In addition to configuring SSO, the following considerations must be made
for all protocols configured on the MLS when SSO with NSF is implemented.

- Configuring and verify Multicast MLS NSF with SSO
- Configuring and verify BGP NSF
- Configuring and verify OSPF NSF
- Configuring and verify IS-IS NSF
- Configuring and verify EIGRP NSF
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CAUTION:
Full NSF support requires NSF configuration steps for all routing
protocols running at the time of failover.
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Example: NSF Configuration for EIGRP
To configure NSF for EIGRP,
use the following commands beginning in privileged EXEC mode.

Verifying EIGRP for NSF
To verify NSF for EIGRP, you must check
that the NSF function is configured on the SSO-enabled networking device. To
verify EIGRP NSF, follow these steps:
Step 1 Verify that
"nsf" appears in the EIGRP configuration of the SSO-enabled device by
entering the show running-config command:
Router#show running-config
router eigrp
100
auto-summary
nsf
Step 2 Use the show ip protocols command to
verify that NSF is enabled on the device:
router#show
ip protocols
*** IP Routing is NSF
aware ***
Routing Protocol is "eigrp
100"
Outgoing update filter list for all interfaces is
not set
...
EIGRP NSF-aware route hold timer
is 240s
EIGRP NSF enabled
NSF signal timer is
20s
NSF converge timer is 120s
Automatic
network summarization is in effect
Maximum path:
4
Routing for Networks:
Routing Information
Sources:
Gateway Distance Last
Update
Distance: internal 90 external 170