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56 bytes from 11::1, icmp_seq=4 hlim=63 time=1.000 ms
--- Ping6 statistics for 11::1 ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 1.000/1.200/2.000/0.400 ms
IPv6 label acceptance control configuration example
Network requirements
Two links, Router A—Router B—Router C and Router A—Router D—Router C, exist between
subnets 11::0/64 and 21::0/64.
Configure LDP to establish LSPs only for routes to subnets 11::0/64 and 21::0/64.
Configure LDP to establish LSPs only on the link Router A—Router B—Router C to forward traffic
between subnets 11::0/64 and 21::0/64.
Figure 23 Network diagram
Requirements analysis
•
To ensure that the LSRs establish IPv6 LSPs automatically, enable IPv6 LDP on each LSR.
•
To establish IPv6 LDP LSPs, configure an IPv6 routing protocol to ensure IP connectivity
between the LSRs. This example uses OSPFv3.
•
To ensure that LDP establishes IPv6 LSPs only for the routes 11::0/64 and 21::0/64, configure
IPv6 LSP generation policies on each LSR.
•
To ensure that LDP establishes IPv6 LSPs only over the link Router A—Router B—Router C,
configure IPv6 label acceptance policies as follows:
Router A accepts only the label mapping for FEC 21::0/64 received from Router B. Router A
denies the label mapping for FEC 21::0/64 received from Router D.
Router C accepts only the label mapping for FEC 11::0/64 received from Router B. Router C
denies the label mapping for FEC 11::0/64 received from Router D.
Configuration procedure
1.
Configure IPv6 addresses and masks for interfaces, including the loopback interfaces, as
shown in
Figure
23. (Details not shown.)
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