Table Of Contents
Configuring the Fast Ethernet and Gigabit Ethernet SPAs
Specifying the Interface Address
Modifying the MAC Address on the Interface
Gathering MAC Address Accounting Statistics
Modifying the Interface MTU Size
Configuring the Encapsulation Type
Configuring Autonegotiation on an Interface
Configuring a Subinterface on a VLAN
Configuring Flow Control Support on the Link
Shutting Down and Restarting an Interface on a SPA
Verifying the Interface Configuration
Verifying Per-Port Interface Status
Basic Interface Configuration Example
MAC Address Configuration Example
Configuring the Fast Ethernet and Gigabit Ethernet SPAs
This chapter provides information about configuring the Cisco 1-port 10 Gigabit Ethernet SPA, 5-Port Gigabit Ethernet SPA, 8-Port Fast Ethernet SPA,and Cisco 10-port Gigabit Ethernet SPA on Cisco 12000 series routers. It includes the following sections:
•
Verifying the Interface Configuration
For information about managing your system images and configuration files, refer to the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.0 and Cisco IOS Configuration Fundamentals Command Reference, Release 12.0 publications.
For more information about the commands used in this chapter, first see Chapter 19, "SIP and SPA Command Reference," which documents new and modified commands. Also refer to the related Cisco IOS Release 12.0 software command reference and master index publications. For more information about accessing these publications, see the "Related Documentation" section on page -xviii.
Configuration Tasks
This section describes how to configure the Cisco 1-port 10 Gigabit Ethernet SPA, 5-Port Gigabit Ethernet SPA, 8-Port Fast Ethernet, and the Cisco 10-port Gigabit Ethernet SPA and includes information about verifying the configuration.
This section includes the following topics:
•
•
•
•
•
•
•
•
•
Required Configuration Tasks
This section lists the required configuration steps to configure the Gigabit Ethernet SPAs. Some of the required configuration commands implement default values that might be appropriate for your network. If the default value is correct for your network, then you do not need to configure the command. These commands are indicated by "(As Required)" in the purpose column.
Required Configuration Tasks for the Fast Ethernet SPA
To configure the 8-Port Fast Ethernet SPA, complete the following steps:
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# interface fastethernet slot/subslot/port[.subinterface-number]
Specifies the Fast Ethernet interface to configure, where:
•
•
Step 3
Router(config-if)# ip address ip-address mask [secondary]
Sets a primary or secondary IP address for an interface, where:
•
•
•
Step 4
Router(config-if)# duplex {full | half}
(As Required) Configures the duplex operation on an interface.
The default is full.
Step 5
Router(config-if)# speed {10 | 100}
(As Required) Configures the speed of an interface (Mbps).
Step 6
Router(config-if)# mtu bytes
(As Required) Specifies the maximum packet size for an interface, where:
•
Step 7
Router(config-if)# no shutdown
Enables the interface.
Required Configuration Tasks for the Gigabit Ethernet SPA
To configure the Cisco 1-port 10 Gigabit Ethernet SPA, 5-Port Gigabit Ethernet SPA, and Cisco 10-port Gigabit Ethernet SPA, complete the following steps:
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# interface gigabitethernet slot/subslot/port[.subinterface-number]
or
Router(config)# interface tengigabitethernet slot/subslot/port[.subinterface-number]
Specifies the Gigabit Ethernet or Ten Gigabit Ethernet interface to configure, where:
•
•
Step 3
Router(config-if)# ip address ip-address mask [secondary]
For IPv4:
Sets a primary or secondary IP address for an interface that is using IPv4, where:
•
•
•
Step 4
Router(config)# ip accounting mac-address {input | output}
(Optional) Enables MAC address accounting. MAC address accounting provides accounting information for IP traffic based on the source and destination MAC addresses of the LAN interfaces, where:
•
•
Step 5
Router(config-if)# mtu bytes
(As Required) Specifies the maximum packet size for an interface, where:
•
The default is 1500 bytes.
Step 6
Router(config-if)# standby [group-number] ip [ip-address [secondary]]
(Required for HSRP Configuration Only) Creates (or enables) the HSRP group using its number and virtual IP address.
•
•
•
This command enables HSRP but does not configure it further. For additional information on configuring HSRP, see the " Configuring Hot Standby Routing Protocol" section of the Cisco IOS Release 12.2 IP Configuration Guide.
Step 7
Router(config-if)# no shutdown
Enables the interface.
Specifying the Interface Address
The interface address format when using SPAs is slot/subslot/port:
•
•
•
–
–
–
–
Figure 5-1 shows the slot, subslot, and interface port locations of the Cisco 10-port Gigabit Ethernet SPA on a Cisco 12000 series router.
Figure 5-1 Slot, Subslot, and Port Locations for the Cisco 10-port Gigabit Ethernet SPA and the 1-Port 10-Gigabit Ethernet SPA.
Table 5-1 Slot and Port Locations for the Gigabit Ethernet SPAs
1
Slot 3
2
Subslot 0, Port 3/0/0
3
Subslot 1, Ports 3/1/0 to 3/1/9
For more information about the installation of cards on the Cisco 12000 router, refer to the Cisco 12000 SIP and SPA Hardware Installation Guide.
Modifying the MAC Address on the Interface
The Fast Ethernet and Gigabit Ethernet SPAs use a default MAC address for each port that is derived from the base address that is stored in the electrically erasable programmable read-only memory (EEPROM) on the backplane of the Cisco 12000 series router.
To modify the default MAC address of an interface to some user-defined address, use the following command in interface configuration mode:
To return to the default MAC address on the interface, use the no form of the command.
Verifying the MAC Address
To verify the MAC address of an interface, use the show interfaces gigabitethernet privileged EXEC command and observe the value shown in the "address is" field.
The following example shows that the MAC address is 0008.7db3.8dfe for interface 0 on the SPA installed in slot 3 of the Cisco 12000 series router:
Router# show interfaces gigabitethernet 3/0/0GigabitEthernet3/0/0 is up, line protocol is upHardware is GigMac 1 Port 10 GigabitEthernet, address is 0008.7db3.8dfe (bia )Internet address is 10.0.0.2/24MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not set...Gathering MAC Address Accounting Statistics
The ip accounting mac-address [input | output] command can be entered to enable MAC Address Accounting on an interface.
After enabling MAC Address Accounting, MAC address statistics can be gathered by entering the show interface mac command.
Configuring HSRP
Hot Standby Router Protocol (HSRP) is available for Fast Ethernet and Gigabit Ethernet SPAs. HSRP provides high network availability because it routes IP traffic from hosts without relying on the availability of any single router. HSRP is used in a group of routers for selecting an active router and a standby router. (An active router is the router of choice for routing packets; a standby router is a router that takes over the routing duties when an active router fails, or when preset conditions are met).
HSRP is enabled on an interface by entering the standby [group-number] ip [ip-address [secondary]] command. The standby command is also used to configure various HSRP elements. This document does not discuss more complex HSRP configurations. For additional information on configuring HSRP, see the Configuring Hot Standby Routing Protocol section of the Cisco IOS Release 12.2 IP Configuration Guide.
In the following HSRP configuration, standby group 2 on GigabitEthernet port 2/1/0 is configured at a priority of 110 and is also configured to have a preemptive delay should a switchover to this port occur.
Router(config)#interface GigabitEthernet 2/1/0
Router(config-if)#standby 2 ip 120.12.1.200
Router(config-if)#standby 2 priority 110
Router(config-if)#standby 2 preemptModifying the Interface MTU Size
The Cisco IOS software supports three different types of configurable maximum transmission unit (MTU) options at different levels of the protocol stack:
•
•
•
Different encapsulation methods and the number of MPLS MTU labels add additional overhead to a packet. For example, Subnetwork Access Protocol (SNAP) encapsulation adds an 8-byte header, dot1q encapsulation adds a 2-byte header, and each MPLS label adds a 4-byte header (n labels x 4 bytes).
For the Fast Ethernet and Gigabit Ethernet SPAs on the Cisco 12000 series router, the default MTU size is 1500 bytes. The maximum configurable MTU is 9216 bytes. The SPA automatically adds an additional 38 bytes to the configured MTU size to accommodate some of the additional overhead.
Interface MTU Configuration Guidelines
When configuring the interface MTU size on a Fast Ethernet or Gigabit Ethernet SPA on a Cisco 12000 series router, consider the following guidelines:
•
–
–
–
–
–
Note
•
•
Interface MTU Configuration Task
To modify the MTU size on an interface, use the following command in interface configuration mode:
Router(config-if)# mtu bytes
Configures the maximum packet size for an interface, where:
•
The default is 1500 bytes.
To return to the default MTU size, use the no form of the command.
Verifying the MTU Size
To verify the MTU size for an interface, use the show interfaces fastethernet or show interfaces gigabitethernet, or show interfaces tengigabitethernet privileged EXEC command and observe the value shown in the "MTU" field.
The following example shows an MTU size of 1500 bytes for interface port 0 (the first port) on the Gigabit Ethernet SPA installed in the top subslot (0) of the MSC that is located in slot 3 of the Cisco 12000 series router:
Router# show interfaces gigabitethernet 3/0/0GigabitEthernet3/0/0 is up, line protocol is upHardware is GigMac 1 Port 10 GigabitEthernet, address is 0008.7db3.8dfe (bia )Internet address is 10.0.0.2/24MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full Duplex, 10000Mbps, link type is autonegotiation, media type is Toutput flow-control is on, input flow-control is onARP type: ARPA, ARP Timeout 04:00:00Last input 00:00:01, output 00:00:01, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 10000000 kilobits/sec30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 0 bits/sec, 0 packets/sec11 packets input, 1154 bytes, 0 no bufferReceived 1 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input67 packets output, 20951 bytes, 0 underruns0 output errors, 0 collisions, 1 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped outConfiguring the Encapsulation Type
By default, the interfaces on the Cisco 1-port 10 Gigabit Ethernet SPA, 5-Port Gigabit Ethernet SPA,8-Port Fast Ethernet SPA, and Cisco 10-port Gigabit Ethernet SPA support Advanced Research Projects Agency (ARPA) encapsulation. They do not support configuration of service access point (SAP) or SNAP encapsulation for transmission of frames; however, the interfaces will properly receive frames that use SAP and SNAP encapsulation.
The only other encapsulation supported by the SPA interfaces is IEEE 802.1Q encapsulation for virtual LANs (VLANs).
Configuring Autonegotiation on an Interface
Ethernet interfaces use a connection-setup algorithm called autonegotiation. Autonegotiation allows the local and remote devices to configure compatible settings for communication over the link. Using autonegotiation, each device advertises its transmission capabilities and then agrees upon the settings to be used for the link.
For the Fast Ethernet and Gigabit Ethernet interfaces on the Cisco 12000 series router, flow control is autonegotiated when autonegotiation is enabled. For the 10 Gigabit Ethernet interfaces, autonegotiation is not an option.
The following guidelines should be followed regarding autonegotiation:
•
•
•
Disabling Autonegotiation
Autonegotiation is automatically enabled. During autonegotiation, advertisement for flow control is advertised. If the Fast Ethernet or Gigabit Ethernet interface is connected to a link that has autonegotiation disabled, autonegotiation should either be re-enabled on the other end of the link or disabled on the Fast Ethernet or Gigabit Ethernet SPA. Both ends of the link will not come up properly if only one end of the link has disabled autonegotiation.
To disable autonegotiation on a Fast Ethernet or Gigabit Ethernet interface, use the following command in interface configuration mode:
Router(config-if)# no negotiation auto
Disables autonegotiation on Gigabit Ethernet SPA interfaces. No advertisement of flow control occurs.
Enabling Autonegotiation
Autonegotiation is automatically enabled. During autonegotiation, advertisement and configuration of flow control occurs. To re-enable autonegotiation on a Fast Ethernet or Gigabit Ethernet interface, use the following command in interface configuration mode:
Router(config-if)# negotiation auto
Enables autonegotiation on Gigabit Ethernet SPA interfaces. Advertisement of flow control occurs.
Note
Configuring a Subinterface on a VLAN
You can configure subinterfaces on the Cisco 1-port 10 Gigabit Ethernet SPA, 5-Port Gigabit Ethernet SPA, 8-Port Fast Ethernet SPA, and Cisco 10-port Gigabit Ethernet SPA on a VLAN using IEEE 802.1Q encapsulation.
Note
To configure a SPA subinterface on a VLAN, use the following commands beginning in interface configuration mode:
Step 1
Router(config)# interface fastethernet slot/subslot/port.subinterface-number
or
Router(config)# interface gigabitethernet slot/subslot/port.subinterface-number
or
Router(config)# interface tengigabitethernet slot/subslot/port.subinterface-number
Specifies the Fast Ethernet, Gigabit Ethernet, or Ten Gigabit Ethernet interface to configure, where:
•
•
Step 2
Router(config-subif)# encapsulation dot1q vlan-id
Defines the encapsulation format as IEEE 802.1Q ("dot1q"), where vlan-id is the number of the VLAN (1-4095).
Step 3
Router(config-if)# ip address ip-address mask [secondary]
Sets a primary or secondary IP address for an interface, where:
•
•
•
Verifying Subinterface Configuration on a VLAN
To verify the configuration of a subinterface and its status on the VLAN, use the show vlans privileged EXEC command.
The following example shows the status of subinterface number 1 on port 0 on the SPA in VLAN number 200:
Router# show vlansVLAN ID:200 (IEEE 802.1Q Encapsulation)Protocols Configured: Received: Transmitted:IP 0 14VLAN trunk interfaces for VLAN ID 200:GigabitEthernet4/1/0.1 (200)IP:12.200.21.21Total 0 packets, 0 bytes inputTotal 2 packets, 120 bytes outputConfiguring Flow Control Support on the Link
Flow control is turned on or off based on the result of the autonegotiation. For information on this process, see "Configuring Autonegotiation on an Interface" section.
Verifying Flow Control Status
To verify flow control status on a Fast Ethernet or Gigabit Ethernet interface on a SPA, use the show interfaces fastethernet, show interfaces gigabitethernet ,or show interfaces tengigabitethernet privileged EXEC command and view the "output flow-control is" and " input flow-control is" output lines to see if input and output flow control is on or off. The "pause input" and "pause output" counters of the output of this command can be used to view the number of pause frames sent or received by the interface.
The following example shows that zero pause frames have been transmitted and received by the MAC device for interface port 3 (the fourth port) on the SPA located in subslot 0 of the MSC that is installed in slot 3 of the Cisco 12000 series router:
Router# show interfaces gigabitethernet 3/0/3GigabitEthernet3/0/3 is up, line protocol is upHardware is GigabitEthernet, address is 0008.7db3.8e01 (bia 0008.7db3.8e01)Internet address is 13.0.0.2/24MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full Duplex, 1000Mbps, link type is autonegotiation, media type is Toutput flow-control is on, input flow-control is onARP type: ARPA, ARP Timeout 04:00:00Last input 00:00:09, output 00:00:09, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 1000000 kilobits/sec30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 0 bits/sec, 0 packets/sec5 packets input, 520 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input26 packets output, 8286 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped outSaving the Configuration
To save your running configuration to nonvolatile random-access memory (NVRAM), use the following command in privileged EXEC configuration mode:
For more information about managing configuration files, refer to the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.0 and Cisco IOS Configuration Fundamentals Command Reference, Release 12.0 publications.
Shutting Down and Restarting an Interface on a SPA
You can shut down and restart any of the interface ports on a SPA independently of each other. Shutting down an interface stops traffic and enters the interface into an "administratively down" state.
If you are preparing for an OIR of a SPA, it is not necessary to independently shut down each of the interfaces prior to deactivation of the SPA. The hw-module subslot shutdown command automatically stops traffic on the interfaces and deactivates them along with the SPA in preparation for OIR.
In similar fashion, you do not need to independently restart any interfaces on a SPA after OIR of a SPA or MSC.
To shut down an interface on a SPA, use the following command in interface configuration mode:
To restart an interface on a SPA, use the following command in interface configuration mode:
Verifying the Interface Configuration
Besides using the show running-configuration command to display your router configuration settings, you can use the show interfaces gigabitethernet command to get detailed information on a per-port basis for your Cisco 1-port 10 Gigabit Ethernet SPA, 5-Port Gigabit Ethernet SPA, and Cisco 10-port Gigabit Ethernet SPA. For the 8-Port Fast Ethernet SPA, show interfaces fastethernet can be entered to gather detailed per-port information.
Verifying Per-Port Interface Status
To find detailed interface information on a per-port basis for the Fast Ethernet or Gigabit Ethernet SPAs, use the show interfaces fastethernet, show interfaces gigabitethernet , or show interfaces tengigabitethernet command. For a description of the command output, see Chapter 19, "SIP and SPA Command Reference."
The following example provides sample output for interface port 0 on the Gigabit Ethernet SPA located in the top subslot (0) of the MSC that is installed in slot 3 of the Cisco 12000 series router:
Router# show interfaces gigabitethernet 3/0/0GigabitEthernet3/0/0 is up, line protocol is upHardware is GigMac 1 Port 10 GigabitEthernet, address is 0008.7db3.8dfe (bia )Internet address is 10.0.0.2/24MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full Duplex, 10000Mbps, link type is autonegotiation, media type is Toutput flow-control is on, input flow-control is onARP type: ARPA, ARP Timeout 04:00:00Last input 00:00:01, output 00:00:01, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 10000000 kilobits/sec30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 0 bits/sec, 0 packets/sec11 packets input, 1154 bytes, 0 no bufferReceived 1 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input67 packets output, 20951 bytes, 0 underruns0 output errors, 0 collisions, 1 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped outThe following example provides sample output for interface port 0 on the Fast Ethernet SPA located in the top subslot (0) of the MSC that is installed in slot 7 of the Cisco 12000 series router:
Router# show interfaces fastethernet 7/0/0FastEthernet7/0/0 is administratively down, line protocol is downHardware is FastEthernet, address is 0000.001c.a400 (bia 0000.001c.a400)MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full Duplex, 100Mbps, link type is autonegotiation, media type is 100BaseTxoutput flow-control is unsupported, input flow-control is unsupportedARP type: ARPA, ARP Timeout 04:00:00Last input never, output never, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 100000 kilobits/sec5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec0 packets input, 0 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input0 packets output, 0 bytes, 0 underrunsTransmitted 0 broadcasts0 output errors, 0 collisions, 0 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 pause output0 output buffer failures, 0 output buffers swapped outConfiguration Examples
This section includes the following configuration examples:
•
•
Basic Interface Configuration Example
The following example shows how to enter global configuration mode to specify the interface that you want to configure, configure an IP address for the interface, and save the configuration. This example configures interface port 1 on the SPA that is located in subslot 0 of the MSC, that is installed in slot 3 of the Cisco 12000 series router:
!Enter global configuration mode
!
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.!
! Specify the interface address
!
Router(config)# interface gigabitethernet 3/0/1
!
! Configure an IP address
!
Router(config-if)# ip address 192.168.50.1 255.255.255.0
!
! Start the interface
!
Router(config-if)# no shut
!
! Save the configuration to NVRAM
!
Router(config-if)# exit
Router# copy running-config startup-config
The following example shows the same configuration on a port, but with an IPv6 address:
!Enter global configuration mode
!
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.!
!Enable IPv6 Routing
!
Router(config)#
!
! Specify the interface address
!
Router(config)# interface gigabitethernet 3/0/1
!
! Configure an IP address
!
Router(config-if)# ipv6 address 2001:10::1/64Router(config-if)# ipv6 address FEC0:11:1001:11::1/64!
! Start the interface
!
Router(config-if)# no shut
!
! Save the configuration to NVRAM
!
Router(config-if)# exit
Router# copy running-config startup-config
MAC Address Configuration Example
The following example changes the default MAC address on the interface to 1111.2222.3333:
!Enter global configuration mode
!
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.!
! Specify the interface address
!
Router(config)# interface gigabitethernet 3/0/1
!
! Modify the MAC address
!
Router(config-if)# mac-address 1111.2222.3333
MTU Configuration Example
The following example sets the interface MTU to 9216 bytes:
Note
!Enter global configuration mode
!
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.!
! Specify the interface address
!
Router(config)# interface gigabitethernet 3/0/1
!
! Configure the interface MTU
!
Router(config-if)# mtu 9216
VLAN Configuration Example
The following example creates subinterface number 268 on SPA interface port 2 (the third port), and configures the subinterface on the VLAN with ID number 269 using IEEE 802.1Q encapsulation:
Note
!Enter global configuration mode
!
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.!
! Specify the interface address
!
Router(config)# interface gigabitethernet 3/0/1.268
!
! Configure dot1q encapsulation and specify the VLAN ID
!
Router(config-subif)# encapsulation dot1q 268
