[c-nsp] Cisco 3550 maximum number of routable interfaces limit?

[Matthew Crocker]

We use a 3550 to aggregate our T1 traffic.  We have a Seranoa WANPort 
(IPeX) which terminates channelized DS-3s into 802.1q VLANs.   We take 
the GigE from the Seranoa and run it into a 3550.  The 3550 config has 
a 'interface VLAN' for each T1 customer, with ip subnet and static 
routes assigned.  The 3550 is a member in our OSPF area 0 announcing 
customer routes.   We have about 30 'Interface vlan' configured right 
now passing about 16mbps of traffic without any problems.  CEF is 
running but I heard after 8 interfaces everything is punted to process 
switched.   We are at 1% CPU so I'm not sure about that either.  I plan 
on adding another 100 or so interfaces to this box, hopefully it 
doesn't melt on me

-matt




On Feb 9, 2005, at 8:43 AM, Adam Greene wrote:

> This has been quite useful to me, too. We shied away from purchasing 
> 3550's
> a while back because we were looking to put up to 256 SVI's on whatever
> layer 3 switch we got. We went with the Extreme Summit series instead
> (200-24 and 48si).
>
> However, it's sounding like even with 256 SVI's, if I keep the routing 
> table
> small (for example, our Extremes only have about 50 right now), we 
> could
> still consider 3550's. In fact, since we may need to upgrade our
> Summit200-24 soon, this puts the 3550 back on the map for me.
>
> Anyone else doing lots of SVI's in an OSPF environment with relatively 
> few
> routes?
>
> ----- Original Message -----
> From: "Marcel Lammerse" <lammerse at xs4all.nl>
> To: "cisco-nsp" <cisco-nsp at puck.nether.net>
> Sent: Tuesday, February 08, 2005 12:26 AM
> Subject: Re: [c-nsp] Cisco 3550 maximum number of routable interfaces 
> limit?
>
>
>> Thanks all, I know a lot more abot 3550 performance now :-)
>>
>> Marcel
>>
>> On Feb 7, 2005, at 9:46 PM, Mark Boolootian wrote:
>>
>>>
>>>> show sdm prefer only shows you the current template and numbers from
>>>> the
>>>> published tables.  I'm more interested in tcam resources actually
>>>> used/available on the live switches.
>>>
>>> You and me both.  Surely you know about 'show tcam...'.  I would
>>> prefer an interface that allowed me to say 'show tcam statistics'
>>> providing a matrix of utilization stats (including stats on routes).
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>>
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