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Ethernet over MPLS

Hi Everybody!

I have question: when a VC is configured on an interface, does routing protocols are disabled on this interface?

Thank You,

Agata

2 REPLIES
Cisco Employee

Re: Ethernet over MPLS

Hi,

AFAIK, xconnect cannot be configured on an interface with IP address.

If you try xconnect with IP address configured on an interface, error message will be seen as below,

R1(config-subif)#int e0/2
R1(config-if)#ip addr 1.1.1.3 255.0.0.0
R1(config-if)#xconnect 1.1.1.1 123 encapsulation mpls
Incompatible with ip address command on Et0/2 - command rejected.
R1(config-if)#no ip addr 1.1.1.3 255.0.0.0           
R1(config-if)#xconnect 1.1.1.1 123 encapsulation mpls
R1(config-if-xconn)#exit
R1(config-if)#

So obviously it cannot participate in routing protocol as it doesnt have IP address.

Regards,

Nagendra

Hall of Fame Super Silver

Re: Ethernet over MPLS

Hello Agata,

you can have routed subinterfaces, EoMPLS subinterfaces, subinterfaces in VRF under the same main interface but a single interface cannot be at the same a L2 facing point and a L3 interface as Nagendra has showed.

Using subinterfaces can give a chance to provide L2 and L3 services for different vlan-ids

Hope to help

Giuseppe

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