[c-nsp] Trunked links over EoMPLS

[McCallum, Robert]

Chris,  this is called QinQ.  However,  all that you can do is a dot1q trunk
between the devices i.e. NO ISL.  ISL doesn't work (or at least didn't a
week ago when we tested it).  If your switch is a 3550 the config looks like
this.


int fast0/1
switchport dot1qtunnel
switchport trunk allowed vlan blah blah blah.
switchport access vlan xx (this is the vlan number for your network)

you can then do l2protocol tunnel cdp,stp or vtp.  This command will allow
total transparency.


BTW if spanning tree is enabled for vlans then the customer shall see the
vlan that you need to use to encapsulate their packets into.

HTH

Robert McCallum 
CCIE #8757 R&S


> -----Original Message-----
> From: Chris Roberts [mailto:croberts at bongle.co.uk] 
> Sent: 04 November 2004 14:02
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Trunked links over EoMPLS
> 
> 
> Heya,
> 
> I have a customer with a bunch of VLANs on a switch - I want 
> to enable a trunk link on this switch and carry the entire 
> trunk across a point-to-point L2VPN to a remote switch which 
> will also have trunking enabled. Is this possible? The 
> documents on Cisco seem to indicate that I need to have 
> stacked VLAN processing and such, is this necessary? I don't 
> want to do anything complicated like send different VLANs to 
> different places and such, just encapsulate the entire L2 
> frames including 802.1q / ISL headers.
> 
> Cheers,
> Chris.
> 
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