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9-22
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 9 Configuring IS-IS
Configuring IS-IS
The following example shows how to limit the number of redistributed routes into IS-IS:
switch# config t
switch(config)# router eigrp isis Enterprise
switch(config-router)# redistribute bgp route-map FilterExternalBGP
switch(config-router)# redistribute maximum-prefix 1000 75
Configuring a Graceful Restart
You can configure a graceful restart for IS-IS.
BEFORE YOU BEGIN
Ensure that you have enabled the IS-IS feature (see the “Enabling the IS-IS Feature” section on
page 9-7).
Create the VDCs and VRFs.
Ensure that you are in the correct VDC (or use the switchto vdc command).
SUMMARY STEPS
1. config t
2. router isis instance-tag
3. graceful-restart
4. graceful-restart t3 manual time
Step 4
redistribute maximum-prefix
max
[
threshold
] [warning-only | withdraw
[
num-retries
timeout
]]
Example:
switch(config-router)# redistribute
maximum-prefix 1000 75 warning-only
Specifies a maximum number of prefixes that IS-IS
will distribute. The range is from 0 to 65536.
Optionally specifies the following:
• threshold—Percent of maximum prefixes that will
trigger a warning message.
• warning-only—Logs an warning message when
the maximum number of prefixes is exceeded.
• withdraw—Withdraws all redistributed routes.
Optionally tries to retrieve the redistributed
routes. The num-retries range is from 1 to 12. The
timeout is 60 to 600 seconds. The default is 300
seconds. Use clear isis redistribution if all routes
are withdrawn.
Step 5
show running-config isis
Example:
switch(config-router)# show
running-config isis
(Optional) Displays the IS-IS configuration.
Step 6
copy running-config startup-config
Example:
switch(config-router)# copy
running-config startup-config
(Optional) Saves this configuration change.
Command Purpose
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