Verifying feature status
For service continuity during ISSU, configure the following feature settings:
Feature | Setting requirements |
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GR/NSR | Enable GR or NSR for protocols including LDP, RSVP, OSPF, ISIS, BGP, and FSPF. |
BFD | Disable BFD for protocols including LDP, RSVP, OSPF, ISIS, RIP, BGP, VRRP, and NQA. |
Ethernet link aggregation | Use the long LACP timeout interval (the lacp period short command is not configured) on all member ports in dynamic aggregation groups. |
IRF | Configure IRF bridge MAC persistence as follows:
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For an ISSU Reboot upgrade on a single-member IRF fabric, also verify that the following features are disabled:
Feature | Remarks |
---|---|
Spanning tree feature | If the spanning tree feature is enabled, service discontinuity might occur during the upgrade because the feature advertises the network topology change. |
Dynamic Ethernet link aggregation | During an ISSU reboot, only static aggregation is supported, and dynamic aggregate interfaces might not be able to provide services. |
CFD | If CFD is enabled, the CFD CC feature will be disabled during an ISSU reboot, which results in traffic abnormality. |
DLDP | If DLDP is enabled, the peer device might consider a link a unidirectional link and shut down the port because it cannot receive probe packets. |
Loop detection | If loop detection is enabled, the peer device might enable looped ports because of false loop removal detection. |