Typical L2VPN-CCC Configuration

Typical L2VPN-CCC Configuration

[Requirements]

Set up a local CCC connection between the S2/0/0 of CE-A and the S2/0/0 of CE-B, and a remote CCC connection between the S2/0/1 of CE-A and the S2/0/0 of CE-C.

[Networking diagram]

[Configuration script]

Configuration script (CE-A)

# sysname CE-A # radius scheme system # domain system # interface Serial2/0/0 link-protocol ppp ip address 192.168.11.1 255.255.255.0 # interface Serial2/0/1 link-protocol ppp ip address 192.168.21.1 255.255.255.0 # interface NULL0 # user-interface con 0 user-interface vty 0 4 # return

Configuration script (CE-B)

# sysname CE-B # radius scheme system # domain system # interface Serial2/0/0 link-protocol ppp ip address 192.168.11.2 255.255.255.0 # interface NULL0 # user-interface con 0 user-interface vty 0 4 # return

Configuration script (PE-A)

# sysname PE-A # router id 1.1.1.1 # mpls lsr-id 1.1.1.1 # mpls l2vpn        /Enable MPLS L2VPN/ # radius scheme system # mpls static-lsp ingress PEA-PEB l2vpn outgoing-interface Serial2/0/3 out-label 100 /Configure a static LSP for L2VPN/ static-lsp egress PEB-PEA l2vpn incoming-interface Serial2/0/3 in-label 201 /Configure a static LSP for L2VPN/ # domain system # interface Serial2/0/0 link-protocol ppp # interface Serial2/0/1 link-protocol ppp # interface Serial2/0/2 link-protocol ppp # interface Serial2/0/3 link-protocol ppp ip address 10.0.0.1 255.255.255.252 mpls # interface NULL0 # interface LoopBack0 ip address 1.1.1.1 255.255.255.255 # ccc local-to-CEB interface Serial2/0/0 out-interface Serial2/0/2 /Create a local CCC connection/ ccc remote-to-CEC interface Serial2/0/1 transmit-lsp PEA-PEB receive-lsp PEB-PEA /Create a remote CCC connection/ # user-interface con 0 user-interface vty 0 4 # return

Configuration script (P)

# sysname P # router id 2.2.2.2 # mpls lsr-id 2.2.2.2 # mpls l2vpn            /Enable MPLS L2VPN/ # radius scheme system # mpls static-lsp transit PEA-PEB l2vpn incoming-interface Serial2/0/0 in-label 100 outgoing-interface Serial2/0/1 out-label 101 /Configure a static LSP for L2VPN/ static-lsp transit PEB-PEA l2vpn incoming-interface Serial2/0/1 in-label 200 outgoing-interface Serial2/0/0 out-label 201 /Configure a static LSP for L2VPN/ # domain system # interface Serial2/0/0 link-protocol ppp ip address 10.0.0.2 255.255.255.252 mpls # interface Serial2/0/1 link-protocol ppp ip address 10.0.0.5 255.255.255.252 mpls # interface NULL0 # interface LoopBack0 ip address 2.2.2.2 255.255.255.255 # user-interface con 0 user-interface vty 0 4 # return

Configuration script (PE-B)

# sysname PE-B # router id 3.3.3.3 # mpls lsr-id 3.3.3.3 # mpls l2vpn                /Enable MPLS L2VPN/ # # radius scheme system # mpls static-lsp ingress PEB-PEA l2vpn outgoing-interface Serial2/0/0 out-label 200 /Configure a static LSP for L2VPN/ static-lsp egress PEA-PEB l2vpn incoming-interface Serial2/0/0 in-label 101 /Configure a static LSP for L2VPN/ # domain system # interface Serial2/0/0 link-protocol ppp ip address 10.0.0.6 255.255.255.252 mpls # interface Serial2/0/1 link-protocol ppp # interface NULL0 # interface LoopBack0 ip address 3.3.3.3 255.255.255.255 # ccc remote-to-CEA interface Serial2/0/1 transmit-lsp PEB-PEA receive-lsp PEA-PEB /Create a remote CCC connection/ # user-interface con 0 user-interface vty 0 4 # return

Configuration script (CE-C)

# sysname CE-C # radius scheme system # domain system # interface Serial2/0/0 link-protocol ppp ip address 192.168.21.2 255.255.255.0 # interface NULL0 # user-interface con 0 user-interface vty 0 4 # return

 

[Verification]

Display the CCC connection state on PE-A:

<PE-A>disp ccc

total  connections : 2

local  connections : 1,  1 up

remote connections : 1,  1 up

 

name: local-to-CEB, type: local, state: up,

intf1: Serial2/0/0 (up),   intf2: Serial2/0/2 (up)

 

name: remote-to-CEC, type: remote, state: up,

intf: Serial2/0/1 (up), tran-lsp: PEA-PEB (up), rcv-lsp: PEB-PEA (up)

 

Display the static LSP on PE-A:

<PE-A>disp mpls lsp

 

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

LSP Information: Static Lsp

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

 

TOTAL:  2 Record(s) Found.

 

NO    FEC                 NEXTHOP         I/O-LABEL    OUT-INTERFACE

1     0.0.0.0/0           -------         -----/100    S2/0/3

2     -------/--          -------         201/-----    -------

 

Display the static LSP on P:

<P>disp mpls lsp

 

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

LSP Information: Static Lsp

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

 

TOTAL:  2 Record(s) Found.

 

NO    FEC                 NEXTHOP         I/O-LABEL    OUT-INTERFACE

1     -------/--          -------         100/101      S2/0/1

2     -------/--          -------         200/201      S2/0/0

 

Display the static LSP on PE-B:

<PE-B>disp mpls lsp

 

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

LSP Information: Static Lsp

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

 

TOTAL:  2 Record(s) Found.

 

NO    FEC                 NEXTHOP         I/O-LABEL    OUT-INTERFACE

1     0.0.0.0/0           -------         -----/200    S2/0/0

2     -------/--          -------         101/-----    -------

 

[Tip]

1. Circuit Cross Connect (CCC) is a way to realize MPLS L2VPN by configuring static LSP.

2. Be sure to manually configure two LSPs (in the two directions) for each CCC connection on every node (including the PE and P). These two LSPs are dedicated to transmitting the data of the CCC connection rather than other MPLS L2VPN connections, or they cannot be used in BGP/MPLS VPN or carrying common IP packets.

3. There is only one layer of label in the CCC mode.