IP Sessions Over Gigabit EtherChannel

The IP Sessions Over Gigabit EtherChannel (IPoGEC) feature enables you to add the Link Aggregation Control Protocol (LACP) functionality for IP sessions. The LACP defines a virtual interface for a port channel or a port bundle, and adds physical member links to the port channel. This section provides information about the IPoGEC and how to configure it.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Restrictions for IPoGEC

IP Sessions over Gigabit EtherChannel (IPoGEC) currently supports the 1:1 model, where only one member link is active while the second member link is passive and does not carry traffic.

Information About IP Sessions over Gigabit EtherChannel

The IP sessions over Gigabit EtherChannel (IPoGEC) feature ensures consistency between systems by adding redundancy and allows dynamic link management during local and remote system failures. LACP fast switchover enables the standby member link to take over instantly (in milliseconds) when the active member link goes down. As a result, the port channel remains up. The carrier-delay {delay-seconds | msec milliseconds} command used in the configuration of the IPoGEC ensures fast switchover, with the delay in switchover being in milliseconds rather than seconds.

Supported Features for IPoGEC

  • IPoGEC supports both simple IP sessions and mobile IP sessions.
  • IPoGEC is supported over virtual local area network (VLAN) and subinterfaces.
  • IPoGEC is supported on all Ethernet SPAs, including 10-Gigabit Ethernet ports and 1-Gigabit Ethernet ports.

Configuring IP Sessions over Gigabit EtherChannel

SUMMARY STEPS

  1. configure terminal
  2. interface port-channel channel-number
  3. description string
  4. ip address ip-address mask [secondary [ vrf vrf-name] ]
  5. load-interval seconds
  6. lacp fast-switchover
  7. lacp max-bundle max-bundle-number
  8. service-policy type control policy-map-name
  9. ip subscriber {l2-connected }
  10. initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address }
  11. initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address }

DETAILED STEPS

  Command or Action Purpose
Step 1

configure terminal

Example:

Router# configure terminal

Enters the global configuration mode.

Step 2

interface port-channel channel-number

Example:

Router(config)#interface port-channel 1

Creates a port-channel virtual interface.

Step 3

description string

Example:

Router(config-if)#description GEC:1 interface towards switch
Adds a description to an interface configuration.
Step 4

ip address ip-address mask [secondary [ vrf vrf-name] ]

Example:

Router(config-if)#ip address 21.0.0.1 255.255.0.0
Removes an IP address from an interface.
Step 5

load-interval seconds

Example:

Router(config-if)#load-interval 30
Changes the length of time for which data is used to compute load statistics.
Step 6

lacp fast-switchover

Example:

Router(config-if)#lacp fast-switchover
Enables the LACP 1:1 link redundancy.
Step 7

lacp max-bundle max-bundle-number

Example:

Router(config-if)#lacp max-bundle 1
Defines the maximum number of active, bundled LACP ports allowed in a port channel.
Step 8

service-policy type control policy-map-name

Example:

Router(config-if)#service-policy type control BB_PMAP
Applies a control policy to a context.
Step 9

ip subscriber {l2-connected }

Example:

Router(config-if)#ip subscriber l2-connected

Enables Cisco Intelligent Services Gateway (ISG) IP subscriber support on an interface, and specifies the access method that IP subscribers use for connecting to the Cisco ISG on an interface.

Note 

The iWAG does not support the routed access method.

Step 10

initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address }

Example:

Router(config-subscriber)# initiator unclassified mac-address

Enables the Cisco ISG to create an IP subscriber session upon receipt of a specified type of packet.

Step 11

initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address }

Example:

Router(config-subscriber)# initiator dhcp

Enables the Cisco ISG to create an IP subscriber session upon receipt of a specified type of packet.

Configuring Member Links for IP Sessions over Gigabit EtherChannel

SUMMARY STEPS

  1. interface GigabitEthernet slot/subslot/port
  2. no ip address ip-address mask [secondary [ vrf vrf-name] ]
  3. carrier-delay {delay-seconds | msec milliseconds}
  4. lacp port-priority priority
  5. channel-group channel-group-number mode {active | passive }

DETAILED STEPS

  Command or Action Purpose
Step 1

interface GigabitEthernet slot/subslot/port

Example:

Router(config)#interface GigabitEthernet0/0/1

Enters the interface configuration mode for Gigabit Ethernet interface.

Step 2

no ip address ip-address mask [secondary [ vrf vrf-name] ]

Example:

Router(config-if)#no ip address
Removes an IP address from an interface.
Step 3

carrier-delay {delay-seconds | msec milliseconds}

Example:

Router(config-if)# carrier-delay msec 50

Sets the carrier delay on a serial interface. To achieve faster switchover from active to standby member link, the carrier delay value can be set to 0 ms.

Step 4

lacp port-priority priority

Example:

Router(config-if)#lacp port-priority 4000

Sets the LACP priority for a physical interface. IPoGEC currently supports 1:1 model, that is one active member link and one standby member link, which only requires choosing two different values for priority field to make sure one interface is active while the other is standby. The value set for the priority field shall match the value configured on the switch.

Step 5

channel-group channel-group-number mode {active | passive }

Example:

Router(config-if)#channel-group 1 mode active

Configures the interface in a channel group and sets the LACP mode.

Configuration Examples for IP Sessions Over Gigabit EtherChannel

Example: Configuring IPoGEC 


interface Port-channel1
description GEC:1 interface towards switch
ip address 21.0.0.1 255.255.0.0
load-interval 30
lacp fast-switchover
lacp max-bundle 1
service-policy type control BB_PMAP
ip subscriber l2-connected
  initiator unclassified mac-address ipv4
  initiator dhcp

Example: Configuring Member Links for IPoGEC 


interface GigabitEthernet0/0/1
no ip address
carrier-delay msec 50
lacp port-priority 4000
channel-group 1 mode active

interface GigabitEthernet0/0/2
no ip address
carrier-delay msec 50
lacp port-priority 3000
channel-group 1 mode active

Additional References

Related Documents

Related Topic

Document Title

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

iWAG commands

Cisco IOS Intelligent Wireless Access Gateway Command Reference

MIBs

MIB

MIBs Link

No new or modified MIBs are supported by this feature.

To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

Technical Assistance

Description

Link

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Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for IP Sessions over Gigabit EtherChannel

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1. Feature Information for IP Sessions over Gigabit EtherChannel

Feature Name

Releases

Feature Information

IP Sessions over Gigabit EtherChannel

Cisco IOS XE Release 3.9

The IP sessions over Gigabit EtherChannel (IPoGEC) feature enables you to add the Link Aggregation Control Protocol (LACP) functionality for IP sessions.

In Cisco IOS XE Release 3.9S, this feature was implemented on the Cisco ASR 1000 Series Aggregation Services Routers.