[c-nsp] 3550 layer 3 switch replacement for v6

[Seth Mattinen]

On 12/9/2010 12:54, Jon Lewis wrote:
> I need to start looking at replacing 3550-48 switches with something
> comparable that supports ipv6.  I tried using feature navigator, but the
> info it was giving me was so suspect I won't even bother repeating it. 
> My impression from past looks into this issue is that the 3560-48TS
> (which actually went end of sales earlier this year) is a comparable
> switch to the 3550, does ipv6 in hardware, but has far less flexible per
> port policing, which will require a total redesign of our customer port
> limits.
> 
> I'm wondering if there are any major surprises with the 3560 when you
> enable ipv6 routing and ipv6 ospf?  I know doing so cuts the supported
> number of routes in half.  Also, we've kind of been abusing the 3550s,
> by running them with generally most of the ports in layer 3 mode.  The
> "recommended" number of routed interfaces on a 3550-48 is only 8!  Can
> we get away with running 48 dual-stack layer 3 ports on a 3560-48TS?
> 

I have some etherswitch service modules (3750 in a NME) running IPv6
with OSPF just fine. Other than a /128 ACL requiring ff:fe in the right
spot (someone detailed why either here or NANOG when I complained about
it previously) to store it in TCAM, I don't have any major complaints
with their IPv6 support. I'm not doing anything fancy, just pushing
packets with anti-spoofing ACLs.

I don't do any policing with them though, and that's really where you
will probably be annoyed the most.

~Seth