Configure Ospf Stub-Router Advertisement - Dell Force10 S4810P Configuration Manual

Configure OSPF Stub-Router Advertisement

Configure OSPF Stub-Router Advertisement
When you bring a new router onto an OSPF network, you can configure the router to function as a stub
area by globally reconfiguring the OSPF link cost so that other routers do not use a path that forwards
traffic destined to other networks through the new router for a specified time until the router's switching
and routing functions are up and running, and the routing tables in network routers have converged.
By using the max-metric router-lsa command, you force the link cost of all OSPF non-stub links to the
maximum link cost (65535) for a specified time. The advertisement of this maximum metric causes other
routers to assign a cost to the new router that is higher than the cost of using an alternate path. Because of
the high cost assigned to paths that pass through the new router, other routers will not use a path through
the new router as a transit path to forward traffic to other networks.
Use the max-metric router-lsa command to gracefully shut down or reload a router without dropping
packets destined for other networks.
Command Syntax
max-metric router-lsa
[ on-startup {
announce-time
wait-for-bgp [
wait-time
Note: If you enter the
wait-for-bgp
wait-time
[
742
| Open Shortest Path First (OSPFv2 and OSPFv3)
Command Mode
ROUTER OSPF
|
]}]
max-metric router-lsa
command without an option (
]), the maximum metric of 65535 is always announced in LSAs sent by the router.
is supported on platforms:
Usage
E-Series ExaScale only: Configure the maximum cost of
65535 on a new router so that it always functions as a stub
router in the network and OSPF traffic destined to other
networks is not routed on paths which pass through the
router.
on-startup
announce-time
following boot-up during which the maximum cost
(65535) for transmitting OSPF traffic on router interfaces
is announced in LSAs and the router functions as a stub
router. Range: 5 to 86400 seconds.
on-startup wait-for-bgp [
announce the maximum metric in OSPF LSAs until the
BGP routing table converges with updated routes. Default:
600 seconds.
You can also specify the time (in seconds) that the router
waits for the BGP routing table to converge before it stops
advertising the maximum cost in LSAs and advertises the
router's currently configured OSPF cost. Range: 5 to
86400 seconds.
on-startup announce-time
c e
specifies the time (in seconds)
] enables the router to
wait-time
on-startup
or