[c-nsp] Cisco 6506E 4Byte ASN IOS Support

Mark Tinka mark.tinka at seacom.mu
Fri Apr 8 09:58:31 EDT 2016

On 8/Apr/16 12:23, Gert Doering wrote:

> OTOH we don't do "truly full" routes on the XL boxes either (stripped
> down by a lot of /23 and /24 deaggregates from other regions), so they
> are still mostly usable - wouldn't run a "full full!" table on Sup720s
> anymore today.  BGP scheduler is too bad for the slowness of the CPU
> (100% CPU is not something I worry about - that's what the CPU is 
> there for :-) - but 100% CPU due to one BGP neighbour sending in tons
> of updates should never *ever* cause flapping on other BGP neighbours 
> due to missed keepalives)...

When we used to run XR 12000's back in the day under IOS 12.0, I was
amazed by this.

The CPU ran at 100% and logged "CPU hog" forever, but neither IS-IS, BGP
nor LDP sessions (90% of which had full BGP feeds) ever dropped.

Still amazes me today, especially when pings and SSH access to the
routers was sluggish as mad...


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