08-10-2015 08:47 AM
hi all, i am studying an integration in the following scenario:
7609_1 ----- 7609_2
| |
ASR9K ASR9K
\ /
ASR920
In the specific:
1) in the ASR920 i have configured a l2vpn vpls + bridge-domain (i have several devices attached to access switch ASR920):
l2vpn vfi context management100
vpn id 100
autodiscovery bgp signaling bgp
ve id 1
rd 1111:100
route-target export 1111:100
route-target import 1111:100
no auto-route-target
bridge-domain 100
member vfi management100
2) the ASR9K (i paste the config of one ASR, the other is the same):
l2vpn
bridge group management100
bridge-domain management100
interface TenGigE0/0/0/16.100
!
vfi management100
vpn-id 100
autodiscovery bgp
rd 1111:100
route-target import 1111:100
route-target export 1111:100
signaling-protocol bgp
ve-id 3
spanning-tree pvrst management100
vlan 100
!
interface TenGigE0/0/0/16
where TenGigE is the uplink to 7609_1 or _2. this interface is configured this way:
interface TenGigE0/0/0/16.100 l2transport
encapsulation dot1q 100
rewrite ingress tag pop 1 symmetric
3) the two 7609s are running rapid-pvrst in the cross between them and to the ASRs. the first 7609 is root bridge.
what is happening is a loop. i am a newbie of vpls in asr, so any idea/suggestions/clarifications welcome!!!
br and tnx advance, mirko
08-10-2015 10:11 AM
hi mirko,
you dont need to run stp in your vpls core between 7600 and a9k.
the stp runs from your edge devices a9k's to the switch 920.
vpls/pw's in teh core between your PE nodes.
if you want to run stp in the core, you can, not recommended, but then dont use PW's but use the EFP/sufinterfaces between a9k and 7600.
also have a look at this one:
https://supportforums.cisco.com/document/11935841/asr9000xr-using-pvstag-cluster-and-satellite-example
and this:
https://supportforums.cisco.com/document/61401/asr9000xr-using-mst-ag-mst-access-gateway-mst-and-vpls
that describe the Acess gateway functionality and the concepts of vpls/pw's and all that.
cheers!
xander
08-11-2015 01:28 AM
tnx very much for your prompt reply: i am trying a config with psvrtag. i will post findings in the next hours. tnx again mirko
08-11-2015 05:57 AM
all solved. i have used first approach from the first link.
tnx mirko
08-11-2015 06:57 AM
hey mirko, thanks for confirming! great to see the option worked!
cheers!
xander
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