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VSP same platform VLAN ID's, but different subnets, on same cluster?

VSP same platform VLAN ID's, but different subnets, on same cluster?

Anonymous
Not applicable
Hi,

So here is the problem I am trying to solve.

Have a cluster pair in location A and another cluster pair in location B. 

These are being replaced by VSP's and fabric. Each location has a local VLAN 10, but different subnets, say:

  • Location A VLAN 10 = 10.10.10.x/24
  • Location B VLAN 10 = 10.10.20.x/24

These VLANs can coexist within the fabric by simply putting them into different i-SIDs.

The issue is the design requires that both subnets remain routable should any one location fail.

Although I could create flex-uni's (as an example) to get the VLAN / I-SID where ever I want, I can only create one VLAN 10 platform per cluster i.e:

  • Location A houses VLAN 10 as platform VLAN for 10.10.10.x/24
  • Location B houses VLAN 10 as platform VLAN for 10.10.20.x/24
So this would mean if any one location fails, the VLAN 10 / i-sid associated to that location looses its routed interface and is no longer reachable.

So wondering if anyone has any bright ideas, or can maybe point out something obvious I might be missing.

Many thanks in advance.
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