Nexus 5600 ip sla feature

[colin.magee]

We have a Nexus 56128 installed as a L3 edge router. We need to track reachability to a remote router. The Nexus 5600 does not currently offer the IP SLA features. Any alternatives to solve this? We need to install a backup route when primary fails.

[InayathUlla Sharieff]

N5K/N6K supports object tracking, but as of NX/OS 7.1, you still can't tie it into static routes and there's no IP SLA.

However, NX/OS 6.0(2)N2(1) did add EEM which can periodically run a python script that does what you want. Attached is RouteTrack.py. Place it in bootflash, run it manually from the CLI to test it out, and then create an EEM applet to run it every few seconds.

Usage:

RouteTrack.py <route> <route_nexthop> [route_vrf] [ping_host [ping_vrf]] [debug]

The simplest form is:

RouteTrack.py 192.168.3.0/24 10.0.0.1

This will add or remove the config command "ip route 192.168.3.0/24 10.0.0.1" based on whether or not 10.0.0.1 is pingable

The script produces syslog messages like these:

2013 Oct 16 19:22:12 N5K-2 %USER-3-SYSTEM_MSG: Removing route vrf management 1.0.0.0/8 to 172.31.51.1 (ping 10.89.169.5 failed) - RouteTrack.py

2013 Oct 16 19:22:31 N5K-2 %USER-3-SYSTEM_MSG: Adding route vrf management  1.0.0.0/8 to 172.31.51.1 (ping 10.89.169.5 success) - RouteTrack.py

[colin.magee]

Thanks for the reply. I do not see the attachment.

[InayathUlla Sharieff]

what attachment??

[ePlusForJHU]

Attached is RouteTrack.py. Where is this attachment?

Colin

[InayathUlla Sharieff]

Plz check the following link it has this :-

https://supportforums.cisco.com/discussion/11719336/ip-sla-nexus-5500-series