VPLS Configuration Example Configuring VPLS
page 11-28 OmniSwitch AOS Release 6 Network Configuration Guide September 2009
Step 1: Configure the System IP Address
The Loopback0 interface address serves as the MPLS system IP address for the OmniSwitch. Configure
the Loopback0 interface for Router 1, Router 2, and Router 3. Use the IP address shown as the “Host
Addr” in the example configuration diagram.
-> ip interface Loopback0 address 9.1.1.1
-> ip interface Loopback0 address 9.1.1.2
-> ip interface Loopback0 address 9.1.1.3
Step 2: Configure the LDP Interfaces
Configure LDP support on the adjacent IP interfaces for Router 1, Router 2, and Router 3. For more infor-
mation about configuring LDP, see Chapter 10, “Configuring MPLS.”
Router 1 (PE1)
-> configure router ldp interface-parameters interface IF0
Router 2 (Transit Router)
-> configure router ldp interface-parameters interface IF1
-> configure router ldp interface-parameters interface IF2
Router 3 (PE2)
-> configure router ldp interface-parameters interface IF3
Step 3: Configure the SDPs
Configure an SDP on Router 1 and Router 3. SDP tunnels are unidirectional, so SDPs are configured in
each direction. Note that an SDP is not configured on Router 2 because of its transit router status in the
example configuration.
Router 1 (PE1)
-> configure service sdp 8 far-end 9.1.1.3
The above command creates SDP 8 on Router 1 (PE1) and specifies Router 3 (PE2; system IP 9.1.1.3) as
the remote endpoint for the SDP tunnel.
• A tunnel session is initiated to the far end (PE2). MPLS uses LDP for signaling the LSP's. The label
assignment is signaled by Targeted LDP (T-LDP).
• Label 21 is bound to the local host interface. This defines the host FEC for PE1 (9.1.1.1,21).
• PE1 sends a down stream unsolicited (DU) message to the transit router (Router 2). When the transit
router receives the host FEC from Router 1, LDP will create a push/swap entry for this label
(9.1.1.1,21/22).
• The transit router sends a down stream unsolicited message to PE2. The far-end (PE2) creates a push
entry for FEC (9.1.1.1,22)
Router 3 (PE2)
-> configure service sdp 8 far-end 9.1.1.1
The above command creates SDP 8 on Router 3 (PE2) and specifies Router 1 (PE1; system IP 9.1.1.1) as
the remote endpoint for the SDP tunnel.
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