[c-nsp] Reply:RE: why vpls need some special line cards tosupport

[Arie Vayner (avayner)]

There are 3 options to configure EoMPLS on 6500/7600:
- Port mode: xconnect is configured directly on the port
- Sub-interface mode: xconnect is configured on a subinterface
(gig0/0.100), using dot1q VLAN to match traffic
- SVI (interface vlan): xconnect is configured on SVI

The first 2 options do not require special HW, and do not perform MAC
learning (they do consume an internal VLAN, and the VLAN used for the
sub-interface is globally used on the device)
The SVI option requires a WAN card (SIP/ES) on the core facing side, and
it would perform local MAC learning, as the SVI can be attached to
multiple local interfaces.

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Phil Mayers
Sent: Wednesday, January 11, 2012 16:18
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Reply:RE: why vpls need some special line cards
tosupport

On 11/01/12 13:56, ying-xiang wrote:
> Hi Arie,
>
>
> EoMPLS dosen't need to perform MAC learning or MAC look up for 
> forwarding packets.so EoMPLS function can be implement even without a 
> advanced egress line card.is that right?!

Yes, exactly right.
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