Considering recent posts on IRF, there was a need to get some availability with the more cost effective switches from the Aruba / ProCurve world. I did some research on that and luckily there are more than one option today with this platform – at least the 5400s (…) and in my case 2930s support this by default.
Considering redundancy you basically consider two types of high availability and these cover Layer 2 availability, traditionally suited with link aggregation which conventionally does not span several chassis, and Layer 3 availability for a redundant default gateway service.
In a traditional design, then with a couple of switches (at least four), you configure VRRP for L3 redundant default gateway service, LACP – link aggregation groups for L2 Continue reading →
Some time ago, I posted on the configuration of an IRF independent resilient fabric with the HPEFlex Fabric FF5700 datacenter switches. During the operation some things arose to my attention which either have been corrected or perhaps not necessarily clear from the first place.
1.) Activate MAD
There needs to be a mechanism to detect multiple actives. This could be considered something like a quorum for the switch-cluster, intended to prohibit split brains. In my case I preferred to do so with LACP. This brings MAD (Multiple Active Detection) to the layer two and is rather simple. It should be configured on an appropriate Bridge Aggregation Group – resulting in an configuration like:
port link-type trunk
port trunk permit vlan all
link-aggregation mode dynamic
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