[nsp] ISP IOS choice / SAA

[Gert Doering]

Hi,

On Tue, Dec 23, 2003 at 05:04:44PM -0600, Troy Rader wrote:
> I am needing to get a sense of what version of IOS ISP's who use Cisco
> equipment are running, 12.0 or 12.2.  

This question is "a bit" broad.  It depends very much on what hardware
you have, what features you use, and so on.

On our 7200s, we use 12.0(21)S7 or older versions, or 12.2(x)S.

We never made the step from 12.0(21-or-before) to 12.0(22)S with the
merge of 12.0ST - not much to gain for 7200 (no IPv6 here), but lots
of new and exciting "things".

Recently, we have started migrating the 7200s to 12.2S, to be able to
do IPv6 on the 7200s.  12.2S is mostly fine, but the feature disparity
between 12.0S and 12.2S is highly annoying (and the fact that lots of
stupid things that have been fixed in 12.0S reappear in 12.2S, like
the famous "show int counters getting stuck" bugs).

On our single 7500, we're still with 12.0(21)S7.

No GSRs here.

On the smaller platforms, we use 12.0(high), 12.1(high) or 12.2(high),
depending on hardware support and feature need.  We try to avoid IOS
versions with letters in them where possible, and we try to avoid IOS
versions with subrelease numbers < 10 (like "12.3(x)").

We use EIGRP, OSPF, BGP for IPv4, PIM-SM/MSDP for IPv4 multicasting, BGP 
and RIPng for IPv6.  No MPLS or SAA anywhere.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de