2 messages in net.nether.puck.cisco-nsp[c-nsp] cat4k, module 4548, architect...
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Jochen KaiserJan 10, 2005 9:55 am 
lis...@hojmark.orgJan 10, 2005 2:34 pm 
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Subject:[c-nsp] cat4k, module 4548, architecture, backplane performanceActions...
From:Jochen Kaiser (Joch@rrze.uni-erlangen.de)
Date:Jan 10, 2005 9:55:43 am
List:net.nether.puck.cisco-nsp

Hi,

I've a problem with cat4k architecture.

We are using a Cisco 4548 module. The board has 48 10/100/1000 Mbit ethernet ports. Each eight ports have a shared 1 Gigabit connection to the backplane. The total backplane bandwidth per module/blade is 6Gbit (12 Gbit FD). The ports are combined in modulo 8 ranges: ... first gigabit connection serves ports 1 to 8 and so on.

How is the communication between ports:

a) 1 and 2? b) 1 and 9?

Is there a switch logic on the board which grants short paths (without using the backplane (except for some lookups)) or is this communication in case a) and b) going over the backplane?

regards, Jochen

-- Dipl. Inf. Jochen Kaiser, GPG 0x3C93A870, phone +49 9131 85-28681 Network Administration mailto:joch@rrze.uni-erlangen.de Regionales Rechenzentrum Universitaet Erlangen-Nuernberg, Germany http://ipv6.rrze.uni-erlangen.de/~unrz111 private:jnka@gmx.de