Hi there,
I have been busy with a migration for a customer, from a pair of 7600's to the ASR 9000. What I am struggling with is the L2 side of things and spanning tree. I have setup all the necessary trunks, bridge domains, BVI's etc and everything seems to work okay except when it comes to access ports.
If I have for example a standard access port on the 7600, I migrate it to the ASR9000 as follows:
interface GigabitEthernet0/1/0/11.390 l2transport
encapsulation untagged
!
The BVI is configured like so:
!
interface BVI390
description Server
ipv4 address 10.0.0.1 255.255.255.0
!
I then configure it on the L2 VPN side...
!
l2vpn
bridge-domain VLAN390
interface Bundle-Ether1.390
!
interface GigabitEthernet0/1/0/11.390
!
routed interface BVI390
!
I can then ping the server hanging off Gi0/1/0/11...
RP/0/RSP0/CPU0:asr9k#ping 10.0.0.20
Tue Oct 20 11:57:48.773 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.20, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
But as soon as I add the port to the spanning tree instance, it just locks up and it no longer works? I realise in this case its a server that's attached and doesn't really need spanning tree, but I would have thought I needed to add the port to spanning tree like in the case of the 7600.
spanning-tree pvrst PVRSTPNRK01
!
vlan 390
priority 4096
!
interface GigabitEthernet0/1/0/11 ! If this is configured then the port stops working.
!
Please help me understand what I should be adding to the spanning tree topology??
The STP topology is simple. Two ASR9K's with a trunk (Bundle-Ether and sub-ints) between them, and then an additional L2 switch connected to both ASR9K's with trunks as well. ASR9K on the left is root bridge.
ASR9K ---------------- ASR9K
\ /
\ /
\ /
L2 Switch
