On Monday, June 23, 2014 11:36:21 AM Paul S. wrote: > I haven't seen the REs die due to any direct faults > either, ever. > > However, they do exhibit issues with fw corruption and > the like on abrupt power loss, and co. > > In my opinion, you do not get redundant REs for it to be > immediately useful, you keep them for when s* really > hits the fan. > > Similar analogy to A+B power / network.
I've gone single control plane on Layer 2-only core switches. Use-cases are simple enough for that. If a box is doing IP, it needs dual control planes if the hardware supports it, IMHO. Until recently, I ran single RP's on Cisco ASR1006's which did NAT44/NAT64, as redundant RP's created split-brain scenarios prior to support for Intra- and Inter-Chassis Stateful redundancy. That's about the only corner case I can think of where you don't want a redundant control plane on a capable IP box. Mark.
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