24-11
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 24 Configuring NSF with SSO MSFC Redundancy
Using the CLI to Configure NSF/SSO
Verifying IS-IS NSF
To verify IS-IS NSF, you must check that the NSF function is configured on the SSO-enabled networking
device. To verify IS-IS NSF, perform these steps:
Step 1
Verify that “nsf” appears in the IS-IS configuration of the SSO-enabled device by entering the
show
running-config
command. The display will show either the Cisco IS-IS or the IETF IS-IS configuration.
This example indicates that the device uses the Cisco implementation of IS-IS NSF:
Router#
show running-config
<...Output Truncated...>
router isis
nsf cisco
<...Output Truncated...>
Step 2
If the NSF configuration is set to
cisco
, enter the
show isis nsf
command to verify that NSF is enabled
on the device. Using the Cisco configuration, the display output will be different on the active and
redundant MSFCs (RPs). This example shows the sample output for the Cisco configuration on the
active MSFC (RP). In this example, note the presence of “NSF restart enabled”:
router#
show isis nsf
NSF is ENABLED, mode 'cisco'
RP is ACTIVE, standby ready, bulk sync complete
NSF interval timer expired (NSF restart enabled)
Checkpointing enabled, no errors
Step 3
Enable NSF operation for IS-IS.
Enter the
ietf
keyword to enable IS-IS in a
homogeneous network where adjacencies with
networking devices supporting IETF draft-based
restartability is guaranteed.
Enter the
cisco
keyword to run IS-IS in
heterogeneous networks that might not have
adjacencies with NSF-aware networking devices.
Router(config-router)#
nsf
[
cisco
|
ietf
]
Step 4
(Optional) Specify the minimum time between
NSF restart attempts. The default time between
consecutive
NSF restart attempts is 5 minutes.
Router(config-router)#
nsf
interval
[
minutes
]
Step 5
(Optional) Specify the time that IS-IS will wait for
the IS-IS database to synchronize before
generating overloaded link-state information for
itself and flooding that information out to its
neighbors.
The
t3
keyword applies only if you selected IETF
operation. When you specify
adjacency
, the
router that is restarting obtains its wait time from
neighboring devices.
Router(config-router)#
nsf
t3
{
manual
[
seconds
] |
adjacency
}
Step 6
(Optional) Specify how long an IS-IS NSF restart
will wait for all interfaces with IS-IS adjacencies
to come up before completing the restart. The
default is 10 seconds.
Router(config-router)#
nsf interface wait
seconds
Purpose
Command
