Filter
Top Products
IP Routing Commands
4-271
4
propagation delays. LSAs have their age incremented by this amount
before transmission. This value must be the same for all routers attached
to an autonomous system. (Range: 1-3600 seconds; Default: 1 seconds)
• dead-interval seconds - Specifies the time that neighbor routers will wait
for a hello packet before they declare the router down. This value must be
the same for all routers attached to an autonomous system.
(Range: 1-65535 seconds; Default: 4 x hello interval, or 40 seconds)
• authentication-key key - Sets a plain text password (up to 8 characters)
that is used by neighboring routers on a virtual link to generate or verify the
authentication field in protocol message headers. A separate password can
be assigned to each network interface. However, this key must be the same
for all neighboring routers on the same network (i.e., autonomous system).
This key is only used when authentication is enabled for the backbone.
• message-digest-key key-id md5 key - Sets the key identifier and
password to be used to authenticate protocol messages passed between
neighboring routers and this router when using message digest (MD5)
authentication. The key-id is an integer from 1-255, and the key is an
alphanumeric string up to 16 characters long. If MD5 authentication is used
on a virtual link, then it must be enabled on all routers within an autonomous
system; and the key identifier and key must also be the same for all routers.
Command Mode
Router Configuration
Default Setting
area-id: None
router-id: None
hello-interval: 10 seconds
retransmit-interval: 5 seconds
transmit-delay: 1 second
dead-interval: 40 seconds
authentication-key: None
message-digest-key: None
Command Usage
• All areas must be connected to a backbone area (0.0.0.0) to maintain routing
connectivity throughout the autonomous system. If it not possible to physically
connect an area to the backbone, you can use a virtual link. A virtual link can
provide a logical path to the backbone for an isolated area. You can specify
up to 32 virtual links on this router.
• Any area disconnected from the backbone must include the transit area ID
and the router ID for a virtual link neighbor that is adjacent to the backbone.
• This router supports up 64 virtual links.