[c-nsp] Bridging Ethernet VLANs over T1

[Gary T. Giesen]

Hi all,

I have an application that requires us to bridge Ethernet VLANs over a
T1. I've previously done this using Nortel/Tasman boxes, and have got
it working with a Cisco 1841 w/T1 WIC (per
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gt_bcp.html),
but I'm having one issue. The Tasman/Nortel boxes allow me to inject
an IP address into one of the VLANs for management purposes, whereas I
can't for the life of me figure out how to do it in Cisco-land.

Cisco config snippet:

bridge 1 protocol ieee

interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
 vlan-id dot1q 10
  description Data VLAN
  bridge-group 1
  exit-vlan-config
 !
 vlan-id dot1q 20
  description Management VLAN
  bridge-group 1
  exit-vlan-config
 !
!

interface Serial0/1/0
 no ip address
 encapsulation ppp
 service-module t1 clock source internal
 bridge-group 1


Nortel/Tasman box on the other end:

module  t1 1
    clock_source line
    exit t1
interface  ethernet 0
    ip  address 10.10.10.10 255.255.255.0
    ip  multicast
        mode pass
        exit multicast
    qos
      exit qos
    vlan
      vlanid 10
      no management
      exit vlan
    exit ethernet
interface  ethernet 1
    qos
      exit qos
    exit ethernet
interface  bundle BCP-TEST
    link  t1 1
    description "Cisco-Nortel BCP Test"
    encapsulation ppp
    ppp mtu 64-1518-1600 mru 64-1518-4500
    bcp
      bridge vlan
      exit bcp
    ip  multicast pass
    red
      exit red
    qos
      exit qos
    exit bundle
vlanfwd
  management
    vlanid 20
    ip_interface  address 192.168.127.2 255.255.255.248
    default_route 192.168.127.1 VlanMgmt
    exit management
  add  vlanid 10 BCP-TEST
  add  vlanid 20 BCP-TEST
  exit vlanfwd

As you can see, VLAN 10 is the data VLAN and VLAN 20 is the management
VLAN. This setup works just fine Nortel-Nortel, but I need to be able
to put an IP address (192.168.127.1/29 in this example) on the bridged
VLAN20 on the Cisco so that I can do in-band management. If you have
any thoughts, I'd love to hear them.

Regards,

GG