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From: ve7eje on 24 Mar 2010 15:46
I have a 2851 with an MW-ESW-16 card.
I can route just fine between either of the 2851's GigE interfaces and
the ESW-16's interfaces, but cannot get it to route between 2 ESW-16
interfaces.

Here are my port configs.

interface FastEthernet1/3
description LAN I/F
no switchport
ip address 10.255.253.254 255.255.255.0
duplex full
speed 10

interface FastEthernet1/15
description WAN access
no switchport
ip address 192.168.255.233 255.255.255.248
ip ospf cost 1
duplex full
speed 100

Am I missing something obvious?

Thanks
From: Tilman Schmidt on 24 Mar 2010 18:44
Am 24.03.2010 20:46 schrieb ve7eje:
> I have a 2851 with an MW-ESW-16 card.
> I can route just fine between either of the 2851's GigE interfaces and
> the ESW-16's interfaces, but cannot get it to route between 2 ESW-16
> interfaces.

If you are, as I believe, talking about an NM-ESW-16 then that's no
surprise. Those 16 ports are switch ports, not router ports. What's
surprising is that they accept an IP address at all.

I guess what you could do is create two VLANs, assign one port to
each, and then configure routing between the VLAN interfaces, like
you do on an ASA 5505.

HTH
Tilman
From: Doug McIntyre on 24 Mar 2010 22:03
ve7eje <ve7eje(a)gmail.com> writes:
>I have a 2851 with an MW-ESW-16 card.
>I can route just fine between either of the 2851's GigE interfaces and
>the ESW-16's interfaces, but cannot get it to route between 2 ESW-16
>interfaces.

You can't with an NM-ESW-16 card. Its a pure layer-2 switch. Its sort
of like bolting a 16-port 2950 switch onto your router. You can only
do layer-2 configs on the interface ports, and the only configs you
can do with the ports are VLAN membership, QoS settings, duplex,
speed, etc.

Anything layer-3, you'll have to VLAN trunk into the switch portion,
and you could setup layer-3 VLAN routing on the subinterfaces of your
L3 interface to the switch side.

Some of the newest/biggest switch on a blade are more like a 3570, but
this isn't one of them.

Here's the docs on it.

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gt1636nm.html

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