Can someone talk me through their thoughts on the pros and cons of terminating an internet or mpls circuit on some catalyst 9300's vs terminating those same circuits on an ISR/ASR? It seems to be a pretty divided camp as ive seen both done out in the wild but i dont ever get really good reasons as to why either side has chosen their path. Im curious what this communities thoughts are on the subject.
From my perspective, a newer switching platform like a Cat9k w/ proper advantage licensing will do "full" BGP and while it may not have enough memory, though I would need to check, to consume a full internet routing table, it can certainly perform the same BGP functions as an ISR/ASR. Leaving out things like voice/multicast as I am not sure on the deficiencies the cat9k platform may have with those, what other reasons do folks terminate a circuit onto a switch? If we back out the SDWAN conversation then are we witnessing the slow death of the branch router as switching platforms today are more than capable of accomplishing the task?
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