Cross-site Layer2 VPN

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Sep 25th, 2009
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In the diagram i have 2 sites. In site 1 i have 2 PE devices with Vlan 3,33 in VTP database and couple of servers in both vlans. Need to extend both vlans broadcast domain to site 2 access layer switches. MPLS/LDP enable on PE's. I am assuming that without another access layer attached to PE3/PE4 with a tunk interface i cannot enable psedowire on PE3/PE3! since i need an (L3 - without an ip address) interface to enable xconnect on. Will vlan-base psedowire work? but will need a SIP card on the PE's since they are 6509!!

Any comment? Let me know you need more clarification..


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Laurent Aubert Fri, 09/25/2009 - 05:34
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Hi Francisco,

You're right. You need a SIP card for your uplinks if you want to apply the xconnect to an SVI interface.

You could try creating a trunk for VLAN 3 and 33 between PE3 and PE4. Assuming all the servers are connected to PE3 (there are 2x PE3 on your drawing ;-) ), you could apply the xconnect on PE4 trunk interface only to PE1 as primary and PE2 as secondary:

xconnect 10 encapsulation mpls

backup peer 20




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