Re: [nsp] ISL/dot1Q trunks on 26xx

From: Siva Valliappan (svalliap@cisco.com)
Date: Mon Dec 11 2000 - 14:41:22 EST


the IDB limit on the 2600 is 300. if you need more IDBs, you might want
to look at a 3600. the 3620,3640 have 800 and the 3660 has 1400. but
then these are just theoretical limits. depending on what you wish to do,
you are often likely to run out of media bw, memory, cpu first.

regards
.siva

>
> The 300 IDB limit thing hasn't been fixed for quite a while. It's really
> memory and IOS-level dependent right now. If you max out the memory on the
> 2600, you should easily get beyond that in interfaces. I've got about 500
> running on a 3620 between VLANs and Frame sub-interfaces on one clients'
> router. There's a "show idb" hidden command, but unfortunately, I don't
> know any way of finding out the maximum for your configuration.
>
> Scott
>
> -----Original Message-----
> From: Andrew Smith [mailto:awsmith@rip.ops.neosoft.com]
> Sent: Monday, December 11, 2000 2:07 PM
> To: Charles Sprickman
> Cc: cisco-nsp@puck.nether.net
> Subject: Re: [nsp] ISL/dot1Q trunks on 26xx
>
>
> On 11-Dec-2000, Charles Sprickman wrote:
> > Hi,
> >
> > Does anyone know of the max number of subinterfaces one can put on an FE
> > port of a 2600 series router? I'm looking at about 200-400 with a fairly
> > light overall traffic load (less than 6 Mb/s aggregate).
>
> I believe that you are going to hit the max IDB limit on the 2600
> at 300 total interfaces (including subinterfaces).
>
> > Also, what's the general performance impact of doing trunking off of a
> > router?
>
> I haven't seen any significant impact in router performance by simply
> using dot1q or ISL subif's. I don't know much about the physical FE
> on the 2600's and how well it will operate as a "router on a stick"
> as in, how well it performs in full-duplex capacity.
>
> > Thanks,
> >
> > Charles
>
>
>
> ---------------------------------------------------------------------------
> ** Andrew W. Smith ** awsmith@neosoft.com ** Chief Network Engineer **
> ** http://www.neosoft.com/neosoft/staff/andrew ** 1-888-NEOSOFT **
> ** NeoSoft, Inc. An Internet America Company 1-800-BE-A-GEEK **
> ** "Opportunities multiply as they are seized" - Sun Tzu **
> ---------------------------------------------------------------------------
>
>



This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:23 EDT