Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 376
Important Points about Shared LAG State Tracking, Con LACP as Hitless
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www.dell.com | support.dell.com Figure 19-9. Viewing Status of a Failover Group Member R2#show interface Port-channel 2 Port-channel 2 is up, line protocol is down (Failover-group 1 is down) Hardware address is 00:01:e8:05:e8:4c, Current address is 00:01:e8:05:e8:4c Interface index is 1107755010 Minimum number of links to bring Port-channel up is 1 Port-channel is part of failover-group 1 Internet address is not set MTU 1554 bytes, IP MTU 1500 bytes LineSpeed 1000 Mbit Members in this channel: Gi 1/17(U) ARP type: ARPA, ARP Timeout 04:00:00 Last clearing of "show interface" counters 00:01:28 Queueing strategy: fifo Note: The set of console messages shown in Message 1 appear only if Shared LAG State Tracking is configured on that router (the feature can be configured on one or both sides of a link). For example, in Figure 19-8, if Shared LAG State Tracking is configured on R2 only, then no messages appear on R4 regarding the state of LAGs in a failover group. Important Points about Shared LAG State Tracking • This feature is available for static and dynamic LAGs. • Only a LAG can be a member of a failover group. • Shared LAG State Tracking can be configured on one side of a link or on both sides. • If a LAG that is part of a failover group is deleted, the failover group is deleted. • If a LAG moves to the down state due to this feature, its members may still be in the up state. Configure LACP as Hitless c e Configure LACP as Hitless is supported only on platforms: LACP on Dell Force10 systems can be configured to be hitless. When configured as hitless, there is no noticeable impact on dynamic LAG state upon an RPM failover. Critical LACP state information is synchronized between the two RPMs. Configure LACP to be hitless using the command redundancy protocol lacp from CONFIGURATION mode, as shown in Figure 19-10. 376 | Link Aggregation Control Protoco
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