On Tuesday, July 02, 2013 05:09:44 PM Julien Goodwin wrote: > Other than the amount of CPU capacity on the MX80 (which > has been done to death here) do you really have RE's > fail often enough to be a problem?
When we had chassis-based core switches, we slowly moved away from dual control planes to a single one, given the work being done (Layer 2 switching only) and the reliability that has gone into the platforms over time. So much so that now, our core switching happens on 1U chassis that have multi-rate Ethernet ports, i.e., Cisco 4500-X or Juniper EX4550. The only time we'll ever see chassis-based core switches again is if we're doing some kind of data centre core aggregation in a specific PoP, if ever, since routers are now either small and powerful or big and powerful enough that the days of needing 300 to serve your edge in one PoP are long gone. On the routing side, however, we've had cases where routers have been rock solid for years, and others have had a bad batch of RE's, nearly all at the same time. Moreover, for software upgrades (even in planned windows), it's always good to have a secondary RE to which you can dump traffic until you complete an upgrade cycle on the other. Mark.
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