Configuring Inter-AS Martini VPLS in OptionA Mode
When VPLS is deployed in a large area, PEs may belong to different ASs. In this case, PWs cannot be established between PEs through LDP. To solve the problem in a normal network, configure inter-AS Martini VPLS.
Pre-configuration Task
Before configuring inter-AS Martini VPLS in OptionA mode, complete the following tasks:
- Configure IGP for the MPLS backbone network of each AS to ensure IP connectivity of the backbone network within an AS.
- Configure basic MPLS functions on the MPLS backbone network of each AS.
- Configure MPLS LDP and establish the LDP LSP for the MPLS backbone network of each AS.
- Establish a tunnel between the PE and ASBR within an AS.
Context
The configuration is described as follows:
- Configuring Martini VPLS in each AS.
- An ASBR considers a peer ASBR as a CE.
- No inter-AS configuration needs to be performed on ASBRs.
- No IP address needs to be configured for the interfaces connecting ASBRs.
For details, see Configuring Martini VPLS.
In inter-AS Martini VPLS OptionA, each ASBR must reserve an AC interface for each inter-AS VC. OptionA can be used when the number of inter-AS VCs is small. Compared with the L3VPN, the inter-AS L2VPN OptionA consumes more resources and requires more configuration workload. Therefore, the inter-AS L2VPN OptionA is not recommended.
Verifying the Configuration
- Run the display vsi [ name vsi-name ] [ verbose ] command to check information about a VPLS VSI.
- Run the display vsi remote ldp [ router-id ip-address ] [ pw-id pw-id ] command to check information about a remote VSI.
- Run the display vpls connection [ ldp | vsi vsi-name ] [ down | up ] [ verbose ] command to check information about a VPLS connection.
- Run the ping vpn-config peer-address peer-address vsi-name vsi-name [ pw-id pw-id ] [ local ] [ remote ] command to check configurations of the VSI on the peer PE.
- Run the ping vpls mac mac-address vsi vsi-name [ vlan vlan-id | -c count | -m time-value | -s packsize | -t timeout | -exp exp | -r replymode ] * command to check the connectivity of Layer 2 links on the VPLS network.
- Run the trace vpls mac mac-address vsi vsi-name [ vlan vlan-id ] [ -t timeout | -f first-ttl | -m max-ttl | -exp exp | -r replymode ] * command to check the PEs and P that packets pass from the sender to the receiver and check the connectivity of Layer 2 links, which helps locate the faulty node on the network.
In OptionA mode, the ping and trace functions support intra-AS detection.