Re: [IOS 15.0] Any recommendation for IOS 15.0 ?

On 2010-01-03 14:21, Evan Weston wrote:
> If only using BGP and you want maximum stability and my job depended on it
> Id go for "Service Provider 12.4"

The problem with that reasoning is that 12.4 is already dead
and frozen. If you want to migrate from it in - let's say -
6 months, you will have essentialy none but 15.0 to choose
from. And going from 12.4 mainline to 15.0 mainline is quite
a leap.

> My reasoning for the mainline code is 12.4T has been hit and miss for me, if
> you are just using BGP it would probably be ok but for me when I've needed
> different sets of features to all work like MPLS, VPNs, ipsec, CoPP etc
> there always seems to be one feature that doesn't work right.

12.4T between 12.4(6)T and 12.4(15)T was undergoing major
rewrite of components like CEF, security, etc. If you
want 12.4T you're propably targeting 12.4(15)T10 or 12.4(24)T2.
Note the 12.4(15)T is already being phased out[1], and the
12.4(24)T also[2], but the 12.4(15)T will be supported longer.

> IOS 15 I think is too new to put on something mission critical.

It's directly off 12.4(24)T, and while the number of new features
is high, it's really quite stable - but there's only one rebuild of
it for the moment, so many people will scratch 15 off just because
of that.

I'd stick with 15.0(1)M1, do a baseline tests, and if something goes
wrong go back to 12.4(15)Tx (latest rebuild).

[1].http://cisco.com/en/US/prod/collateral/iosswrel/ps8802/ps6968/ps6441/ps8258/product_bulletin_c25-496283.html
[2].http://cisco.com/en/US/prod/collateral/iosswrel/ps8802/ps6969/ps1835/prod_bulletin0900aecd801eda8a_ps6350_Products_Bulletin.html

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