Alcatel-Lucent 7750 SR-OS, Configuration Manual

Page: 113 / 674

IP Router Configuration
7750 SR OS Router Configuration Guide Page 113
Description
This command enables ECMP and configures the number of routes for path sharing; for example, the
value 2 means two equal cost routes will be used for cost sharing.
ECMP can only be used for routes learned with the same preference and same protocol. See the
discussion on preferences in the
static-route command.
When more ECMP routes are available at the best preference than configured in max-ecmp-routes,
then the lowest next-hop IP address algorithm is used to select the number of routes configured in
max-ecmp-routes .
The no form of the command disables ECMP path sharing. If ECMP is disabled and multiple routes
are available at the best preference and equal cost, then the route with the lowest next-hop IP address
is used.
Default
no ecmp
Parameters max-ecmp-routes — The maximum number of equal cost routes allowed on this routing table
instance, expressed as a decimal integer. Setting ECMP max-ecmp-routes to 1 yields the same
result as entering no ecmp .
Values 0 — 32
fib-priority
Syntax fib-priority { high | standard }
Context config>router
Description This command specifies the FIB priority for VPRN.
ignore-icmp-redirect
Syntax [ no ] ignore-icmp-redirect
Context config>router
Description
This command drops ICMP redirects received on the management interface.
The no form of the command accepts ICMP redirects received on the management interface.
ip-fast-reroute
Syntax [ no ] ip-fast-reroute
Context config>router
Description
This command enables IP Fast-Reroute (FRR) feature on the system.
This feature provides for the use of a Loop-Free Alternate (LFA) backup next-hop for forwarding in-
transit and CPM generated IP packets when the primary next-hop is not available. IP FRR is
supported on IPv4 and IPv6 OSPF/IS-IS prefixes forwarded in the base router instance to a network