Cisco ACI Preferred group, a pinch of inter-VRF leaking and L3Out
If an EPG is a provider for inter-VRF contract, then it cannot communicate within Preferred Group. However, shouldn’t the interaction between EPGs be governed by an explicit contract in the first place? Let’s test such a setup and see ourselves.
ACI VRF leaking
I have never met anyone who would claim that ACI is easy if marketing is put aside. ACLs or prefix-lists are covered in CCNA track; ACI contracts, however, have a dedicated white paper. One of the biggest mysteries for me was the process to implement inter-VRF contracts. Don’t get me wrong – it’s defined concisely, however, I always had difficulty understanding why those steps are required. Today I’d like to share a few observations on the topic.
Cisco ACI FTAG: trees inside
What do you know about underlay forwarding of BUM in ACI? If you’re familiar with FTAG concept, you might find a few interesting details on how exactly the trees are implemented.
How to update CIMC on old Cisco UCS
A few years back Flash Player support was removed from major web browsers. Although there were numerous reasons to do that, some people got stuck with unmanageable UCS console. The obvious way out – upgrade CIMC, but then engineers hit the chicken-egg problem since UCS is unmanageable. The workaround is relatively simple but somewhat tricky to come by.
Cisco ACI external L2 connectivity using EPGs and L2Out
Today I would like to share my experience with configuring external L2 connectivity in Cisco ACI. As the reader probably knows, there are 2 approaches so far: either consider external L2 segment as an EPG itself or configure an External Bridged Network object (aka L2Out).
Networking and IT 