Alcatel-Lucent 7450 Manual page 676

Default
prefer-tunnel-in-tunnel
Syntax
Context
Description
shortcut-transit-ttl-propagate
Syntax
Context
Description
Page 676
• If the ingress binding is an spoke-sdp and the egress binding a mesh-sdp, the PE
will propagate the mac-flush message without modifying the PE-ID included in the
PE-ID TLV.
• If the ingress binding is a mesh-sdp and the egress binding an spoke-sdp, the PE
will propagate the mac-flush message with its own PE-ID.
• When ingress and egress bindings are mesh-sdp, the mac-flush message is never
propagated. This is the behavior regardless of the pe-id-mac-flush-interop flag
configuration.
Note that the PE-ID TLV is never added when generating a mac-flush message on a B-VPLS if the
send-bvpls-flush command is enabled in the I-VPLS. In the same way, no PE-ID is added when
propagating mac-flush from a B-VPLS to a I-VPLS when the propagate-mac-flush-from-bvpls
command is enabled. Mac-flush messages for peers within the same I-VPLS or within the same B-
VPLS domain follow the procedures described above.
no pe-id-mac-flush-interop
[no] prefer-tunnel-in-tunnel
config>router>ldp
This command specifies to use tunnel-in-tunnel over a simple LDP tunnel. Specifically, the user
packets for LDP FECs learned over this targeted LDP session can be sent inside an RSVP LSP which
terminates on the same egress router as the destination of the targeted LDP session. The user can
specify an explicit list of RSVP LSP tunnels under the Targeted LDP session or LDP will perform a
lookup in the Tunnel Table Manager (TTM) for the best RSVP LSP. In the former case, only the
specified LSPs will be considered to tunnel LDP user packets. In the latter case, all LSPs available to
the TTM and which terminate on the same egress router as this target ed LDP session will be
considered. In both cases, the metric specified under the LSP configuration is used to control this
selection.
Note that the lookup in the TTM will prefer a LDP tunnel over an LDP-over-RSVP tunnel if both are
available. Also note that the tunneling operates on the dataplane only. Control packets of this targeted
LDP session are sent over the IGP path.
[no] shortcut-transit-ttl-propagate
config>router>ldp
config>router>mpls
This command configures the TTL handling of transit packets for all LSP shortcuts originating on
this ingress LER. It applies to all LDP or RSVP LSPs that are used to resolve static routes, BGP
routes, and IGP routes.
7450 ESS MPLS Guide