Dell Force10 TeraScale C Series, Справочное руководство

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1028 | Open Shortest Path First (OSPFv2 and OSPFv3)
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Parameters
Defaults
Not Configured
Command Modes
ROUTER OSPF
Command
History
Usage
Information
When you bring a new router onto an OSPF network, you can configure the router to function as a stub
router 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). 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 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.
on-startup
announce-time
Enter the time (in seconds) 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
[ wait-time ]
Enable the router to 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.
Version 8.4.2.5 Introduced on C-Series and E-Series TeraScale.
Version 8.4.1.3 Introduced on E-Series ExaScale.
Note:
If you enter the max-metric router-lsa command without an option ( on-startup
announce-time or on-startup wait-for-bgp [ wait-time ]), the maximum metric of 65535 is
always announced in LSAs sent by the router.