[c-nsp] pseudowire between two ME-C3750-24TE ports is not transparent to STP

[Martin T]

Looks like the "trick" was to disable the STP for VLAN 1 in the switch
where the pseudowire was created(ME-C3750-24TE). Now the BPDU -s seem
to pass through:

WS-C3750G-24TS#sh spanning-tree

VLAN0888
  Spanning tree enabled protocol ieee
  Root ID    Priority    33656
             Address     001b.906a.e080
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    33656  (priority 32768 sys-id-ext 888)
             Address     001b.906a.e080
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1              Desg FWD 4         128.616  P2p

WS-C3750G-24TS#



WS-C3750G-12S#sh spanning-tree

VLAN0888
  Spanning tree enabled protocol ieee
  Root ID    Priority    33656
             Address     001b.906a.e080
             Cost        4
             Port        616 (Port-channel1)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    33656  (priority 32768 sys-id-ext 888)
             Address     0024.9731.1680
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1              Root FWD 4         128.616  P2p

WS-C3750G-12S#



regards,
Martin

On 8/23/13, Martin T <m4rtntns at gmail.com> wrote:
> Hi,
>
> I made a pseudowire between Cisco
> ME-C3750-24TE(c3750me-i5k91-mz.122-58.SE2.bin) ES ports Gi1/1/1 and
> Gi1/1/2:
>
> ME-C3750-24TE#sh run int Gi1/1/1
> Building configuration...
>
> Current configuration : 38 bytes
> !
> interface GigabitEthernet1/1/1
> end
>
> ME-C3750-24TE#sh run int Gi1/1/2
> Building configuration...
>
> Current configuration : 38 bytes
> !
> interface GigabitEthernet1/1/2
> end
>
> ME-C3750-24TE#sh run | sec conne
> connect TEST GigabitEthernet1/1/1 GigabitEthernet1/1/2
>  !
> ME-C3750-24TE#
>
>
> Overall topology looks like this:
>
> WS-C3750G-24TS[Gi1/0/28] <-> [Gi1/1/2]ME-C3750-24TE[Gi1/1/1] <->
> [Gi1/0/12]WS-C3750G-12S
>
>
> While the pseudowire is transparent for LACP or CDP:
>
> WS-C3750G-12S#sh cdp neig
> Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
>                   S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
>
> Device ID            Local Intrfce         Holdtme   Capability
> Platform   Port ID
> WS-C3750G-24TS      Gig 1/0/12            133            S I
> WS-C3750G-Gig 1/0/28
> WS-C3750G-12S#
>
> WS-C3750G-24TS#sh cdp neig
> Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
>                   S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
>
> Device ID            Local Intrfce         Holdtme   Capability
> Platform   Port ID
> WS-C3750G-12S       Gig 1/0/28            125            S I
> WS-C3750G-Gig 1/0/12
> WS-C3750G-24TS#
>
> ..it's not transparent for STP and the switch where the pseudowire is
> created(ME-C3750-24TE) becomes the root bridge. Is the pseudowire
> between interfaces not transparent for all the L2 protocols or am I
> doing something wrong?
>
>
>
> regards,
> Martin
>