[c-nsp] PWHE on ASR9k with IOS XR 4.3.0 and 6500/SUP720 and 7600/SUP720

[Richard Hartmann]

Dear all,


we tried to establish PWHE between ASR9k with IOS XR 4.3.0 and both
6500/SUP720 and 7600/SUP720. We even tried different approaches. The
VC does come up in both cases, but no ICMP Ping goes through. To add
insult to injury, we can see the MAC addresses from the other side.

See config and command results below; according to both our best
knowledge _and_ Cisco documentation, this should work.

As an aside, I will gladly take snippets from someone who has a
similar configuration working and use those as a starting point.


Thanks for any and all feedback,
RIchard


---------------------------------

ASR9k <> 6500/SUP720 (LAN card upstream)

ASR9k:

generic-interface-list test
 interface GigabitEthernet0/0/0/5
!
interface PW-Ether1128
 mtu 1514
 ipv4 address xxx 255.255.255.254
 attach generic-interface-list test
!
l2vpn
 xconnect group 11988-1128
  p2p 11988-1128
   interface PW-Ether1128
   neighbor IP_6500 pw-id 1128
   !
  !
 !
!

----

6500:

interface GigabitEthernet5/9.958
 encapsulation dot1Q 958
 xconnect IP_ASR 958 encapsulation mpls

Downstream of 6500:

interface VLAN 958
 ip address yyy 255.255.255.254

---------------------------------

ASR9k <> 7600/SUP720 (_W_AN card upstream)

ASR9k:

interface PW-Ether1200
 ipv4 address 10.66.6.58 255.255.255.0
 attach generic-interface-list GIL-PW-Ether1200
!
l2vpn
 xconnect group L2-XC-1200
  p2p L2-XC-P2P-1200
   interface PW-Ether1200
   neighbor IP_7600 pw-id 1200
   !
  !
 !
!
generic-interface-list GIL-PW-Ether1200
 interface TenGigE0/0/2/1
 interface GigabitEthernet0/0/0/0
 interface GigabitEthernet0/0/0/1
 interface GigabitEthernet0/0/0/2
 interface GigabitEthernet0/0/0/3
 interface GigabitEthernet0/0/0/4
 interface GigabitEthernet0/0/0/5
 interface GigabitEthernet0/0/0/19
!

--

#sh l2vpn xconnect encapsulation mpls
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
        SB = Standby, SR = Standby Ready, (PP) = Partially Programmed

XConnect                   Segment 1                       Segment 2
Group      Name       ST   Description            ST       Description
           ST
------------------------   -----------------------------
-----------------------------
L2-XC-1200 L2-XC-P2P-1200
                      UP   PE1200                 UP       IP_7600
1200   UP
----------------------------------------------------------------------------------------
#show route ipv4 10.66.6.8

Routing entry for 10.66.6.0/24
  Known via "connected", distance 0, metric 0 (connected)
  Installed Jun  6 15:14:35.102 for 00:37:15
  Routing Descriptor Blocks
    directly connected, via PW-Ether1200
      Route metric is 0
  No advertising protos.
#ping 10.66.6.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.66.6.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
ping 10.66.6.58
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.66.6.58, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/2 ms
#sh arp pw-Ether 1200

-------------------------------------------------------------------------------
0/0/CPU0
-------------------------------------------------------------------------------
Address         Age        Hardware Addr   State      Type  Interface
10.66.6.8       00:35:25   000a.f332.6a80  Dynamic    ARPA  PW-Ether1200
10.66.6.58      -          8478.ac46.643d  Interface  ARPA  PW-Ether1200
#

----

7600:

#sh run int vlan 1200
Building configuration...

Current configuration : 131 bytes
!
interface Vlan1200
 ip address 10.66.6.8 255.255.255.0
 xconnect IP_ASR 1200 encapsulation mpls
end
#sh mpls l2transport vc | in 1200
Vl1200         Eth VLAN 1200              IP_ASR   1200       UP
#sh int Vlan 1200 | in line protocol
Vlan1200 is up, line protocol is up
#ping 10.66.6.8

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.66.6.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
#ping 10.66.6.58

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.66.6.58, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
##sh arp vlan 1200
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  10.66.6.8               -   000a.f332.6a80  ARPA   Vlan1200
Internet  10.66.6.58             54   8478.ac46.643d  ARPA   Vlan1200
#
--


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