Static Route Ecmp Support - Alcatel-Lucent 7450 Configuration Manual

Static Route Resolution Using Tunnels
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If one or more explicit tunnel types are specified using the resolution-filter option, then only these
tunnel types will be selected again following the TTM preference. In the case of RSVP-TE tunnel
type, the user can further restrict the selection by providing a list of LSP names.
The user must set resolution to filter to activate the list of tunnel-types configured under
resolution-filter.
If disallow-igp is enabled, the static-route will not be activated using IP next-hops in RTM if no
tunnel next-hops are found in TTM.

Static Route ECMP Support

The following is the ECMP behavior of a static route:
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The rsvp value instructs the code to search for the best metric RSVP LSP to the address of
the indirect next-hop. This address can correspond to the system interface or to another
loopback used on the remote node. The LSP metric is provided by MPLS in the tunnel
table. In the case of multiple RSVP LSPs with the same lowest metric, the code selects the
LSP with the lowest tunnel-id.
ECMP is supported when resolving in RTM multiple static routes of the same prefix with
multiple user-entered indirect IP next-hops. The system picks as many direct next-hops as
available in RTM beginning from the first indirect next-hop and up to the value of the
ecmp option in the system.
ECMP is also supported when resolving in TTM a static route to a single indirect next-hop
using a LDP tunnel when LDP has multiple direct next-hops.
ECMP is supported when resolving in TTM a static route to a single indirect next-hop
using a RSVP-TE tunnel type when there is more than one RSVP LSP with the same
lowest metric to the indirect next-hop.
ECMP is supported when resolving in TTM a static route to a single indirect next-hop
using a list of user configured RSVP-TE LSP names when these LSPs have the same
metric to the indirect next-hop.
ECMP is supported when resolving in TTM multiple static routes of the same prefix with
multiple user-entered indirect next-hops each binding to a tunnel type. The system picks as
many tunnel next-hops as available in TTM beginning from the first indirect next-hop and
up to the value of the ecmp option in the system.
ECMP is supported when resolving concurrently in RTM and TTM multiple static routes
of the same prefix with multiple user entered indirect tunnel next-hops. There is no support
for mixing IP and tunnel next-hops for the same prefix using different indirect next-hops.
Tunnel next-hops preferred over IP next-hops.
7450 ESS Router Configuration Guide