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Fabric ISIS adjacencies

Fabric ISIS adjacencies

Andre_Brits_Kan
Contributor II
Hi Community

Some more fabric questions from my Fabric lab.

I have the following setup:

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-93167-kg898x-Diagram_inline.png



All switches in the lab is running the latest 7.1.0.0 GA code.

If I look at the ISIS adjacencies I see that all the adjacencies are active and working:

Core 1:

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-64934-1y4i2nh-Adj_1_inline.png



Core 2:

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-88235-bpram6-Adj_2_inline.png



Core 3:

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-31690-uffs88-Adj_3_inline.png



Core 4:

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-43160-1mcjgre-Adj_4_inline.png



I now add additional redundant links and have a look at the adjacencies again.

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-3902-1sckd2h-Diagram_2_inline.png


Redundant links to or from the VSP 4850's to either another VSP 4850 or VSP 8404 is added to the list but in a backup state. This is expected.

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-77000-1pugzu2-Diagram_3_inline.png



However backup links between the two VSP 8404 nevers passes the INIT state

64d10e9f5b544cb4ac0ee5e9e5c56377_RackMultipart20181101-72714-1bode74-Diagram_4_inline.png



When I remove the primary links the links that was stuck in "INIT" moves to active.

Both the 48xx and 84xx is running the same code.

Why does the 84xx not move to backup?

Thx

1 REPLY 1

Ed_Uhler
Extreme Employee
IMHO - It may be best to have the two links between the nodes configures as MLT/LAG, so that traffic can be hashed and provide that extra redundancy rather than using the Active/Standby approach.

Reminder: You should remove the following from each designated NNI port.
no spanning-tree mstp
vlan members remove 1

Reminder: You need to add the following for each designated NNI port.
encapsulation dot1q

Reminder: You need to add the NNI interfaces to the ISIS area.
vsp4k:(config-if)# isis
Adds the interface to isis

vsp4k:(config-if)# isis spbm 1
Establishes this interface as part of the SPBM Instance 1

vsp4k:(config-if)# isis enable
enables the isis on the interface.

vsp4k:(config-if)# exit
vsp4k:(config-if)# save config or write mem



GTM-P2G8KFN