Configuring VPN MPLS over POS, SRP and ATM on Cisco GSRs

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Updated:June 5, 2005
Document ID:10444

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

Introduction

This document provides a sample configuration for Multiprotocol Label Switching (MPLS) virtual private network (VPN) over ATM, packet over SONET/SDH (POS), and spatial reuse protocol (SRP) on Cisco 12000 Gigabit Switch Routers (GSRs).

These acronyms are used in this document.

  • CE —Customer Edge router

  • PE—Provider Edge router

  • P—Provider core router

  • VRF—Virtual Routing and Forwarding

Prerequisites

Requirements

Before you attempt this configuration, ensure these requirements are met:

  • Basic knowledge of MPLS and the MPLS VPN feature.

Components Used

The information in this document is based on these software and hardware versions:

  • P and PE routers

    • Cisco IOS® Software Release 12.0(28)S on all routers

    • Cisco GSR 12000 series routers

  • CE routers

    • Cisco IOS Software Release 12.0(28)S on all routers

    • Cisco 7200VXR routers

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Related Products

This configuration can also be used with these router platforms supported at the provider (P) core:

  • Cisco 7200

  • Cisco 7500

  • Cisco 7600

  • Cisco 8500

  • Cisco 10000

  • Cisco 10700

  • Cisco 12000

This configuration can also be used with these router platforms supported at the provider edge (PE):

  • Cisco 3600

  • Cisco 3700

  • Cisco 7200

  • Cisco 7500

  • Cisco 7600

  • Cisco 8500

  • Cisco 10000

  • Cisco 10700

  • Cisco 12000

Note: Cisco 3700/3600 routers do not have support for POS and SRP modules. Any platform below the 3600 does not support MPLS configuration.

Conventions

For more information on document conventions, refer to Cisco Technical Tips Conventions.

Background Information

MPLS is made available to support multiple physical interfaces. These interfaces includes ATM, POS and SRP. These interfaces are typically used for backbone connections due to their high bandwidth support. The MPLS VPN feature allows service providers to interconnect multiple sites without the need for ATM, POS or SRP at the customer side.

There are two implementations of MPLS over ATM. One is the use of virtual path identifier (VPI) and virtual channel identified (VCI) as the label which is also known as "cell-based" MPLS over ATM. This implementation is documented under RFC 3035 leavingcisco.com. The second ATM implementation is the use of the MPLS "shim header" which is also known as packet-based MPLS over ATM. This shim header is inserted between the Layer 2 and Layer 3 headers. The format of the shim header is documented under RFC 3032 leavingcisco.com. This sample configuration is based on the "shim header" implementation for the ATM interface.

Packet over Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH), is a technology that places the IP layer directly above the SONET layer. It eliminates the overhead needed to run IP over ATM over SONET. POS supports multiple encapsulation format. These are PPP, HDLC and Frame Relay. The shim header is used to provide MPLS support. This sample configuration uses the default HDLC encapsulation on Cisco POS interfaces.

Spatial Reuse Protocol (SRP) is a Layer 2 technology that provides resiliency at the Layer 2 level. It also runs on top of SONET/SDH. MPLS support is provided by the shim header implementation.

Configure

In this section, you are presented with the information to configure the features described in this document.

Note: To find additional information on the commands used in this document, use the Command Lookup Tool (registered customers only) .

Network Diagram

This document uses this network setup:

gsrvpn.gif

Configurations

This lists some considerations made on the sample configuration:

  • The MPLS VPN sample configuration service EIGRP routes from the CEs. Cisco bug ID CSCds09932 (registered customers only) has introduced EIGRP support for MPLS VPN with Cisco IOS Software Release 12.0(22)S. This has been ported to Cisco IOS Software Release 12.2T via Cisco bug ID CSCdx26186 (registered customers only) starting on Cisco IOS Software Release 12.2(15)T. The application of the same VRF to multiple EIGRP instances is not supported and can crash the router. A check on this issue was later integrated with Cisco bug ID CSCdz40426 (registered customers only) . Refer to MPLS VPN Support for EIGRP Between Provider Edge and Customer Edge to learn more about the MPLS VPN support for EIGRP.

  • The EIGRP autonomous system is the same on both CE routers. The BGP autonomous system is the same on both PE routers.

  • The MPLS backbone is based on POS, ATM and SRP interfaces and configured with Open Shortest Path First (OSPF) and MP-BGP. The connection between PE and CE is Fast Ethernet.

This document uses these configurations:

CE(1) 
!
version 12.0
!

ip cef



!--- CEF is not required on the CE because there is no MPLS configuration. !--- CEF is the fastest switching algorithm on Cisco routers !--- and it is best to leave it enabled.


!

!

interface Loopback0
 ip address 11.1.1.1 255.255.255.0
!
interface Loopback1
 ip address 11.2.1.1 255.255.255.0
!
interface Loopback2
 ip address 11.3.1.1 255.255.255.0
!
interface FastEthernet2/0
 ip address 192.168.2.2 255.255.255.252
!

router eigrp 100
 network 11.0.0.0
 network 192.168.2.0
 no auto-summary
!
ip classless

PE(1) 
!
version 12.0
!


!--- CEF is enabled by default on GSR.
. 

!

ip vrf Customer_A
 rd 100:1
 route-target export 100:1
 route-target import 100:1


!--- Enables the VPN routing and forwarding (VRF) routing table.
     

!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
 ip vrf forwarding Customer_A


!--- Associates a VRF instance with an interface or subinterface.


 ip address 192.168.2.1 255.255.255.252
!
interface POS4/0
 ip address 10.0.0.1 255.255.255.252
 tag-switching ip      


!--- Enables dynamic Label Switching of IPv4 packets on an interface. !--- At minimum, this is all you need to configure MPLS over POS. !--- Note the default encapsulation of POS interfaces is HDLC. !--- An mpls ip command can also be used instead of tag-switching ip. 


 crc 32
 clock source internal
!
!
router eigrp 1
!
address-family ipv4 vrf Customer_A
 redistribute bgp 100 metric 10000 1 255 1 1500
 network 192.168.2.0
 no auto-summary
 autonomous-system 100
 

!--- The autonomous-system 100 must match the AS used on the CE. !--- The bgp must be redistributed with metric. The default-metric !--- command can also be used.



 exit-address-family
!
router ospf 1
 log-adjacency-changes
 network 1.1.1.1 0.0.0.0 area 0
 network 10.0.0.1 0.0.0.0 area 0
!
router bgp 100
 bgp log-neighbor-changes
 neighbor 4.4.4.4 remote-as 100
 neighbor 4.4.4.4 update-source Loopback0
!
address-family vpnv4
 neighbor 4.4.4.4 activate
 neighbor 4.4.4.4 send-community both
 exit-address-family
!
address-family ipv4 vrf Customer_A
 redistribute eigrp 100


!--- The EIGRP AS 100 must be redistributed to the BGP vrf instance.


 no auto-summary
 no synchronization
 exit-address-family
!
ip classless

P(1) 
!
version 12.0
!
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface POS2/0
 ip address 10.0.0.2 255.255.255.252
 tag-switching ip
      

!--- This enables MPLS over POS.


 crc 32
!
!
interface ATM6/0
 no ip address
!
interface ATM6/0.100 point-to-point
 ip address 10.1.1.1 255.255.255.252
 tag-switching ip
 pvc 0/100
 !


!--- This enables "packet-based" MPLS over ATM.


!
router ospf 1
 log-adjacency-changes
 network 2.2.2.2 0.0.0.0 area 0
 network 10.0.0.2 0.0.0.0 area 0
 network 10.1.1.1 0.0.0.0 area 0
!
ip classless

P(2) 
!
version 12.0
!
!
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface ATM4/0
 no ip address
!
interface ATM4/0.100 point-to-point
 ip address 10.1.1.2 255.255.255.252
 tag-switching ip
 pvc 0/100


!--- This enables "packet-based" MPLS over ATM.


 !
!
interface SRP5/0
 ip address 10.2.2.1 255.255.255.252
 no ip directed-broadcast
 tag-switching ip


!--- This enables MPLS over SRP.


!
router ospf 1
 log-adjacency-changes
 network 3.3.3.3 0.0.0.0 area 0
 network 10.1.1.2 0.0.0.0 area 0
 network 10.2.2.1 0.0.0.0 area 0
!
ip classless

PE(2) 
!
version 12.0
!
!
ip vrf Customer_A
 rd 100:1
 route-target export 100:1
 route-target import 100:1
!
!
interface Loopback0
 ip address 4.4.4.4 255.255.255.255
!
interface SRP4/0
 ip address 10.2.2.2 255.255.255.252
 tag-switching ip


!--- This enables MPLS over SRP.


!
interface FastEthernet6/0
 ip vrf forwarding Customer_A


!--- Associates a VRF instance with an interface or subinterface.


 ip address 192.168.1.1 255.255.255.252
!
!
router eigrp 1
!
address-family ipv4 vrf Customer_A
 redistribute bgp 100 metric 10000 1 255 1 1500
 network 192.168.1.0
 no auto-summary
 autonomous-system 100
 exit-address-family


!--- The autonomous-system 100 must match the AS used on the CE. !--- The bgp must be redistributed with metric. The default-metric !--- command can also be used.


!
router ospf 1
 log-adjacency-changes
 network 4.4.4.4 0.0.0.0 area 0
 network 10.2.2.2 0.0.0.0 area 0
!
router bgp 100
 bgp log-neighbor-changes
 neighbor 1.1.1.1 remote-as 100
 neighbor 1.1.1.1 update-source Loopback0
!
address-family vpnv4
 neighbor 1.1.1.1 activate
 neighbor 1.1.1.1 send-community both
 exit-address-family
!
address-family ipv4 vrf Customer_A
 redistribute eigrp 100


!--- The EIGRP AS 100 must be redistributed to the BGP vrf instance.


 no auto-summary
 no synchronization
 exit-address-family
!
ip classless

CE(2) 
!
version 12.0
!

ip cef


!--- CEF is not required on the CE because there is no MPLS configuration. !--- CEF is the fastest switching algorithm on Cisco routers so it is !--- best to leave it enabled.


!

!
interface Loopback0
 ip address 22.1.1.1 255.255.255.0
!
interface Loopback1
 ip address 22.2.1.1 255.255.255.0
!
interface Loopback2
 ip address 22.3.1.1 255.255.255.0
!
interface FastEthernet2/0
 ip address 192.168.1.2 255.255.255.252
!
!
router eigrp 100
 network 22.0.0.0
 network 192.168.1.0
 no auto-summary
!

Verify

This section provides information you can use to confirm your configuration is working properly.

Certain show commands are supported by the Output Interpreter Tool (registered customers only) , which allows you to view an analysis of show command output.

  • show ip vrf—Verifies that the correct VRF exists.

  • show ip route vrf Customer_A—Verifies the routing information on the PE routers.

  • ping vrf Customer_A <ip address>—Verifies connectivity by sending ICMP packets.

  • traceroute vrf Customer_A <ip address>—Verifies the routing information on the PE routers.

  • show ip eigrp vrf Customer_A neighbors—Verifies the EIGRP neighbor inside the VRF instance.

  • show ip eigrp vrf Customer_A topology—Verifies EIGRP topology inside the VRF instance.

  • show ip bgp vpnv4 vrf Customer_A—Verifies the BGP table inside the VRF instance.

  • show ip cef vrf Customer_A <ip address> detail—Verifies the CEF table inside the VRF instance.

  • show tag-switching forwarding-table—Verifies if there is a route/tag for the destination prefix.

  • show ip route—Verifies that CEs exchange routes.

PE(1) 

PE(1)#show ip vrf
  Name                             Default RD          Interfaces
  Customer_A                       100:1               FastEthernet0/0



PE(1)#show ip route vrf Customer_A

Routing Table: Customer_A
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, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR

Gateway of last resort is not set

     22.0.0.0/24 is subnetted, 3 subnets
B       22.3.1.0 [200/156160] via 4.4.4.4, 01:12:28
B       22.2.1.0 [200/156160] via 4.4.4.4, 01:12:28
B       22.1.1.0 [200/156160] via 4.4.4.4, 01:12:28
     11.0.0.0/24 is subnetted, 3 subnets
D       11.2.1.0 [90/156160] via 192.168.2.2, 01:12:50, FastEthernet0/0
D       11.3.1.0 [90/156160] via 192.168.2.2, 01:12:50, FastEthernet0/0
D       11.1.1.0 [90/156160] via 192.168.2.2, 01:12:50, FastEthernet0/0
     192.168.1.0/30 is subnetted, 1 subnets
B       192.168.1.0 [200/0] via 4.4.4.4, 01:16:14
     192.168.2.0/30 is subnetted, 1 subnets
C       192.168.2.0 is directly connected, FastEthernet0/0

PE(1)#ping vrf Customer_A 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
D-GSR-12012-2A#ping vrf Customer_A ip ?
  WORD  Ping destination address or hostname
  <cr>

PE(1)#ping vrf Customer_A ip
Target IP address: 192.168.1.2
Repeat count [5]: 100
Datagram size [100]: 1500
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 100, 1500-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 1/2/4 ms

PE(1)#traceroute vrf Customer_A 192.168.1.2

Type escape sequence to abort.
Tracing the route to 192.168.1.2

  1 10.0.0.2 [MPLS: Labels 18/28 Exp 0] 0 msec 0 msec 0 msec
  2 10.1.1.2 [MPLS: Labels 19/28 Exp 0] 0 msec 0 msec 0 msec
  3 192.168.1.1 4 msec 0 msec 0 msec
  4 192.168.1.2 4 msec 0 msec *

PE(1)#show ip eigrp vrf Customer_A neighbors
IP-EIGRP neighbors for process 100
H   Address                 Interface      Hold Uptime   SRTT   RTO  Q  Seq Type
                                           (sec)         (ms)       Cnt Num
0   192.168.2.2             Fa0/0            11 10:51:41   10   200  0  8

PE(1)#show ip eigrp vrf Customer_A topology
IP-EIGRP Topology Table for AS(100)/ID(192.168.2.1) Routing Table: Customer_A

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - Reply status

P 11.2.1.0/24, 1 successors, FD is 156160
         via 192.168.2.2 (156160/128256), FastEthernet0/0
P 11.3.1.0/24, 1 successors, FD is 156160
         via 192.168.2.2 (156160/128256), FastEthernet0/0
P 11.1.1.0/24, 1 successors, FD is 156160
         via 192.168.2.2 (156160/128256), FastEthernet0/0
P 22.3.1.0/24, 1 successors, FD is 156160
         via VPNv4 Sourced (156160/0)
P 22.2.1.0/24, 1 successors, FD is 156160
         via VPNv4 Sourced (156160/0)
P 22.1.1.0/24, 1 successors, FD is 156160
         via VPNv4 Sourced (156160/0)
P 192.168.1.0/30, 1 successors, FD is 28160
         via VPNv4 Sourced (28160/0)
P 192.168.2.0/30, 1 successors, FD is 28160
         via Connected, FastEthernet0/0

PE(1)#show ip bgp vpnv4 vrf Customer_A
BGP table version is 17, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf Customer_A)
*> 11.1.1.0/24      192.168.2.2         156160         32768 ?
*> 11.2.1.0/24      192.168.2.2         156160         32768 ?
*> 11.3.1.0/24      192.168.2.2         156160         32768 ?
*>i22.1.1.0/24      4.4.4.4             156160    100      0 ?
*>i22.2.1.0/24      4.4.4.4             156160    100      0 ?
*>i22.3.1.0/24      4.4.4.4             156160    100      0 ?
*>i192.168.1.0/30   4.4.4.4                  0    100      0 ?
*> 192.168.2.0/30   0.0.0.0                  0         32768 ?

PE(1)#show ip cef vrf Customer_A
Prefix              Next Hop             Interface
0.0.0.0/0           drop                 Null0 (default route handler entry)
0.0.0.0/32          receive
11.1.1.0/24         192.168.2.2          FastEthernet0/0
11.2.1.0/24         192.168.2.2          FastEthernet0/0
11.3.1.0/24         192.168.2.2          FastEthernet0/0
22.1.1.0/24         10.0.0.2             POS4/0
22.2.1.0/24         10.0.0.2             POS4/0
22.3.1.0/24         10.0.0.2             POS4/0
192.168.1.0/30      10.0.0.2             POS4/0
192.168.2.0/30      attached             FastEthernet0/0
192.168.2.0/32      receive
192.168.2.1/32      receive
192.168.2.2/32      192.168.2.2          FastEthernet0/0
192.168.2.3/32      receive
224.0.0.0/4         drop
224.0.0.0/24        receive
255.255.255.255/32  receive

PE(1)#show ip cef vrf Customer_A 11.1.1.0 detail
11.1.1.0/24, version 16, epoch 0, cached adjacency 192.168.2.2
0 packets, 0 bytes
  tag information set, all rewrites owned
    local tag: 27
  via 192.168.2.2, FastEthernet0/0, 0 dependencies
    next hop 192.168.2.2, FastEthernet0/0
    valid cached adjacency
    tag rewrite with Fa0/0, 192.168.2.2, tags imposed {}

PE(1)#show tag-switching forwarding-table
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
tag    tag or VC   or Tunnel Id      switched   interface
16     Pop tag     2.2.2.2/32        0          PO4/0      point2point
17     17          3.3.3.3/32        0          PO4/0      point2point
18     18          4.4.4.4/32        0          PO4/0      point2point
19     19          10.2.2.0/30       0          PO4/0      point2point
20     Pop tag     10.1.1.0/30       0          PO4/0      point2point
22     Untagged    11.2.1.0/24[V]    0          Fa0/0      192.168.2.2
26     Untagged    11.3.1.0/24[V]    0          Fa0/0      192.168.2.2
27     Untagged    11.1.1.0/24[V]    0          Fa0/0      192.168.2.2
28     Aggregate   192.168.2.0/30[V] 255132

PE(1)#show tag-switching forwarding-table vrf Customer_A
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
tag    tag or VC   or Tunnel Id      switched   interface
22     Untagged    11.2.1.0/24[V]    0          Fa0/0      192.168.2.2
26     Untagged    11.3.1.0/24[V]    0          Fa0/0      192.168.2.2
27     Untagged    11.1.1.0/24[V]    0          Fa0/0      192.168.2.2
28     Aggregate   192.168.2.0/30[V] 255132

P(1) 

P(1)A#show tag-switching forwarding-table
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
tag    tag or VC   or Tunnel Id      switched   interface
16     Pop tag     1.1.1.1/32        260843     PO2/0      point2point
17     Pop tag     3.3.3.3/32        0          AT6/0.100  point2point
18     19          4.4.4.4/32        269131     AT6/0.100  point2point
19     Pop tag     10.2.2.0/30       0          AT6/0.100  point2point

P(2) 

P(2)#show tag-switching forwarding-table
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
tag    tag or VC   or Tunnel Id      switched   interface
16     Pop tag     10.0.0.0/30       0          AT4/0.100  point2point
17     Pop tag     2.2.2.2/32        0          AT4/0.100  point2point
18     16          1.1.1.1/32        269930     AT4/0.100  point2point
19     Pop tag     4.4.4.4/32        276490     SR5/0      10.2.2.2

PE(2) 

PE(2)#show tag-switching forwarding-table
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop
tag    tag or VC   or Tunnel Id      switched   interface
16     18          1.1.1.1/32        0          SR4/0      10.2.2.1
17     17          2.2.2.2/32        0          SR4/0      10.2.2.1
18     Pop tag     3.3.3.3/32        0          SR4/0      10.2.2.1
19     16          10.0.0.0/30       0          SR4/0      10.2.2.1
20     Pop tag     10.1.1.0/30       0          SR4/0      10.2.2.1
25     Untagged    22.1.1.0/24[V]    2280       Fa6/0      192.168.1.2
26     Untagged    22.2.1.0/24[V]    570        Fa6/0      192.168.1.2
27     Untagged    22.3.1.0/24[V]    570        Fa6/0      192.168.1.2
28     Aggregate   192.168.1.0/30[V] 251808

CE(1) 

CE(1)#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, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR

Gateway of last resort is not set

     22.0.0.0/24 is subnetted, 3 subnets
D       22.3.1.0 [90/158720] via 192.168.2.1, 00:35:45, FastEthernet2/0
D       22.2.1.0 [90/158720] via 192.168.2.1, 00:35:45, FastEthernet2/0
D       22.1.1.0 [90/158720] via 192.168.2.1, 00:35:45, FastEthernet2/0
     11.0.0.0/24 is subnetted, 3 subnets
C       11.2.1.0 is directly connected, Loopback1
C       11.3.1.0 is directly connected, Loopback2
C       11.1.1.0 is directly connected, Loopback0
     192.168.1.0/30 is subnetted, 1 subnets
D       192.168.1.0 [90/30720] via 192.168.2.1, 00:35:46, FastEthernet2/0
     192.168.2.0/30 is subnetted, 1 subnets
C       192.168.2.0 is directly connected, FastEthernet2/0

CE(1)#ping 22.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 22.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

CE(2) 

D-R7206-5A#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, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR

Gateway of last resort is not set

     22.0.0.0/24 is subnetted, 3 subnets
C       22.3.1.0 is directly connected, Loopback2
C       22.2.1.0 is directly connected, Loopback1
C       22.1.1.0 is directly connected, Loopback0
     11.0.0.0/24 is subnetted, 3 subnets
D       11.2.1.0 [90/158720] via 192.168.1.1, 00:36:32, FastEthernet2/0
D       11.3.1.0 [90/158720] via 192.168.1.1, 00:36:32, FastEthernet2/0
D       11.1.1.0 [90/158720] via 192.168.1.1, 00:36:32, FastEthernet2/0
     192.168.1.0/30 is subnetted, 1 subnets
C       192.168.1.0 is directly connected, FastEthernet2/0
     192.168.2.0/30 is subnetted, 1 subnets
D       192.168.2.0 [90/30720] via 192.168.1.1, 00:36:33, FastEthernet2/0

CE(2)#ping 11.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 11.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

Related Information

Revision History

Revision Publish Date Comments
1.0
05-Jun-2005
Initial Release

Contributed by

  • rpunzala
    tknapp

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