Just wondering what the current thoughts are on the following common problem .......
- Have 3 x L3 distribution pairs (#1, 2 and 3) with a number of fully redundant L2 access switches off each
- Distributions are connected via a L2 core
- VLAN X is root/root secondary on Distribution Pair 1. Need to extend the same VLAN X to L2 access switches hanging off Distribution Pair 2 and 3.
- Single Mode fiber between distributions. Multimode fiber between access and distribution.
Do I simply connect a fiber from Distribution Pair 1 to both Distribution Pair 2 and 3 and extend down to access via trunk? This is obviously possible but not allowing for a clear demarcation and could cause instability from one network to extend to another.
Do I play it safe and put in a L2 aggregation switch (with fiber ports) beside each of Distributions 2 and 3 and in turn have dedicated (parallel) access switches for that VLAN X. This is a waste but would probably less of a risk than the first option.