IP Router Configuration
Router Configuration Guide 43
• LDP is used to create the MPLS full mesh between the 6PE routers and the IPv4
addresses that are embedded in the next-hop field are reachable by LDP LSPs. The
ingress 6PE router uses the LDP LSPs to reach remote 6PE routers.
6PE Data Plane Support
The ingress 6PE router can push two MPLS labels to send the packets to the egress 6PE
router. The top label is an LDP label used to reach the egress 6PE router. The bottom label is
advertised in MP-BGP by the remote 6PE router. Typically, the IPv6 explicit null (value 2)
label is used but an arbitrary value can be used when the remote 6PE router is from a vendor
other than Alcatel-Lucent.
The egress 6PE router pops the top LDP tunnel label. It sees the IPv6 explicit null label, which
indicates an IPv6 packet is encapsulated. It also pops the IPv6 explicit null label and performs
an IPv6 route lookup to find out the next hop for the IPv6 packet.
Static Route Resolution Using Tunnels
The user can forward packets of a static route to an indirect next-hop over a tunnel
programmed in TTM by configuring the following static route tunnel binding command:
config>router>static-route-entry {ip-prefix/prefix-length} [mcast] indirect {ip-
address}
tunnel-next-hop
resolution {any|disabled|filter}
resolution-filter
[no] ldp
[no] rsvp-te
[no] lsp <name1>
[no] lsp <name2>
.
.
[no] lsp <namen>
exit
[no] sr-isis
[no] sr-ospf
[no] sr-te
[no] lsp <name1>
[no] lsp <name2>
.
.
[no] lsp <namen>
exit
[no] disallow-igp
exit
exit
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