[c-nsp] Which IOS do *you* use?

[Pete Templin]

>> (folks wrote...)
>>    I touch BGP on 3660s, 7200s, and 7500s and this is a common theme -
>> the customers I have are sticking to the 12.2 train. Is anyone seeing
>> different trends than this? I'd be curious to know if there are certain
>> 12.3 versions that act better than others, etc.
> 
> We run mostly on 7200s. 12.3 definitely still has some bugs. Esp. 
> with odd things like directly connected routes and networks 
> disappearing from the routing table when using CEF - at least until 
> you globally disable and re-enable CEF. However, there are some 
> scenarios where we have to use the 12.3 train. We run 12.2(20 
> something) wherever possible. We have some customers running super 
> new gear with 12.4T. Craziness I say! I'm not directly involved with 
> those clients at all, but I certainly wouldn't want to run that in 
> production yet. :)

For us, we're basically a three-platform shop:

GSR (core, upstream edge): 12.0(32)S, soon to be 12.0(32)S1.  Bleeding 
edge, I know, but we're "addicted" to route-map continue, and it's only 
safe in the outbound direction on 12.0(32)S (do not believe the release 
notes that suggest it worked in 12.0(31)S).  We've had great pains with 
MPLS TE on mix-n-match versions.

7507 (downstream edge, upstream edge): 12.0(27)S<newest>.  12.0(31) and 
12.0(32) are god-awful on 7507 - expect packet loss at 25% the traffic 
level you were comfortable with on 12.0(27)Sx.  I miss the improved CT3 
alarm reporting of newer 12.0S code, but oh well.

7200 (firewall): 12.2(29) mainline, FW feature set.  Bulletproof, no 
worries.  These were upgrades from 2620s; the 2620s didn't have the 
horsepower but otherwise had the stability we all desire.

pt