09-12-2017 10:50 PM - edited 03-08-2019 12:00 PM
Just wanted to know what is the best practice in terms of reusing vlan numbers in different distribution blocks in a 3 tier network. ie layer 2 from access to distribution and layer 3 between distributions and core.
access--L2---distribution1---L3---core---L3---distribution2---L2--access
Is it best practice to use the same vlan numbers (obviously they will have a different ip subnet) in each of the 2 distribution blocks? Say distribution1: vlan 10 mgmt & vlan 20 data and distribution2: vlan 10 mgmt & vlan 20 data.
09-13-2017 12:17 AM - edited 09-13-2017 12:18 AM
Hi there,
If it brings uniformity to your network topology then it can only be a good thing. I certainly have employed the same practice at remote sites, but safe in the knowledge that these Layer2 segements will never meet.
Doing the same, from what you describe on a campus network is slightly more risky. So long as the existing core-distribution L3 links never start carrying these shared VLAN IDs your design will be fine. I assume you have used routed interfaces to try and mitigate accidental trunking?
cheers,
Seb.
09-13-2017 12:32 AM
09-13-2017 06:38 AM
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