[c-nsp] Trunked links over EoMPLS

[sthaug at nethelp.no]

> 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.

Or, since EoMPLS was mentioned, he may simply want a "port mode" Martini
tunnel. Connect a VLAN trunk to an MPLS PE router, on the PE router
configure xconnect at the port (interface) level, not at the VLAN level.

We have several of these, and they work fine - even between Cisco and
Juniper :-)

Steinar Haug, Nethelp consulting, sthaug at nethelp.no


> 
> 
> 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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