[c-nsp] IOS Recommendation | 7600/RSP720-3CXL

[Richard A Steenbergen]

On Wed, Aug 12, 2009 at 02:21:43PM -0400, Rodney Dunn wrote:
> If you are going to move go to the latest SRB rebuild on Cisco.com.
> 
> There were a ton of fixes in the early SRB releases due to a huge 
> quality push on that throttle.
> 
> SRC and SRD simply have less field exposure.

I can actually name quite a few major networks who are running SRC in
very widespread deployment, including mine, and a couple of tier 1's.
From what I've seen this is actually the train with the most service
provider field exposure, and amazingly enough (not trying to jinx it
here) SRC4 has been solid for us so far.

We did hit quite a few serious issues in the earlier builds, things like
BGP announcements which stopped working until you deleted and readded
the neighbor, rsvp that didn't actually reserve bandwidth, many SNMP
counter issues, a runaway CPU loop in the BGP process, etc, but they've
all been fixed in SRC4. The biggest issue we've encountered so far is
that when you reload the router to upgrade to SRC4 the "switchport trunk
allowed vlan" list on trunk ports tends to drop vlan IDs during the 
reboot (particularly on port-channels and port-channel members, causing 
port-channel desyncs). Comparing the before and after in rancid will 
save you a lot of grief, we've seen this happen at least a dozen times 
now so it definitely appears to be an SRC4 specific issue.

-- 
Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)