Wired Intelligent Edge (Campus Switching and Routing)

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8320 CX-OS 10.01 - VSX L3 Routing

I have two 8320's configured with VSX and set up an LACP LAG / ISL. Both peers are showing up and w/o issue. I can ping everything on the second switch, but the second switch is unable to ping any IPs in the first switches route table that were learned via OSPF. Is this is a limited functionaltiy of VSX? I was under the impression that they shared route tables and traffic would just route over the ISL to the corresponding interface w/ the OSPF adjacency then out to the remote site. I can see the routes in vsx ip route table, but switch 2 seems to know nothing about it and says network unreachable when pinging. 

 

 


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MVP Guru

Re: 8320 CX-OS 10.01 - VSX L3 Routing


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MVP Guru

Re: 8320 CX-OS 10.01 - VSX L3 Routing

Hello,

 

The routing table is not shared. VSX is a cluster technology with independant control plane. Each VSX node has to run routing protocol with their own router-ID. So, considering OSPF for instance, primary has adjacency with upstream routers as well as secondary. Likewise, you define a transit VLAN between primary and secondary to ensure IGP continuity in case primary or secondary upstream L3 link to routers fails. 

 Capture3.JPG

 

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New Contributor

Re: 8320 CX-OS 10.01 - VSX L3 Routing

So in a collapsed core topology where I wanted to run active-gateway and vsx on just two switches with an OSPF link only coming into one switch; I would need an OSPF adjacency between the two switches on top of vsx? 

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MVP Guru

Re: 8320 CX-OS 10.01 - VSX L3 Routing

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