L2VPN Local Switching VLAN to VLAN issue on 7200VXR/NPE-G1

Question

I've been working with a client trying to get this working. We tried 12.2(31)SB6, 12.4(15)T1 IP Services and 12.4(15)T1 Advanced IP Services.
It works fine for Ethernet to Ethernet, or Ethernet to VLAN, but it doesn't work for VLAN to VLAN either on the same interface or on different interfaces. We've tried this on both a Cat5505 as well as a Cat294XL thinking that maybe there would be some issues with one platform or the other.
Here's an example:
! VXR (12.4(15)T1 Adv. IP Services)
interface GigabitEthernet0/1
no ip address
duplex full
speed 100
media-type rj45
no negotiation auto
interface GigabitEthernet0/1.202
encapsulation dot1Q 202
interface GigabitEthernet0/1.203
encapsulation dot1Q 203
connect test GigabitEthernet0/1.202 GigabitEthernet0/1.203
! Cat 5505
set vlan 202 9/1
set vlan 203 9/2
set port name 9/1 PC1
set port name 9/2 PC2
set port name 9/3 VXR-G0/1TRUNK
clear trunk 9/3 1-201,204-999
set trunk 9/3 on dot1q 202-203,1000-1005
We seem to be able to sequeeze a few packets through every once in awhile - like 1 or 2 every 20 or 30 packets:
64 bytes from 192.168.1.1: icmp_seq=10 ttl=64 time=0.604 ms
64 bytes from 192.168.1.1: icmp_seq=18 ttl=64 time=0.638 ms
64 bytes from 192.168.1.1: icmp_seq=40 ttl=64 time=0.621 ms
64 bytes from 192.168.1.1: icmp_seq=48 ttl=64 time=0.608 ms
64 bytes from 192.168.1.1: icmp_seq=70 ttl=64 time=0.605 ms
64 bytes from 192.168.1.1: icmp_seq=78 ttl=64 time=0.630 ms
As you can see from the below show interface, the interface is receiving lots more packets than it's sending:
Router#show int g0/1
GigabitEthernet0/1 is up, line protocol is up
Hardware is BCM1250 Internal MAC, address is 001c.b0fa.101b (bia 001c.b0fa.101b)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set
Keepalive set (10 sec)
Full Duplex, 100Mbps, RJ45, media type is RJ45
output flow-control is unsupported, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:00:15
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
40 packets input, 2836 bytes, 0 no buffer
Received 36 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 19 multicast, 0 pause input
8 packets output, 672 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Router#
Does L2VPN Local Switching VLAN to VLAN not work on VXRs or something?
This link seems to indicate that E-E VLAN is supported in 12.4(11)T.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s27/fslocal.htm#wp1149105
What am I missing?

Answer 1

Hi,
In ASR9k, VLAN is port significant so yes you can match the same VLAN on different port.
For your untagged traffic, both UPE fo site 1 will think they are directly connected via two links so yes STP should take care about the loop
For your VPLS domain, if you are not using VLAN 100 on site 3, you need to pop the tag on both ASR9k. Also do you extend STP to site 3 ?
SVI is not supported in ASR9k today so you have to use unumbered interfaces instead:
interface Loopback1
ipv4 address a.b.c.d 255.255.255.255
interface g0/7/0/0.200
encapsulation dot1q 200
ipv4 point-to-point
ipv4 unnumbered Loopback1
proxy-arp
interface g0/7/0/1.200
encapsulation dot1q 200
ipv4 point-to-point
ipv4 unnumbered Loopback1
proxy-arp
I never tested it in this situation but from STP perspective those links should be seen as host connection.
Let me know if it works
HTH
Laurent.