topic Re: Disable port for action - scripting in Scripting

Disable port for action - scripting

treese — Sat, 29 Aug 2020 01:51:05 GMT

I have BFD routing enabled for monitoring a remote site, when the site is unavailable the route hit our FW and flow through VPN. I’m looking for a way to run a script when BFD shows the link down and removes the routes for a script to disable the uplink to the fiber circuit so we can prepare for the link to come back up. All help is appreciated.

Thank you

Re: Disable port for action - scripting

treese — Sat, 29 Aug 2020 02:24:13 GMT

I can get similar result if I can get BFD routing to disable after taking action. If anyone knows how to do this that would be great too.

Re: Disable port for action - scripting

SamPirok — Mon, 31 Aug 2020 22:34:46 GMT

Hi Ted, I’m looking in to this for you but it would help to know what equipment line you’re using. Could you tell me a bit about which products you’re using to set this up?

Re: Disable port for action - scripting

treese — Mon, 31 Aug 2020 22:40:14 GMT

Yes, one are 1 set of DC440 stack and the other Black Diamond 8810 (dual Core - VRRP) between the fiber circuit are DC440’s. Thank you

Re: Disable port for action - scripting

treese — Mon, 31 Aug 2020 22:41:14 GMT

I have this mocked up in my lab right now.

Re: Disable port for action - scripting

SamPirok — Mon, 31 Aug 2020 23:09:17 GMT

Thank you for letting me know. You should be able to do this by triggering a upm script based on a log message from the BFD when the session goes down. These articles don’t cover exactly what you’re doing, but they do cover similar procedures so I wanted to share in case they help:

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-create-an-SNMP-trap-based-on-CPU-utilization-in-EXOS

https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-an-EXOS-switch-to-administratively-down-a-port-if-the-link-goes-down

Re: Disable port for action - scripting

treese — Tue, 01 Sep 2020 01:38:18 GMT

I’ll check these out, I originally thought UPM would work for me but the layer 2 provider link hits to metro E switches and when trouble in the middle my switches don’t see a down port. So UPM on down port won’t work in this situation.

Re: Disable port for action - scripting

treese — Tue, 01 Sep 2020 02:37:07 GMT

No log is written when BFD routing is down too.

Re: Disable port for action - scripting

treese — Thu, 03 Sep 2020 00:54:44 GMT

I was able to get a trap sent when bdf session was down. Trying to find out how UPM can leverage that to disable the far end uplink.

Re: Disable port for action - scripting

treese — Thu, 03 Sep 2020 02:19:15 GMT

Having trouble seeing a log message when BFD goes down. I got it to send a trap but don’t see it in my syslogs. Got any suggestions?

Thanks!