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To ensure that LDP establishes IPv6 LSPs only over the link Router A—Router B—Router C,
configure IPv6 label advertisement policies as follows:
Router A advertises only the label mapping for FEC 11::0/64 to Router B.
Router C advertises only the label mapping for FEC 21::0/64 to Router B.
Router D does not advertise label mapping for FEC 21::0/64 to Router A. Router D does not
advertise label mapping for FEC 11::0/64 to Router C.
Configuration procedure
1.
Configure IPv6 addresses and masks for interfaces, including the loopback interfaces, as
shown in
2.
Configure OSPFv3 on each router to ensure IP connectivity between them. (Details not shown.)
3.
Enable MPLS and IPv6 LDP:
# Configure Router A.
<RouterA> system-view
[RouterA] mpls lsr-id 1.1.1.9
[RouterA] mpls ldp
[RouterA-ldp] quit
[RouterA] interface serial 2/1/0
[RouterA-Serial2/1/0] mpls enable
[RouterA-Serial2/1/0] mpls ldp ipv6 enable
[RouterA-Serial2/1/0] mpls ldp transport-address 10::1
[RouterA-Serial2/1/0] quit
[RouterA] interface serial 2/1/1
[RouterA-Serial2/1/1] mpls enable
[RouterA-Serial2/1/1] mpls ldp ipv6 enable
[RouterA-Serial2/1/1] mpls ldp transport-address 30::1
[RouterA-Serial2/1/1] quit
# Configure Router B.
<RouterB> system-view
[RouterB] mpls lsr-id 2.2.2.9
[RouterB] mpls ldp
[RouterB-ldp] quit
[RouterB] interface serial 2/1/0
[RouterB-Serial2/1/0] mpls enable
[RouterB-Serial2/1/0] mpls ldp ipv6 enable
[RouterB-Serial2/1/0] mpls ldp transport-address 10::2
[RouterB-Serial2/1/0] quit
[RouterB] interface serial 2/1/1
[RouterB-Serial2/1/1] mpls enable
[RouterB-Serial2/1/1] mpls ldp ipv6 enable
[RouterB-Serial2/1/1] mpls ldp transport-address 20::1
[RouterB-Serial2/1/1] quit
# Configure Router C.
<RouterC> system-view
[RouterC] mpls lsr-id 3.3.3.9
[RouterC] mpls ldp
[RouterC-ldp] quit
[RouterC] interface serial 2/1/0
[RouterC-Serial2/1/0] mpls enable
Figure
24. (Details not shown.)
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