L2VPN

[Psycho_naT]

Two configuration examples:

Example 1:

CE-A

int fa0/0

  description to PE-A

  encapsulation dot1q 400

  ip address x.x.x.x y.y.y.y

PE-A

int lo0

  ip address 10.10.10.10 255.255.255.255

int fa0/9

  description to CE-A

  switchport

  switchport trunk encapsulation dot1q

  switchport trunk allowed vlan 400

  switchport trunk mode trunk

int vlan 400

  xconnect 10.20.20.20 400 encapsulation mpls

PE-B

int lo0

  ip address 10.20.20.20 255.255.255.255

int fa0/10

  description to CE-B

  switchport

  switchport trunk encapsulation dot1q

  switchport trunk allowed vlan 400

  switchport trunk mode trunk

int vlan 400

  xconnect 10.10.10.10 400 encapsulation mpls

CE-B

int fa0/1

  description to PE-B

  encapsulation dot1q 400

  ip address x.x.x.x y.y.y.y

Example 2:

CE-A

int fa0/0

  description to PE-A

  ip address x.x.x.x y.y.y.y

PE-A

int lo0

  ip address 10.10.10.10 255.255.255.255

int fa0/9

  description to CE-A

  switchport

  switchport access vlan 400

  switchport mode access

int vlan 400

  xconnect 10.20.20.20 400 encapsulation mpls

PE-B

int lo0

  ip address 10.20.20.20 255.255.255.255

int fa0/10

  description to CE-B

  switchport

  switchport access vlan 400

  switchport mode access

int vlan 400

  xconnect 10.10.10.10 400 encapsulation mpls

CE-B

int fa0/1

  description to PE-B

  ip address x.x.x.x y.y.y.y

What mode of EoMPLS is using in this examples (port-based or VLAN-based) ?

In what exampe vlan tag removed or not from frame received from customer ?

[shivjain]

This seems to be Vlan based.

http://www.mplsvpn.info/2009/12/modes-of-ethernet-over-mpls-eompls.html

regards

shivlu jain

[Psycho_naT]

Both examples are VLAN-based ? If possible, please give me link to cisco documentation.

[shivjain]

http://www.cisco.com/en/US/docs/routers/7600/ios/15S/configuration/guide/pfc3mpls.html#wp1421042

regards

shivlu jain

[Psycho_naT]

This document does not contain required information.

[shivjain · Accepted solution]

Hi

EoMPLS supports two pseudowires type: - PW VC Type 5 known as port mode - PW VC type 4 known as VLAN mode Each VC type has a different behavior regarding tags manipulation which comes on top of tags manipulation done at the Attachment Circuit (AC) level.

Based on RFC 4448, an Ethernet PW can operate in two different modes:

- Raw mode or VC Type 5

- Tagged mode or VC Type 4

( http://www.mplsvpn.info/2009/12/modes-of-ethernet-over-mpls-eompls.html )

The main difference is in raw mode the service delimiter tag (outer tag) must not be propagated and in  tagged mode the service delimiter tag must be kept  to the frame before forwarding it into the PW. Those operations are independant from other tags manipulation that could happen at the AC level.

VC type 5 no tag is carried where as in VC type 4 tag is carried forward.

As per my understanding you are looking for the documents which could demonstrate VC type 4 and VC type 5. If something else is required, please let me know. Will happy to help you on that part too.

http://fengnet.com/book/layer%202%20vpn%20architectures/ch07lev1sec2.html

The above mentioned link is having both examples of VC type 4 and VC type 5.

regards

shivlu jain

www.mplsvpn.info

[Psycho_naT]

Here, i all understanding at first time: http://www.mplsvpn.info/2009/12/modes-of-ethernet-over-mpls-eompls.html

Here: http://fengnet.com/book/layer%202%20vpn%20architectures/ch07lev1sec2.html. I found this example earlier, but read this inattentively. Read in second time i understand that "trunk port to svi-xconnect config" and "subinterface-xconnect config" is equivalent and this is a VC type 4 and vlan tag transmited through mpls cloud.

But how about second example "access port to svi-xconnect" ?

Thanks for examples.

[shivjain]

Hi

Access port to SVI is simple config where in once the packets received at acces port removes the vlan and forwards the packets to the remote destination on the basis of VCID. Both the ingress and egree PE routers must has the same VCID configure. This configuration is known as VC Type 5 which means you are not transmitting the vlans frames over the MPLS cloud.

regards

Shivlu Jain

[Psycho_naT]

Thank you very much

[shivjain]

Hi

If your query is resloved request you to close the thread and rate the conversation. 

regards

shivlu jain