Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual page 243

Configuring MPLS
•
The "to-R2-alt" instance provides a backup static LSP from R3 directly to R2 (10.10.10.2). If the
"to-R2" tunnel goes down, the Fast ReRoute (FRR) mechanism redirects packets to the "to-R2-alt"
tunnel. The "to-R2-alt" instance then pushes label 111 onto packets and forwards them to R2.
•
The "to-R4" instance provides a static LSP from R3 through transit routers R1 and R2 to egress
router R4 (10.1.1.3). This instance pushes label 556 on to packets and forwards them to R1, where
the label is swapped and the packets are forwarded to R2 for swapping and forwarding to R4.
•
The "to-R4-alt" instance provides a backup static LSP from R3 directly to R4 (10.1.1.3). If the "to-
R4" tunnel goes down, the Fast ReRoute (FRR) mechanism redirects packets to the "to-R4-alt"
tunnel. The "to-R4-alt" instance then pushes label 222 onto packets and forwards them to R2, where
the label is swapped and forwarded on to R4.
3
Create and enable MPLS interfaces and label-map actions.
-> configure router mpls interface vlan-30
-> configure router mpls interface vlan-30 no shutdown
-> configure router mpls interface vlan-30 label-map 888
-> configure router mpls interface vlan-30 label-map 888 pop
-> configure router mpls interface vlan-30 label-map 888 no shutdown
-> configure router mpls interface vlan-30 label-map 999
-> configure router mpls interface vlan-30 label-map 999 pop
-> configure router mpls interface vlan-30 label-map 999 no shutdown
-> configure router mpls interface vlan-20
-> configure router mpls interface vlan-20 no shutdown
-> configure router mpls interface vlan-20 label-map 558
-> configure router mpls interface vlan-20 label-map 558 pop
-> configure router mpls interface vlan-20 label-map 558 no shutdown
-> configure router mpls interface vlan-20 label-map 112
-> configure router mpls interface vlan-20 label-map 112 pop
-> configure router mpls interface vlan-20 label-map 112 no shutdown
The above commands created MPLS interfaces vlan-20 and vlan-30.
•
MPLS interface vlan-20 will pop incoming labels 558 and 112 off of the packets, marking the end
of MPLS switching.
•
MPLS interface vlan-30 will pop incoming labels 888 and 999 off of the packets, marking the end
of MPLS switching.
4
Load and configure the OSPF routing protocol.
-> ip load ospf
-> ip ospf area 0.0.0.0
-> ip ospf interface "vlan-40"
-> ip ospf interface "vlan-40" area 0.0.0.0
-> ip ospf interface "vlan-40" status enable
-> ip ospf status enable
5
Enable the LDP instance (enabled by default) and create the LDP interface required for the signaled-
LSP between R3 and R4.
-> configure router ldp no shutdown
-> configure router ldp interface-parameters interface vlan-40
OmniSwitch AOS Release 6 Network Configuration Guide September 2009
MPLS Application Example
page 10-35