[c-nsp] 2800's and an extra FE port..

[Rodney Dunn]

On Thu, Oct 20, 2005 at 11:04:29AM -0300, Tim Devries wrote:
> 
> Hi,
> 
> Funny thing I looked this up this morning and according to:
> 
> http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guid
> e09186a00802c6bb6.html
> 
> "Cisco EtherSwitch HWICs are 10/100BaseT Layer 2 Ethernet switches with
> Layer 3 routing capability. (Layer 3 routing is forwarded to the host, and
> is not actually performed at the switch.). Traffic between different VLANs
> on a switch is routed through the router platform. Any one port on a Cisco
> EtherSwitch HWIC may be configured as a stacking port to link to another
> Cisco EtherSwitch HWIC or EtherSwitch network module in the same system. An
> optional power module can also be added to provide inline power for IP
> telephones. The HWIC-D-9ESW HWIC requires a double-wide card slot."
> 
> I'm still a bit confused about the "(Layer 3 routing is forwarded to the
> host, and is not actually performed at the switch.)" part.  By host I am
> assuming it means the routing engine, but I have no idea if this is correct.

I think you are corrrect. When they say "host" they mean the main 
CPU. "host" there is a bad choice of words probably.

It's because the L3 features are applied by IOS on the interface (SVI)
unless you had one of those modules (I forget which one it is) that
has L3 forwarding capability on the daughter card. It would be like
a 2950 switch getting power from the main chassis.


Rodney

 
> 
> Tim
> 
> -----Original Message-----
> From: Steve Wright [mailto:steve.wright at visp.me.uk] 
> Sent: Thursday, October 20, 2005 10:53 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] 2800's and an extra FE port..
> 
> Hi all,
> 
> I'm currently trying to find the best way to gain an extra fast ethernet
> port for either a 2811 or 2851..
> 
> The GigabitEthernet port (HWIC-1GE-SFP) seems outrageously priced (as per
> Cisco kit I know ;) )
> 
> However, I've had a thought on using a HWIC-4ESW and creating dot1q sub
> interfaces on one of the main layer 2 interfaces then trunking to the switch
> module for my layer 3 stuff?
> 
> Can anyone who has looked into this or has any other thoughts let me know
> their opinions as I'm relatively new to the 2800 range?
> 
> Thanks,
> 
> S
> 
> 
> 
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