7204VXR 802.1q tunneling

robert.mason · ‎05-22-2009

Is there an IOS update that will allow me to provide vlan tunneling on an ethernet port of a 7204VXR? I do see that the "Software Advisor" does say that vlan tunneling is available in an IOS for the 7200 series router, but all I have been hearing is that the option may be there, but the hardware does not support it. I have NPE-225 at CPE-7204VXR that will tunnel customer vlans into my network vlan. I hope.

paolo bevilacqua · ‎05-22-2009

That is probably referring to VLAN over MPLS, probably not the only way you can resolve your connectivity.

Giuseppe Larosa · ‎05-22-2009

Hello Robert,

VPLS is not supported but you shouldn't need it. IF all you need is a point-to-point tunnel over an IP network I would suggest you to investigate L2TPv3 it can be very effective and can be per vlan specific (you can decide what vlans are carried over the L2TPv3 tunnel on a per subinterface basis).

Given your hardware you should be aware that this solution is good only for a moderate amount of traffic.

see

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gtl2tpv3.html#wp1043059

Hope to help

Giuseppe

robert.mason · ‎05-22-2009

This does help. I was hoping that I could get away from defining each incoming vlan on its own subinterface. Basically, we are tunneling our customer's vlans across our provider network and they have a range of about 200 vlans. It is too bad that the 7200 does not yet do q-in-q on its ethernet ports. I do see the command is there is some IOS versions, but from what I understand it is not yet supported. Is this correct?

Giuseppe Larosa · ‎05-22-2009

Hello Robert,

you probably mean stacked vlans

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/qinq.html

Someone has reported to have used it on C7200 with late 12.4T but they had better processors.

However, 200 Vlans in a C7204VSR with only an NPE 225 let me say that even if supported you are likely to face performance issues on the box.

It is not only a question of how long it takes to configure but 200 Vlans can use all 7200 resources just to propagate broadcast traffic !

Hope to help

Giuseppe