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Configuring IP Unicast Routing
Configuring ISO CLNS Routing
DETAILED STEPS
Command Purpose
1. configure terminal Enter global configuration mode.
2. interface interface-id Specify the interface to be configured and enter interface
configuration mode. If the interface is not already configured as a
Layer 3 interface, enter the no switchport command to put it into
Layer 3 mode.
3. no shutdown Enable the interface if necessary. By default, UNIs and ENIs are
disabled and NNIs are enabled.
4. isis metric default-metric
[level-1 | level-2]
(Optional) Configure the metric (or cost) for the specified
interface. The range is from 0 to 63. The default is 10. If no level
is entered, the default is to apply to both Level 1 and Level 2
routers.
5. isis hello-interval {seconds |
minimal} [level-1 | level-2]
(Optional) Specify the length of time between hello packets sent
by the switch. By default, a value three times the hello interval
seconds is advertised as the holdtime in the hello packets sent.
With smaller hello intervals, topological changes are detected
faster, but there is more routing traffic.
minimal—causes the system to compute the hello interval
based on the hello multiplier so that the resulting hold time is
1 second.
seconds—the range is from 1 to 65535. The default is 10
seconds.
6. isis hello-multiplier multiplier
[level-1 | level-2]
(Optional) Specify the number of IS-IS hello packets a neighbor
must miss before the router should declare the adjacency as
down. The range is from 3 to 1000. The default is 3. Using a
smaller hello multiplier causes fast convergence, but can result in
more routing instability.
7. isis csnp-interval seconds
[level-1 | level-2]
(Optional) Configure the IS-IS complete sequence number PDU
(CSNP) interval for the interface. The range is from 0 to 65535.
The default is 10 seconds.
8. isis retransmit-interval seconds (Optional) Configure the number of seconds between
retransmission of IS-IS LSPs for point-to-point links. The value
you specify should be an integer greater than the expected
round-trip delay between any two routers on the network. The
range is from 0 to 65535. The default is 5 seconds.
9. isis retransmit-throttle-interval
milliseconds
(Optional) Configure the IS-IS LSP retransmission throttle interval,
which is the maximum rate (number of milliseconds between
packets) at which IS-IS LSPs will be re-sent on point-to-point
links. The range is from 0 to 65535. The default is determined by
the isis lsp-interval command.
10. isis priority value [level-1 |
level-2]
(Optional) Configure the priority to use for designated router
election. The range is from 0 to 127. The default is 64.
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