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EoMPLS(Ethernet SVI) VC Type 5 ?

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Hi there!

is is possible to use VC Type 5 in spite of Ethernet SVI in EoMPLS ?

I know that VC Type 5 (Ethernet Type) is port based EoMPLS and VC Type 4 (Ethernet vlan) is VLAN based EoMPLS.

But I found that despite Ethernet SVI configured, the VC type is Type 5

How could I adjust the VC Type? I heard that there is no option to manipulate the VC Type in Cisco Equipment.

(the VC type depends on the negotiation between PEs, right?)

Here is an example  (The router spec is C6509 SUP720-3BXL)

Router#sh mpls l2transport vc

Local intf     Local circuit        Dest address    VC ID      Status   
-------------  -------------------- --------------- ---------- ----------
    
Gi3/46.34      Eth VLAN 34          1.1.1.1  34         UP

Router#sh mpls l2transport binding 34
  Destination Address: 1.1.1.1,  VC ID: 34
    Local Label:  409
        Cbit: 0,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: == e: EoMPLS Connect ==
        VCCV Capabilities: Type 2
    Remote Label: 2618
        Cbit: 0,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: == e: EoMPLS Connect ==
        VCCV Capabilities: Type 2

interface GigabitEthernet3/46.34
description == e: EoMPLS Connect ==
encapsulation dot1Q 34
no ip redirects
xconnect 1.1.1.1 34 encapsulation mpls

===============================================

opposite PE is as below (this router's spec is C7609S RSP720-3CXL : 12.2(33) SRD4)

pe02.sel.ia#sh mpls l2transport vc

Local intf     Local circuit              Dest address    VC ID      Status   
-------------  -------------------------- --------------- ---------- ----------
Fa1/0/5        Ethernet                   2.2.2.2  34         UP

pe02.sel.ia#sh mpls l2transport binding 34
  Destination Address: 2.2.2.2,  VC ID: 34
    Local Label:  2618
        Cbit: 0,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: == e: EoMPLS Connect ==
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]
    Remote Label: 409
        Cbit: 0,    VC Type: Ethernet,    GroupID: 0
        MTU: 1500,   Interface Desc: == e: EoMPLS Connect ==
        VCCV: CC Type: RA [2]
              CV Type: LSPV [2]

interface FastEthernet1/0/5
description == e: EoMPLS Connect ==
speed 100
duplex full
no negotiation auto
xconnect 2.2.2.2 34 encapsulation mpls

Thanks & Regards

###################

I wonder why you chose the document type, as we cannot reply but just edit it.

Anyway for vlan mode eompls cisco devices can support both vc 4 &  vc type 5.This depends on which platform we are configuring.

i.e: for eompls tunnel between 2 7200 or between cat6k/7600 and 7200 VC type 4 is negotiated (as 7200 does not support anything else).

For tunnels between 2 cat6k/7600 vc 5 is chosen.

For port mode eompls vc 5 type is always negotiated.

Also about vlan mode eompes the cat6k/7600 tries to negotiate VC type 5 by default. If the peering

platform is incapable of reinserting the vlan tag, then the PW falls back to VC type 4. 
You can find out the vc type being negotiated using "show mpls l2 binding <vcid>" .

Finally there is no way to control that. The VC type is signalled by the 2 PEs upon VC establishment; if both ends support VC 5 that one will be picked 
or else VC 4 will be negotiated.

Riccardo
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