7204VXR 802.1q tunneling

Unanswered Question

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.

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paolo bevilacqua Fri, 05/22/2009 - 10:12
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That is probably referring to VLAN over MPLS, probably not the only way you can resolve your connectivity.

Giuseppe Larosa Fri, 05/22/2009 - 12:14
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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


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 Fri, 05/22/2009 - 12:44
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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


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