About hrtendrup

hrtendrup · 11-25-2025

TL;DR: no real question, just WTF, Cisco?Ok, first off, WTF Cisco?We bought some 9606 chassis with some C9600X-SUP-2s and put a VRF on them to support our 2-pod ACI IPN. ACI requires Bidirectional PIM to support BUM traffic over the IPN. The switches...

hrtendrup · 08-15-2025

We have a 2pod ACI deployment with a VCF environment in each pod. The VCF environments connect to ACI with their own L3Out in a user tenant. We have a single, spanned, L3Out that interfaces with the rest of our enterprise. We desire to have the route...

hrtendrup · 07-16-2025

I have an issue where I am receiving a route back from ACI that I have advertised to it. We send only a 0/0 route to ACI via 2 different sets of interfaces (vPCs). We've put both sets of interfaces into the same L3Out with the thought that there is s...

hrtendrup · 04-04-2025

I have the following faults I receive while trying to configure a routed sub-interface for an IPN in the infra tenantI do see that the interface is configured, but I cannot ping it locally. In contrast, I can ping the IPN interface to the other enter...

hrtendrup · 03-13-2025

In the past, different ospf processes on the same router would have required different router-ids:v 15.5 - IOS classic:Router(config-router)#do sho run | sec router ospfrouter ospf 101router-id 10.0.0.1network 10.0.0.1 0.0.0.0 area 1Router(config-rou...

hrtendrup · 10-30-2025

you can only have 2 nodes in a vpc domain (and probably they have to be in the same pod - though I've never tried otherwise). I'm not sure I understand what you're proposing on the upper side of that vpc oval. I have used back to back vPC as a metho...

hrtendrup · 10-29-2025

Remember that ACI does not participate in STP. Your port type on the 6ks probably should be shared, not point-to-point. The port then has to transition through the listen phase of STP before forwarding. That should be enough time for STP to propagate...

hrtendrup · 07-16-2025

Thank you for confirming. IMO, multiple VRFs would only complicate things. I think applying route control route-maps makes more sense. This is the subnet export policy that I ultimately settled on The only wonky thing here is how the route-map is bui...

hrtendrup · 04-09-2025

So the solution here was really simple. TAC just had me do a clean reload of the switch. I had done a couple of reloads already, but I didn't think to do a clean reload (I really should have... ). So, if a regular reload didn't work, try a clean relo...

hrtendrup · 04-06-2025

No dice. The internal pools for each pod are defined in some 10.x/16 ranges. The IPN transits are in 172.21.x.x/31 ranges

Member Since	‎07-10-2024 08:42 AM
Date Last Visited	‎12-08-2025 02:30 PM
Posts	13
Total Helpful Votes Received	3

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C9600X-SUP-2 - Bidir PIM not supported??

multi-pod transit routing

ACI stretched L3Out: routes readvertised back to core/enterprise

Cannot configure IPN interface

multiple ospf processes, single router-id

Re: Loop L2-Migration Legacy FabricPath to ACI

Re: Loop L2-Migration Legacy FabricPath to ACI

Re: ACI stretched L3Out: routes readvertised back to core/enterprise

Re: Cannot configure IPN interface

Re: Cannot configure IPN interface