invalid Lock Shift 0
Invalid Information ID 0 Invalid Report IE Len 0
Invalid Report Request 0 Invalid Keep IE Len 0
Num Status Enq. Sent 569 Num Status msgs Rcvd 570
Num Update Status Rcvd 0 Num Status Timeouts 0
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Prasit#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.3.0 is directly connected, Serial1
R 124.0.0.0/8 [120/1] via 3.1.3.1, 00:00:19, Serial1
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Ethernet0
Configuring Hub and Spoke Frame Relay
In this example, the router learns which data-link connection identifiers (DLCIs) it uses from the Frame Relay switch and assigns them to the main interface. Then the router will Inverse ARP for the remote IP address.
Note: You will not be able to ping Prasit's serial IP address from Aton unless you explicitly add in Frame Relay maps on each end. If routing is configured correctly, traffic originating on the LANs should not have a problem. You will be able to ping if you use the Ethernet IP address as the source address in an extended ping.
When frame-relay inverse-arp is enabled, broadcast IP traffic will go out over the connection by default.
Network Diagram
Configurations
|
Spicey |
|---|
spicey#show running-config Building configuration... ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname spicey ! ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 ip address 3.1.3.1 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 130 frame-relay interface-dlci 140 ! ! router rip network 3.0.0.0 network 124.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
prasit#show running-config Building configuration... Current configuration : 1499 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname prasit ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 ip address 3.1.3.2 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 150 ! ! router rip network 3.0.0.0 network 123.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Aton |
|---|
aton#show running-config Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname aton ! ! interface Ethernet0 ip address 122.122.122.1 255.255.255.0 ! interface Serial1 ip address 3.1.3.3 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 160 ! router rip network 3.0.0.0 network 122.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
show Commands
-
show frame-relay map
-
show frame-relay pvc
-
ping <device name>
Spicey
spicey#show frame-relay map
Serial0 (up): ip 3.1.3.2 dlci 140(0x8C,0x20C0), dynamic,
broadcast,, status defined, active
Serial0 (up): ip 3.1.3.3 dlci 130(0x82,0x2020), dynamic,
broadcast,, status defined, active
spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 2 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 130, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 32 output pkts 40 in bytes 3370
out bytes 3928 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 30 out bcast bytes 2888
pvc create time 00:15:46, last time pvc status changed 00:10:42
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 282 output pkts 291 in bytes 25070
out bytes 27876 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 223 out bcast bytes 20884
pvc create time 02:28:36, last time pvc status changed 02:25:14
spicey#
spicey#ping 3.1.3.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
spicey#ping 3.1.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
Prasit
prasit#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 150(0x96,0x2460), dynamic,
broadcast,, status defined, active
prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1
input pkts 311 output pkts 233 in bytes 28562
out bytes 22648 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 162 out bcast bytes 15748
pvc create time 02:31:39, last time pvc status changed 02:25:14
prasit#ping 3.1.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
prasit#ping 3.1.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Aton
aton#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 160(0xA0,0x2800), dynamic,
broadcast,, status defined, active
aton#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 160, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1
input pkts 35 output pkts 32 in bytes 3758
out bytes 3366 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 27 out bcast bytes 2846
pvc create time 00:10:53, last time pvc status changed 00:10:53
aton#ping 3.1.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
aton#ping 3.1.3.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Connecting from Spoke to Spoke
You cannot ping from one spoke to another spoke in a hub and spoke configuration using multipoint interfaces because there is no mapping for the other spokes' IP addresses. Only the hub's address is learned via the Inverse Address Resolution Protocol (IARP). If you configure a static map using the frame-relay map command for the IP address of a remote spoke to use the local data link connection identifier (DLCI), you can ping the addresses of other spokes.
Configurations
|
Prasit |
|---|
prasit#show running-config interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial ip address 3.1.3.2 255.255.255.0 encapsulation frame-relay frame-relay map ip 3.1.3.3 150 frame-relay interface-dlci 150 |
show Commands
-
show frame-relay map
-
ping <device name>
-
show running-config
Prasit
prasit#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 150(0x96,0x2460), dynamic,
broadcast,, status defined, active
Serial1 (up): ip 3.1.3.3 dlci 150(0x96,0x2460), static,
CISCO, status defined, active
prasit#ping 3.1.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.1.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 68/70/80 ms
prasit#ping 122.122.122.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 122.122.122.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 64/67/76 ms
Aton
aton#show running-config
interface Ethernet0
ip address 122.122.122.1 255.255.255.0
!
interface Serial1
ip address 3.1.3.3 255.255.255.0
no ip directed-broadcast
encapsulation frame-relay
frame-relay map ip 3.1.3.2 160
frame-relay interface-dlci 160
aton#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 160(0xA0,0x2800), dynamic,
broadcast,, status defined, active
Serial1 (up): ip 3.1.3.2 dlci 160(0xA0,0x2800), static,
CISCO, status defined, active
aton#ping 3.1.3.2
Type escape sequence to abort
Sending 5, 100-byte ICMP Echos to 3.1.3.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 68/68/68 ms
aton#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 64/67/80 ms
Configuring Frame Relay Subinterfaces
Frame Relay subinterfaces provide a mechanism for supporting partially meshed Frame Relay networks. Most protocols assume transitivity on a logical network; that is, if station A can talk to station B, and station B can talk to station C, then station A should be able to talk to station C directly. Transitivity is true on LANs, but not on Frame Relay networks unless A is directly connected to C.
Additionally, certain protocols, such as AppleTalk and transparent bridging, cannot be supported on partially meshed networks because they require "split horizon" in which a packet received on an interface cannot be transmitted out the same interface even if the packet is received and transmitted on different virtual circuits.
Configuring Frame Relay subinterfaces ensures that a single physical interface is treated as multiple virtual interfaces. This capability allows us to overcome split horizon rules. Packets received on one virtual interface can now be forwarded out another virtual interface, even if they are configured on the same physical interface.
Subinterfaces address the limitations of Frame Relay networks by providing a way to subdivide a partially meshed Frame Relay network into a number of smaller, fully meshed (or point-to-point) subnetworks. Each subnetwork is assigned its own network number and appears to the protocols as if it is reachable through a separate interface. (Note that point-to-point subinterfaces can be unnumbered for use with IP, reducing the addressing burden that might otherwise result).
Point-to-Point Subinterfaces
Network Diagram
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... Current configuration : 1338 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! enable password ww ! ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip address 3.1.3.1 255.255.255.0 frame-relay interface-dlci 140 ! ! router igrp 2 network 3.0.0.0 network 124.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1234 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 point-to-point ip address 3.1.3.2 255.255.255.0 frame-relay interface-dlci 150 ! router igrp 2 network 3.0.0.0 network 123.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
show Commands
-
show frame-relay map
-
show frame-relay pvc
Spicey
Spicey#show frame-relay map
Serial0.1 (up): point-to-point dlci, dlci 140(0x8C,0x20C0), broadcast
status defined, active
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0.1
input pkts 193 output pkts 175 in bytes 20450
out bytes 16340 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 50 out bcast bytes 3786
pvc create time 01:11:27, last time pvc status changed 00:42:32
Spicey#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Prasit
Prasit#show frame-relay map
Serial1.1 (up): point-to-point dlci, dlci 150(0x96,0x2460), broadcast
status defined, active
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1.1
input pkts 74 output pkts 89 in bytes 7210
out bytes 10963 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 24 out bcast bytes 4203
pvc create time 00:12:25, last time pvc status changed 00:12:25
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Hub and Spoke Subinterfaces
The following hub and spoke sample configuration shows two point-to-point subinterfaces and uses dynamic address resolution on one remote site. Each subinterface is provided with an individual protocol address and subnetmask, and the interface-dlci command associates the subinterface with a specified data-link connection identifier (DLCI). Addresses of remote destinations for each point-to-point subinterface are not resolved since they are point-to-point and traffic must be sent to the peer at the other end. The remote end (Aton) uses Inverse ARP for its mapping and the main hub responds accordingly with the IP address of the subinterface. This occurs because Frame Relay Inverse ARP is on by default for multipoint interfaces.
Network Diagram
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip address 4.0.1.1 255.255.255.0 frame-relay interface-dlci 140 ! interface Serial0.2 point-to-point ip address 3.1.3.1 255.255.255.0 frame-relay interface-dlci 130 ! router igrp 2 network 3.0.0.0 network 4.0.0.0 network 124.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 point-to-point ip address 4.0.1.2 255.255.255.0 frame-relay interface-dlci 150 ! router igrp 2 network 4.0.0.0 network 123.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Aton |
|---|
Aton#show running-config Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime ! hostname Aton ! ! ! interface Ethernet0 ip address 122.122.122.1 255.255.255.0 ! interface Serial1 ip address 3.1.3.3 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 160 ! router igrp 2 network 3.0.0.0 network 122.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
show Commands
-
show frame-relay map
-
show frame-relay pvc
Spicey
Spicey#show frame-relay map
Serial0.2 (up): point-to-point dlci, dlci 130(0x82,0x2020), broadcast
status defined, active
Serial0.1 (up): point-to-point dlci, dlci 140(0x8C,0x20C0), broadcast
status defined, active
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 2 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 130, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0.2
input pkts 11 output pkts 22 in bytes 1080
out bytes 5128 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 17 out bcast bytes 4608
pvc create time 00:06:36, last time pvc status changed 00:06:36
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0.1
input pkts 33 output pkts 28 in bytes 3967
out bytes 5445 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 17 out bcast bytes 4608
pvc create time 00:06:38, last time pvc status changed 00:06:38
Spicey#ping 122.122.122.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 122.122.122.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
Spicey#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Prasit
Prasit#show frame-relay map
Serial1.1 (up): point-to-point dlci, dlci 150(0x96,0x2460), broadcast
status defined, active
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1.1
input pkts 45 output pkts 48 in bytes 8632
out bytes 6661 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 31 out bcast bytes 5573
pvc create time 00:12:16, last time pvc status changed 00:06:23
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Aton
Aton#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 160(0xA0,0x2800), dynamic,
broadcast,, status defined, active
Aton#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 160, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1
input pkts 699 output pkts 634 in bytes 81290
out bytes 67008 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 528 out bcast bytes 56074
pvc create time 05:46:14, last time pvc status changed 00:05:57
Aton#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Configuring Dynamic and Static Mapping for Multipoint Subinterfaces
Dynamic address mapping uses Frame Relay Inverse ARP to request the next hop protocol address for a specific connection, given a data-link connection identifier (DLCI). Responses to Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server; the table is then used to supply the next hop protocol address or the DLCI for outgoing traffic.
Since the physical interface is now configured as multiple subinterfaces, you must provide information that distinguishes a subinterface from the physical interface and associates a specific subinterface with a specific DLCI.
Inverse ARP is enabled by default for all protocols it supports, but can be disabled for specific protocol-DLCI pairs. As a result, you can use dynamic mapping for some protocols and static mapping for other protocols on the same DLCI. You can explicitly disable Inverse ARP for a protocol-DLCI pair if you know the protocol is not supported on the other end of the connection. Because Inverse ARP is enabled by default for all protocols that it supports, no additional command is required to configure dynamic address mapping on a subinterface. A static map links a specified next hop protocol address to a specified DLCI. Static mapping removes the need for Inverse ARP requests; when you supply a static map, Inverse ARP is automatically disabled for the specified protocol on the specified DLCI. You must use static mapping if the router at the other end either does not support Inverse ARP at all or does not support Inverse ARP for a specific protocol that you want to use over Frame Relay.
Network Diagram
We've already seen how to configure a Cisco router to do Inverse ARP. The following example shows how to configure static maps in case you need them for multipoint interfaces or subinterfaces:
Configurations
|
Aton |
|---|
Aton#show running-config Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Aton ! ! interface Ethernet0 ip address 122.122.122.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 multipoint ip address 4.0.1.3 255.255.255.0 frame-relay map ip 4.0.1.1 160 broadcast ! router igrp 2 network 4.0.0.0 network 122.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Spicey |
|---|
Spicey#show running-config Building configuration...Current configuration : 1652 bytes! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 ip address 4.0.1.1 255.255.255.0 encapsulation frame-relay frame-relay map ip 4.0.1.2 140 broadcast frame-relay map ip 4.0.1.3 130 broadcast ! router igrp 2 network 4.0.0.0 network 124.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1162 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 multipoint ip address 4.0.1.2 255.255.255.0 frame-relay map ip 4.0.1.1 150 broadcast ! router igrp 2 network 4.0.0.0 network 123.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
debug and show Commands
-
show frame-relay map
-
show frame-relay pvc
Aton
Aton#show frame-relay map
Serial1.1 (up): ip 4.0.1.1 dlci 160(0xA0,0x2800), static, broadcast,
CISCO, status defined, active
Aton#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 160, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1.1
input pkts 16 output pkts 9 in bytes 3342
out bytes 450 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 9 out bcast bytes 450
pvc create time 00:10:02, last time pvc status changed 00:10:02
Aton#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
Spicey
Spicey#show frame-relay map
Serial0 (up): ip 4.0.1.2 dlci 140(0x8C,0x20C0), static, broadcast,
CISCO, status defined, active
Serial0 (up): ip 4.0.1.3 dlci 130(0x82,0x2020), static, broadcast,
CISCO, status defined, active
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 2 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 130, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 9 output pkts 48 in bytes 434
out bytes 11045 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 48 out bcast bytes 11045
pvc create time 00:36:25, last time pvc status changed 00:36:15
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 17 output pkts 26 in bytes 1390
out bytes 4195 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 16 out bcast bytes 3155
pvc create time 00:08:39, last time pvc status changed 00:08:39
Spicey#ping 122.122.122.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 122.122.122.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
Spicey#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36
Prasit
Prasit#show frame-relay map
Serial1.1 (up): ip 4.0.1.1 dlci 150(0x96,0x2460), static,
broadcast,
CISCO, status defined, active
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1.1
input pkts 28 output pkts 19 in bytes 4753
out bytes 1490 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 9 out bcast bytes 450
pvc create time 00:11:00, last time pvc status changed 00:11:00
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
For more information on these commands, please see Frame Relay Commands.
Configuring IP Unnumbered Frame Relay
If you do not have the IP address space to use many subinterfaces, you can use IP unnumbered on each subinterface. If this is the case, you need to use static routes or dynamic routing so that your traffic is routed as usual, and you must use point-to-point subinterfaces.
Network Diagram
The example below illustrates this:
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... Current configuration : 1674 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip unnumbered Ethernet0 frame-relay interface-dlci 140 ! router igrp 2 network 124.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1188 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 point-to-point ip unnumbered Ethernet0 frame-relay interface-dlci 150 ! router igrp 2 network 123.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
show Commands
-
show frame-relay map
-
show frame-relay pvc
Spicey
Spicey#show frame-relay map
Serial0.1 (up): point-to-point dlci, dlci 140(0x8C,0x20C0), broadcast
status defined, active
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial0.1
input pkts 23 output pkts 24 in bytes 3391
out bytes 4952 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 14 out bcast bytes 3912
pvc create time 00:04:47, last time pvc status changed 00:04:47
Spicey#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
124.0.0.0/24 is subnetted, 1 subnets
C 124.124.124.0 is directly connected, Ethernet0
123.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
I 123.0.0.0/8 [100/8576] via 123.123.123.1, 00:01:11, Serial0.1
I 123.123.123.0/32 [100/8576] via 123.123.123.1, 00:01:11,
Serial0.1
Spicey#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Prasit
Prasit#show frame-relay map
Serial1.1 (up): point-to-point dlci, dlci 150(0x96,0x2460), broadcast
status defined, active
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1.1
input pkts 24 output pkts 52 in bytes 4952
out bytes 10892 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 41 out bcast bytes 9788
pvc create time 00:10:54, last time pvc status changed 00:03:51
Prasit#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
124.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
I 124.0.0.0/8 [100/8576] via 124.124.124.1, 00:00:18, Serial1.1
I 124.124.124.0/32 [100/8576] via 124.124.124.1, 00:00:18,
Serial1.1
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Ethernet0
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/120/436 ms
Configuring Frame Relay Backup
Frame Relay Backup over ISDN
You may want to back up Frame Relay circuits using ISDN. There are several ways to do this. The first, and probably the best, is to use floating static routes that route traffic to a Basic Rate Interface (BRI) IP address and use an appropriate routing metric. You can also use a backup interface on the main interface or on a per-data-link connection identifier (DLCI) basis. It may not help much to back up the main interface because you could lose permanent virtual circuits (PVCs) without the main interface going down. Remember, the protocol is being exchanged with the local Frame Relay switch, not the remote router.
Configurations
|
Router 1 |
|---|
ROUTER1# ! hostname ROUTER1 ! username ROUTER2 password same isdn switch-type basic-dms100 ! interface Ethernet 0 ip address 172.16.15.1 255.255.255.248 ! interface serial 0 ip address 172.16.24.129 255.255.255.128 encapsulation FRAME-RELAY ! interface BRI0 description Backup ISDN for frame-relay ip address 172.16.12.1 255.255.255.128 encapsulation PPP dialer idle-timeout 240 dialer wait-for-carrier-time 60 dialer map IP 172.16.12.2 name ROUTER2 broadcast 7086639706 ppp authentication chap dialer-group 1 isdn spid1 0127280320 2728032 isdn spid2 0127295120 2729512 ! router igrp 1 network 172.16.0.0 ! ip route 172.16.15.16 255.255.255.248 172.16.12.2 150 !--- Floating static route. ! access-list 101 deny igrp 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255 access-list 101 permit ip 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255 dialer-list 1 LIST 101 ! |
|
Router 2 |
|---|
ROUTER2# ! hostname ROUTER2 ! username ROUTER1 password same isdn switch-type basic-dms100 ! interface Ethernet 0 ip address 172.16.15.17 255.255.255.248 ! interface Serial 0 ip address 172.16.24.130 255.255.255.128 encapsulation FRAME-RELAY ! interface BRI0 description ISDN backup interface for frame-relay ip address 172.16.12.2 255.255.255.128 encapsulation PPP dialer idle-timeout 240 dialer map IP 172.16.12.1 name ROUTER1 broadcast ppp authentication chap pulse-time 1 dialer-group 1 isdn spid1 0191933333 4445555 isdn spid2 0191933334 4445556 ! router igrp 1 network 172.16.0.0 ! ip route 172.16.15.0 255.255.255.248 172.16.12.1 150 !--- Floating static route. ! access-list 101 deny igrp 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255 access-list 101 permit ip 0.0.0.0 255.255.255.255 162.27.9.0 0.0.0.255 dialer-list 1 LIST 101 ! |
show Commands
To verify if the ISDN is working, use the following debug commands. Before issuing debug commands, please see Important Information on Debug Commands.
-
debug isdn q931
-
debug ppp neg
-
debug ppp auth
Try to make an ISDN call from the calling side to the central side without the backup commands. If this is successful, add the backup commands to the calling side.
Note: To test the backup, do not use the shutdown command on the serial interface but emulate a real serial line problem by pulling out the cable from the serial line.
Configuration Per DCLI Backup
Now let's assume that Spicey is the central side and that Prasit is the side making connections to the central side (Spicey). Take care that you only add the backup commands to the side that is calling the central side.
Note: Backup load is not supported on subinterfaces. As we do not track traffic levels on subinterfaces, no load is calculated.
Network Diagram
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... Current configuration : 1438 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! ! username Prasit password 0 cisco ! ! isdn switch-type basic-net3 ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip address 4.0.1.1 255.255.255.0 frame-relay interface-dlci 140 ! interface BRI0 ip address 3.1.6.1 255.255.255.0 encapsulation ppp dialer map ip 3.1.6.2 name Prasit broadcast dialer-group 1 isdn switch-type basic-net3 no peer default ip address no cdp enable ppp authentication chap ! router igrp 2 network 3.0.0.0 network 4.0.0.0 network 124.0.0.0 ! ip classless ip route 123.123.123.0 255.255.255.0 3.1.6.2 250 ! access-list 101 deny igrp any any access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1245 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! username Spicey password 0 cisco ! ! isdn switch-type basic-net3 ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 point-to-point backup delay 5 10 backup interface BRI0 ip address 4.0.1.2 255.255.255.0 frame-relay interface-dlci 150 ! interface BRI0 ip address 3.1.6.2 255.255.255.0 encapsulation ppp dialer map ip 3.1.6.1 name Spicey broadcast 6106 dialer-group 1 isdn switch-type basic-net3 ppp authentication chap ! router igrp 2 network 3.0.0.0 network 4.0.0.0 network 123.0.0.0 ! ip route 124.124.124.0 255.255.255.0 3.1.6.1 250 ! access-list 101 deny igrp any any access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
show Commands
-
show frame-relay map
-
show ip route
-
show isdn history
-
show isdn status
-
show interface bri 0
-
show isdn active
Spicey
Spicey#show frame-relay map
Serial0.2 (up): point-to-point dlci, dlci 130(0x82,0x2020), broadcast
status defined, active
Serial0.1 (up): point-to-point dlci, dlci 140(0x8C,0x20C0), broadcast
status defined, active
Spicey#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
3.0.0.0/24 is subnetted, 2 subnets C
3.1.3.0 is directly connected, Serial0.2 C
3.1.6.0 is directly connected, BRI0
4.0.0.0/24 is subnetted, 1 subnets C
4.0.1.0 is directly connected, Serial0.1
124.0.0.0/24 is subnetted, 1 subnets C
124.124.124.0 is directly connected, Ethernet0
123.0.0.0/8 is variably subnetted, 2 subnets, 2 masks I
123.0.0.0/8 [100/8576] via 4.0.1.2, 00:00:00, Serial0.1 S
123.123.123.0/24 [250/0] via 3.1.6.2 I
122.0.0.0/8 [100/8576] via 3.1.3.3, 00:00:37, Serial0.2
Spicey#
*Mar 1 00:59:12.527: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
*Mar 1 00:59:13.983: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
*Mar 1 00:59:18.547: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 6105 Prasit
Spicey#show isdn history
--------------------------------------------------------------------------------
ISDN CALL HISTORY
--------------------------------------------------------------------------------
Call History contains all active calls, and a maximum of 100 inactive calls.
Inactive call data will be retained for a maximum of 15 minutes.
--------------------------------------------------------------------------------
Call Calling Called Remote Seconds Seconds Seconds
Charges
Type Number Number Name Used Left Idle Units/Currency
--------------------------------------------------------------------------------
In 6105 6106 Prasit 31 90 29
--------------------------------------------------------------------------------
Spicey#
*Mar 1 01:01:14.547: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
from 6105 Prasit, call lasted 122 seconds
*Mar 1 01:01:14.663: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:01:15.663: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to down
Prasit
Prasit#show frame-relay map
Serial1.1 (up): point-to-point dlci, dlci 150(0x96,0x2460), broadcast
status defined, active
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
Prasit#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
I 3.0.0.0/8 [100/10476] via 4.0.1.1, 00:00:55, Serial1.1
4.0.0.0/24 is subnetted, 1 subnets
C 4.0.1.0 is directly connected, Serial1.1
124.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S 124.124.124.0/24 [250/0] via 3.1.6.1
I 124.0.0.0/8 [100/8576] via 4.0.1.1, 00:00:55, Serial1.1
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Ethernet0
I 122.0.0.0/8 [100/10576] via 4.0.1.1, 00:00:55, Serial1.1
The serial line goes down.
Prasit#
*Mar 1 01:23:50.531: %LINK-3-UPDOWN: Interface Serial1, changed state to down
*Mar 1 01:23:51.531: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1, changed state to down
*Mar 1 01:23:53.775: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:23:53.791: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
*Mar 1 01:23:53.827: %LINK-3-UPDOWN: Interface BRI0, changed state to up
*Mar 1 01:23:57.931: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 64 changed to up
Prasit#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF,IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.6.0 is directly connected, BRI0
124.0.0.0/24 is subnetted, 1 subnets
S 124.124.124.0 [250/0] via 3.1.6.1
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Ethernet0
Prasit#show isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0 interface
dsl 0, interface ISDN Switchtype = basic-net3
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 64, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!
*Mar 1 01:25:47.383: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 36/36/36 ms
Prasit#
*Mar 1 01:25:48.475: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
Prasit#
*Mar 1 01:25:53.407: %ISDN-6-CONNECT: Interface BRI0:1 is now connected
to 6106 Spicey
Prasit#show isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0 interface
dsl 0, interface ISDN Switchtype = basic-net3
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 64, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
1 Active Layer 3 Call(s)
CCB:callid=8003, sapi=0, ces=1, B-chan=1, calltype=DATA
Active dsl 0 CCBs = 1
The Free Channel Mask: 0x80000002
Total Allocated ISDN CCBs = 1
Prasit#show isdn active
--------------------------------------------------------------------------------
ISDN ACTIVE CALLS
--------------------------------------------------------------------------------
Call Calling Called Remote Seconds Seconds Seconds Charges
Type Number Number Name Used Left Idle Units/Currency
--------------------------------------------------------------------------------
Out 6106 Spicey 21 100 19 0
--------------------------------------------------------------------------------
Prasit#
*Mar 1 01:27:49.027: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
from 6106 Spicey, call lasted 121 seconds
*Mar 1 01:27:49.131: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:27:50.131: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to down
*Mar 1 01:28:09.215: %LINK-3-UPDOWN: Interface Serial1, changed state to up
*Mar 1 01:28:10.215: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1, changed state to up
*Mar 1 01:28:30.043: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BRI0,
TEI 64 changed to down
*Mar 1 01:28:30.047: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0, TEI
64 changed to down
*Mar 1 01:28:30.371: %LINK-5-CHANGED: Interface BRI0, changed state to standby mode
*Mar 1 01:28:30.387: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:28:30.403: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
Prasit#
The serial connection is back again..
Prasit#show isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0 interface
dsl 0, interface ISDN Switchtype = basic-net3
Layer 1 Status:
DEACTIVATED
Layer 2 Status:
Layer 2 NOT Activated
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
Prasit#show interface bri 0
BRI0 is standby mode, line protocol is down
Hardware is BRI
Internet address is 3.1.6.2/24
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Last input 00:01:00, output 00:01:00, output hang never
Last clearing of "show interface" counters 01:28:16
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
128 packets input, 601 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
132 packets output, 687 bytes, 0 underruns
0 output errors, 0 collisions, 10 interface resets
0 output buffer failures, 0 output buffers swapped out
14 carrier transitions
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Hub and Spoke with Dialer Profiles
Here is an example of a hub and spoke per DLCI backup configuration. The spoke routers are calling the hub router. As you can see, we allow only one B channel per side by using the max-link option on the dialer pool on the hub side.
Note: Backup load is not supported on subinterfaces. As we do not track traffic levels on subinterfaces, no load is calculated.
Network Diagram
Configurations
|
Aton |
|---|
Aton#show running-config Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Aton ! ! username Spicey password 0 cisco ! isdn switch-type basic-net3 ! ! ! interface Ethernet0 ip address 122.122.122.1 255.255.255.0 ! ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 point-to-point ip address 3.1.3.3 255.255.255.0 backup delay 5 10 backup interface BRI0 frame-relay interface-dlci 160 ! interface BRI0 ip address 155.155.155.3 255.255.255.0 encapsulation ppp no ip route-cache no ip mroute-cache dialer map ip 155.155.155.2 name Spicey broadcast 6106 dialer-group 1 isdn switch-type basic-net3 ppp authentication chap ! router igrp 2 network 3.0.0.0 network 122.0.0.0 network 155.155.0.0 ! ip route 124.124.124.0 255.255.255.0 155.155.155.2 250 ! access-list 101 deny igrp any any access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Spicey |
|---|
Spicey#show running-config Building configuration... Current configuration : 1887 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! username Prasit password 0 cisco username Aton password 0 cisco ! isdn switch-type basic-net3 ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip address 4.0.1.1 255.255.255.0 frame-relay interface-dlci 140 ! interface Serial0.2 point-to-point ip address 3.1.3.1 255.255.255.0 frame-relay interface-dlci 130 ! interface BRI0 no ip address encapsulation ppp no ip route-cache no ip mroute-cache dialer pool-member 2 max-link 1 dialer pool-member 1 max-link 1 isdn switch-type basic-net3 no peer default ip address no cdp enable ppp authentication chap ! interface Dialer1 ip address 160.160.160.1 255.255.255.0 encapsulation ppp no ip route-cache no ip mroute-cache dialer pool 1 dialer remote-name Prasit dialer-group 1 ppp authentication chap ! interface Dialer2 ip address 155.155.155.2 255.255.255.0 encapsulation ppp no ip route-cache no ip mroute-cache dialer pool 2 dialer remote-name Aton dialer-group 1 ppp authentication chap ! router igrp 2 network 3.0.0.0 network 4.0.0.0 network 124.0.0.0 network 155.155.0.0 network 160.160.0.0 ! access-list 101 deny igrp any any access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1267 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! username Spicey password 0 cisco ! isdn switch-type basic-net3 ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 no ip address encapsulation frame-relay ! interface Serial1.1 point-to-point backup delay 5 10 backup interface BRI0 ip address 4.0.1.2 255.255.255.0 frame-relay interface-dlci 150 ! interface BRI0 ip address 160.160.160.2 255.255.255.0 encapsulation ppp dialer map ip 160.160.160.1 name Spicey broadcast 6106 dialer-group 1 isdn switch-type basic-net3 ppp authentication chap ! router igrp 2 network 4.0.0.0 network 123.0.0.0 network 160.160.0.0 ! ip route 124.124.124.0 255.255.255.0 160.160.160.1 250 ! access-list 101 deny igrp any any access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
show Commands
-
show frame-relay map
-
show ip route
-
show frame map
-
show frame-relay pvc
Aton
Aton#show frame-relay map
Serial1.1 (up): point-to-point dlci, dlci 160(0xA0,0x2800), broadcast
status defined, active
Aton#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Aton#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
U - per-user static route, o - ODR, P - periodic downloaded static route
T - traffic engineered route
Gateway of last resort is not set
I 155.155.0.0/16 [100/182571] via 3.1.3.1, Serial1.1
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.3.0 is directly connected, Serial1.1
I 4.0.0.0/8 [100/10476] via 3.1.3.1, Serial1.1
I 160.160.0.0/16 [100/182571] via 3.1.3.1, Serial1.1
124.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S 124.124.124.0/24 [250/0] via 155.155.155.2
I 124.0.0.0/8 [100/8576] via 3.1.3.1, Serial1.1
I 123.0.0.0/8 [100/10576] via 3.1.3.1, Serial1.1
122.0.0.0/24 is subnetted, 1 subnets
C 122.122.122.0 is directly connected, Ethernet0
Aton#
Serial 1 is going down.
Aton#
01:16:33: %LINK-3-UPDOWN: Interface Serial1, changed state to down
01:16:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed state to down
01:16:37: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
01:16:37: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
01:16:37: %LINK-3-UPDOWN: Interface BRI0, changed state to up
01:16:41: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 64 changed to up
Aton#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
U - per-user static route, o - ODR, P - periodic downloaded static route
T - traffic engineered route
Gateway of last resort is not set
155.155.0.0/24 is subnetted, 1 subnets
C 155.155.155.0 is directly connected, BRI0
124.0.0.0/24 is subnetted, 1 subnets
S 124.124.124.0 [250/0] via 155.155.155.2
122.0.0.0/24 is subnetted, 1 subnets
C 122.122.122.0 is directly connected, Ethernet0
Aton#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
01:21:33: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 36/36/36 ms
Aton#
01:21:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,
changed state to up
01:21:39: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 6106
Spicey
Aton#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/123/296 ms
Aton#
Serial 1 becomes active again
Aton#
01:24:02: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 6106
Spicey, call lasted 149 seconds
01:24:02: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
01:24:03: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,
changed state to down
Aton#show frame map
Serial1.1 (down): point-to-point dlci, dlci 160(0xA0,0x2800), broadcast
status deleted
Aton#
01:26:35: %LINK-3-UPDOWN: Interface Serial1, changed state to up
01:26:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,
changed state to up
01:26:56: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BRI0, TEI 64 changed
to down
01:26:56: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0, TEI 64 changed
to down
01:26:56: %LINK-5-CHANGED: Interface BRI0, changed state to standby mode
01:26:56: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
01:26:56: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
Aton#show frame map
Serial1.1 (up): point-to-point dlci, dlci 160(0xA0,0x2800), broadcast
status defined, active
Aton#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Aton#ping 124.124.124.1
Aton#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 160, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1.1
input pkts 60 output pkts 69 in bytes 9694
out bytes 10811 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 44 out bcast bytes 7565
pvc create time 01:28:35, last time pvc status changed 00:02:19
Spicey
Spicey#show frame-relay map
Serial0.1 (up): point-to-point dlci, dlci 140(0x8C,0x20C0), broadcast
status defined, active
Serial0.2 (up): point-to-point dlci, dlci 130(0x82,0x2020), broadcast
status defined, active
Spicey#ping 122.122.122.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 122.122.122.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
Spicey#ping 123.123.123.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 123.123.123.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Spicey#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
155.155.0.0/24 is subnetted, 1 subnets
C 155.155.155.0 is directly connected, Dialer2
3.0.0.0/24 is subnetted, 1 subnets
C 3.1.3.0 is directly connected, Serial0.2
4.0.0.0/24 is subnetted, 1 subnets
C 4.0.1.0 is directly connected, Serial0.1
160.160.0.0/24 is subnetted, 1 subnets
C 160.160.160.0 is directly connected, Dialer1
124.0.0.0/24 is subnetted, 1 subnets
C 124.124.124.0 is directly connected, Ethernet0
I 123.0.0.0/8 [100/8576] via 4.0.1.2, 00:00:55, Serial0.1
I 122.0.0.0/8 [100/8576] via 3.1.3.3, 00:00:35, Serial0.2
Both serial lines from the calling sides are going down.
Spicey#
*Mar 1 01:21:30.171: %LINK-3-UPDOWN: Interface BRI0:1, changed state toup
*Mar 1 01:21:30.627: %DIALER-6-BIND: Interface BR0:1 bound to profile Di2
*Mar 1 01:21:31.647: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
*Mar 1 01:21:36.191: %ISDN-6-CONNECT: Interface BRI0:1 is now connected
to 6104 Aton
*Mar 1 01:21:40.923: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up
*Mar 1 01:21:41.359: %DIALER-6-BIND: Interface BR0:2 bound to profile Di1
*Mar 1 01:21:42.383: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:2, changed state to up
*Mar 1 01:21:46.943: %ISDN-6-CONNECT: Interface BRI0:2 is now connected
to 6105 Prasit
*Mar 1 01:23:59.819: %DIALER-6-UNBIND: Interface BR0:1 unbound from
profile Di2
*Mar 1 01:23:59.831: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected
from 6104 Aton, call lasted 149 seconds
*Mar 1 01:23:59.927: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:24:00.923: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to down
*Mar 1 01:24:03.015: %DIALER-6-UNBIND: Interface BR0:2 unbound from
profile Di1
*Mar 1 01:24:03.023: %ISDN-6-DISCONNECT: Interface BRI0:2 disconnected
from 6105 Prasit, call lasted 142 seconds
*Mar 1 01:24:03.107: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
*Mar 1 01:24:04.107: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:2, changed state to down
Spicey#show frame map
Serial0.1 (down): point-to-point dlci, dlci 140(0x8C,0x20C0), broadcast
status defined, inactive
Serial0.2 (down): point-to-point dlci, dlci 130(0x82,0x2020), broadcast
status defined, inactive
Spicey#
Both serial lines are available again.
Spicey#show frame pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 2 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 130, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial0.2
input pkts 54 output pkts 61 in bytes 7014
out bytes 9975 dropped pkts 3 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 40 out bcast bytes 7803
pvc create time 01:28:14, last time pvc status changed 00:02:38
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial0.1
input pkts 56 output pkts 60 in bytes 7604
out bytes 10114 dropped pkts 2 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 39 out bcast bytes 7928
pvc create time 01:28:15, last time pvc status changed 00:02:29
Prasit
Prasit#show frame-relay map
Serial1.1 (up): point-to-point dlci, dlci 150(0x96,0x2460), broadcast
status defined, active
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
Prasit#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
I 155.155.0.0/16 [100/182571] via 4.0.1.1, 00:00:41, Serial1.1
I 3.0.0.0/8 [100/10476] via 4.0.1.1, 00:00:41, Serial1.1
4.0.0.0/24 is subnetted, 1 subnets
C 4.0.1.0 is directly connected, Serial1.1
I 160.160.0.0/16 [100/182571] via 4.0.1.1, 00:00:41, Serial1.1
124.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
S 124.124.124.0/24 [250/0] via 160.160.160.1
I 124.0.0.0/8 [100/8576] via 4.0.1.1, 00:00:41, Serial1.1
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Ethernet0
I 122.0.0.0/8 [100/10576] via 4.0.1.1, 00:00:42, Serial1.1
Prasit#
Serial 1 goes down.
Prasit#
*Mar 1 01:16:08.287: %LINK-3-UPDOWN: Interface Serial1, changed state to down
*Mar 1 01:16:09.287: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1, changed state to down
*Mar 1 01:16:11.803: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:16:11.819: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
*Mar 1 01:16:11.855: %LINK-3-UPDOWN: Interface BRI0, changed state to up
*Mar 1 01:16:15.967: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI
64 changed to up
Prasit#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
160.160.0.0/24 is subnetted, 1 subnets
C 160.160.160.0 is directly connected, BRI0
124.0.0.0/24 is subnetted, 1 subnets
S 124.124.124.0 [250/0] via 160.160.160.1
123.0.0.0/24 is subnetted, 1 subnets
C 123.123.123.0 is directly connected, Ethernet0
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
*Mar 1 01:21:38.967: %LINK-3-UPDOWN: Interface BRI0:1, changed state to
up.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 36/36/36 ms
Prasit#
*Mar 1 01:21:40.063: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
*Mar 1 01:21:44.991: %ISDN-6-CONNECT: Interface BRI0:1 is now connected
to 6106 Spicey
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
Prasit#
Serial 1 becomes active again.
Prasit#
*Mar 1 01:26:40.579: %LINK-3-UPDOWN: Interface Serial1, changed state to up
*Mar 1 01:26:41.579: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Serial1, changed state to up
*Mar 1 01:27:01.051: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BRI0,
TEI 64 changed to down
*Mar 1 01:27:01.055: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0, TEI
64 changed to down
*Mar 1 01:27:01.363: %LINK-5-CHANGED: Interface BRI0, changed state to standby mode
*Mar 1 01:27:01.379: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down
*Mar 1 01:27:01.395: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down
Prasit#show frame map
Serial1.1 (up): point-to-point dlci, dlci 150(0x96,0x2460), broadcast
status defined, active
Prasit#ping 124.124.124.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 124.124.124.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/116/432 ms
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1.1
input pkts 58 output pkts 66 in bytes 9727
out bytes 10022 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 46 out bcast bytes 7942
pvc create time 01:27:37, last time pvc status changed 00:01:59
Configuring Frame Relay Switching
Frame Relay switching is a means of switching packets based on the data-link connection identifier (DLCI). We can look on this as the Frame Relay equivalent of a Media Access Control (MAC) address. You perform switching by configuring your Cisco router or access server into a Frame Relay network. There are two parts to a Frame Relay network:
-
Frame Relay data terminal equipment (DTE) - the router or access server.
-
Frame Relay data circuit-terminating equipment (DCE) switch.
Note: In Cisco IOS Software release 12.1(2)T and later, the frame route command has been replaced by the connect command.
Let's look at a sample configuration. In the configuration below, we are using the router America as a Frame Relay switch. We are using Spicey as a hub router and Prasit and Aton as spoke routers. We have connected them as follows:
-
Prasit serial 1 (s1) DTE is connected to America serial 1/4 (s1/4) DCE.
-
Spicey serial 0 (s0) DTE is connected to America serial 1/5 (s1/5) DCE
-
Aton serial 1 (s1) DTE is connected to America serial 3/4 (s3/4) DCE.
Network Diagram
This document is based on the following configuration:
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Spicey ! ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 ip address 3.1.3.1 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 130 frame-relay interface-dlci 140 ! ! router rip network 3.0.0.0 network 124.0.0.0 ! line con 0 ! exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... Current configuration : 1499 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Prasit ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 ip address 3.1.3.2 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 150 ! ! router rip network 3.0.0.0 network 123.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Aton |
|---|
Aton#show running-config Building configuration... Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Aton ! ! ! interface Ethernet0 ip address 122.122.122.1 255.255.255.0 ! interface Serial1 ip address 3.1.3.3 255.255.255.0 encapsulation frame-relay frame-relay interface-dlci 160 ! router rip network 3.0.0.0 network 122.0.0.0 ! ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
America |
|---|
america#show running-config Building configuration... Current configuration: ! ! service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname america ! frame-relay switching ! ! interface Serial1/4 description *** static DCE connection to s1 Prasit no ip address encapsulation frame-relay clockrate 2000000 frame-relay intf-type dce frame-relay route 150 interface Serial1/5 140 ! interface Serial1/5 description *** static DCE connection to s0 spicy no ip address encapsulation frame-relay bandwidth 1000000 tx-queue-limit 100 frame-relay intf-type dce frame-relay route 130 interface Serial3/4 160 frame-relay route 140 interface Serial1/4 150 transmitter-delay 10 ! interface Serial3/4 description *** static DCE connection to s1 Aton encapsulation frame-relay no ip mroute-cache clockrate 2000000 frame-relay intf-type dce frame-relay route 160 interface Serial1/5 130 ! |
show Commands
Use the following show commands to test that your network is operating properly:
-
show frame-relay map
-
show frame-relay pvc
The output shown below is a result of entering these commands on the devices we are using in this sample configuration.
Spicey
Spicey#show frame-relay map
Serial0 (up): ip 3.1.3.2 dlci 140(0x8C,0x20C0), dynamic,
broadcast,, status defined, active
Serial0 (up): ip 3.1.3.3 dlci 130(0x82,0x2020), dynamic,
broadcast,, status defined, active
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 2 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 130, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 32 output pkts 40 in bytes 3370
out bytes 3928 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 30 out bcast bytes 2888
pvc create time 00:15:46, last time pvc status changed 00:10:42
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0
input pkts 282 output pkts 291 in bytes 25070
out bytes 27876 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 223 out bcast bytes 20884
pvc create time 02:28:36, last time pvc status changed 02:25:14
Prasit
Prasit#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 150(0x96,0x2460), dynamic,
broadcast,, status defined, active
Prasit#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0
DLCI = 150, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1
input pkts 311 output pkts 233 in bytes 28562
out bytes 22648 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 162 out bcast bytes 15748
pvc create time 02:31:39, last time pvc status changed 02:25:14
Aton
Aton#show frame-relay map
Serial1 (up): ip 3.1.3.1 dlci 160(0xA0,0x2800), dynamic, broadcast, status defined, active
Aton#show frame-relay pvc
PVC Statistics for interface Serial1 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 160, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial
input pkts 35 output pkts 32 in bytes 3758
out bytes 3366 dropped pkts 0 in FECN pkt 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 27 out bcast bytes 2846
pvc create time 00:10:53, last time pvc status changed 00:10:53
Configuring Frame Relay DLCI Prioritization
Data-link connection identifier (DLCI) prioritization is the process whereby different traffic types are placed upon separate DLCIs so that a Frame Relay network can provide a different committed information rate for each traffic type. It can be used in conjunction with either custom queuing or priority queuing to provide bandwidth management control over the access link to the Frame Relay network. In addition, some Frame Relay service providers and Frame Relay switches (such as the Stratacom Internetwork Packet Exchange [IPX], IGX and BPX or AXIS switches) actually provide prioritization within the Frame Relay cloud based on this priority setting.
Implementation Considerations
When implementing DLCI prioritization, please note the following points:
-
If a secondary DLCI goes down, you lose traffic destined for that queue only.
-
If you lose the primary DLCI, the subinterface goes down and you lose all traffic.
Network Diagram
In order to use this setup, you need to have four DLCIs for the side that will use the DLCI prioritization. In this example, we have configured Spicey for priority queueing as follows:
-
Ping is in the high-priority queue.
-
Telnet is in the medium-priority queue.
-
File Transfer Protocol (FTP) is in the normal-priority queue.
-
All other IP traffic is in the low-priority queue.
Note: Make sure you configure the DLCIs to correspond with the priority list, or the system will not use the correct queue.
Configurations
|
Spicey |
|---|
Spicey#show running-config Building configuration... Current configuration : 1955 bytes ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec ! hostname Spicey ! ! interface Ethernet0 ip address 124.124.124.1 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay priority-group 1 ! interface Serial0.1 point-to-point ip address 4.0.1.1 255.255.255.0 frame-relay priority-dlci-group 1 140 180 190 200 frame-relay interface-dlci 140 ! router igrp 2 network 4.0.0.0 network 124.0.0.0 ! access-list 102 permit icmp any any priority-list 1 protocol ip high list 102 priority-list 1 protocol ip medium tcp telnet priority-list 1 protocol ip normal tcp ftp priority-list 1 protocol ip low ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
|
Prasit |
|---|
Prasit#show running-config Building configuration... ! version 12.1 service timestamps debug datetime msec service timestamps log datetime msec ! hostname Prasit ! ! ! interface Ethernet0 ip address 123.123.123.1 255.255.255.0 ! interface Serial1 ip address 4.0.1.2 255.255.255.0 encapsulation frame-relay ! router igrp 2 network 4.0.0.0 network 123.0.0.0 ! line con 0 exec-timeout 0 0 transport input none line aux 0 line vty 0 4 login ! end |
debug and show Commands
Use the following show and debug commands to test that your network is operating properly. Before issuing debug commands, please see Important Information on Debug Commands.
-
show frame-relay pvc
-
show frame-relay map
-
show queueing priority
-
debug priority
The output shown below is a result of entering these commands on the devices we are using in this sample configuration.
Spicey
Spicey#show frame-relay pvc
PVC Statistics for interface Serial0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 4 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 140, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0.1
input pkts 106 output pkts 15 in bytes 6801
out bytes 1560 dropped pkts 0 in FECN pkts 0
in BECN pkts 0 out FECN pkts 0 out BECN pkts 0
in DE pkts 0 out DE pkts 0
out bcast pkts 0 ou