REP MSTP Compatibility mode on Cisco 4500 ????
Hi all.
I having issue when deploy REP bethween Cisco 4500 Sup 7E/6LE with ASR 9000.
Follow the guide http://www.2mul.com/en/US/docs/routers/asr9000/software/asr9k_r4.0/lxvpn/configuration/guide/lesc40book.pdf , page 319 then ASR 9000 work at REP Access Gateway is supported when the access device (cisco 4500) interfaces that connect to the gateway devices are configured with REP MSTP Compatibility mode.
How to config REP MSTP Compatibility mode on interface of Cisco 4500 ??????????
How to config REP Access Gateway on ASR 9000 ???????????
Please help!
Thanks.
Tran,
you can configure REP-AG on the A9k as follows:
spanning-tree repag
int g0/0/0/0.1
int g0/0/0/0.1 l2trans
encap untagged
Note that REP-AG is not full rep, we only trigger on the TCN from the rep ring and invoke a mac flush then.
Because the 9k needs to be at the head of the ring you need to configure the following on your peer:
rep edge no-neighbor
and the compatibility mode is done via:
rep stcn stp
Finally, if the 2 endpoints of the rep ring are on the same device, you may want to put the encap untagged EFP's into an XCON or BD, if the 9k's are remote a PW to make sure that you can transport the TCN's from one ring point to the other if need be in specific design scenarios.
xander
sr Tech Lead ASR9000
CCIE
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