Etherchannel EoMPLS

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Jul 26th, 2006
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I am implementing a Metro solution where I have two 7600s that are connected through an MPLS backbone. These 7600s have a point-to-point EoMPLS VC between them. NOTE: The 7600s do not have an OSM card, they are using the Sup720 ports to create de VC.

The 7600s are connected to the Metro Ethernet ring using an Etherchannel with two ports bundled.

Evrything is working ok, but sometimes the EoMPLS VC stop passing multicast traffic. The customer can send pings BUT their EIGRP ( routing between the CPEs is down.

Is there any known limitations regarding:

Multicast with EoMPLS and/or with Etherchannel?

Thanks in advance.

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aghaznavi Tue, 08/01/2006 - 11:26
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EoMPLS doesn't support Multicast traffic to passthrough

globalnettech Mon, 08/07/2006 - 04:32
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not knowing your exact configuration, have a look at the following bug:

CSCsc42814 Bug Details

Packets destined to IP addresses might not be send

over an EoMPLS pseudowire when the ES port is configured

as a trunk port.


This problem only occurs when using vlan based EoMPLS

and the vlan has been cleared from the trunk(s) on the ES ports


Interface vlan 50

no ip address

xconnect 123 encapsulation mpls


Interface GigabitEthernet 1/1/1

switchport trunk allowed vlan 1-49,51-4094

switchport mode trunk


Interface GigabitEthernet 1/1/2

switchport trunk allowed vlan 1-49,51-4094

switchport mode trunk


Allow the EoMPLS vlan on the trunk on the ES ports.



aretsu Mon, 08/07/2006 - 07:57
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Well, my configuration is a little bit different: I am doing PFC-based EoMPLS (without OSM), so I am doing the "xconnect" on a dot1q subinterface, not on a interface VLAN, and the VLANs area allowed on the trunks, BUT this problem appears when we have some outage on the network, like a backbone link flap or a crash (reload) on a PE-AGG (cat3550) connected to our 7600.

Thanks for your help.

ariela Wed, 09/27/2006 - 03:38
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if your problem is essentially the EIGRP multicast, please try with unicast ('neighbor' command).

Please let me know



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