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224 Summit 200 Series Switch Installation and User Guide
Interior Gateway Routing Protocols
config ospf vlan <vlan> timer <rxmtinterval>
<transitdelay> <hellointerval>
<routerdeadinterval> [<waitinterval>]
Configures the OSPF wait interval. Specify the
following:
• rxmtinterval—The length of time that
the router waits before retransmitting an
LSA that is not acknowledged. If you set an
interval that is too short, unnecessary
retransmissions will result. The default value
is 5 seconds.
• transitdelay—The length of time it takes
to transmit an LSA packet over the
interface. The transit delay must be greater
than 0.
• hellointerval—The interval at which
routers send hello packets. Smaller times
allow routers to discover each other more
quickly, but also increase network traffic.
The default value is 10 seconds.
• routerdeadinterval—The interval after
which a neighboring router is declared down
due to the fact that hello packets are no
longer received from the neighbor. This
interval should be a multiple of the hello
interval. The default value is 40 seconds.
• waitinterval—The interval between the
interface coming up and the election of the
DR and BDR. This interval is required by
the OSPF standard to be equal to the
routerdeadinterval. Under some
circumstances, setting the waitinterval
to smaller values can help OSPF routers on
a broadcast network to synchronize more
quickly at the expense of possibly electing
an incorrect DR or BDR. This value should
not be set to less than the
hellointerval. The default value is
equal to the routerdeadinterval.
create ospf area <areaid> Creates an OSPF area. Area 0 does not need
to be created. It exists by default.
disable ospf capability opaque-lsa Disables OSPF opaque LSA support.
enable ospf Enables OSPF process for the router.
enable ospf capability opaque-lsa Enables OSPF opaque LSA support.
enable ospf export direct [cost <metric>
[ase-type-1 | ase-type-2] {tag <number>}]
Enables the distribution of local interface
(direct) routes into the OSPF domain. Once
enabled, the OSPF router is considered to be
an ASBR. The default tag number is 0. The
default setting is disabled. Interface routes
which correspond to the interface that has
OSPF enabled are ignored.
enable ospf export rip [cost <metric>
[ase-type-1 | ase-type-2] {tag <number>}]
Enables the distribution of RIP routes into the
OSPF domain. Once enabled, the OSPF router
is considered to be an ASBR. The default tag
number is 0. The default setting is disabled.
Table 66: OSPF Configuration Commands (continued)
Command Description