Solved: Interface?BGP Flapping

sunilsu45 · ‎06-03-2015

Hi Folks,

I need small clarification on logs. Per logs I can see that interface and BGP were flapping.

could anyone clarify is an issue with interface or BGP?

Jun 3 07:44:51 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

Jun 3 07:44:53 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 07:44:53 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Down Interface flap

.Jun 3 07:44:54 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down

.Jun 3 07:45:10 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 07:45:12 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 07:45:15 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to up

.Jun 3 07:45:19 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 07:45:21 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 07:45:22 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down

.Jun 3 07:45:54 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 07:45:55 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 07:46:04 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to up

.Jun 3 07:46:25 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Up

.Jun 3 07:46:52 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 07:46:54 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 07:46:54 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Down Interface flap

.Jun 3 07:46:55 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down

.Jun 3 07:46:55 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 07:46:57 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 07:47:00 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to up

.Jun 3 07:47:12 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Up

.Jun 3 07:47:33 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 07:47:35 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 07:47:35 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Down Interface flap

.Jun 3 07:47:36 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down

.Jun 3 07:47:44 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 07:47:46 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 07:47:49 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to up

.Jun 3 07:47:55 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Up

Jun 3 08:19:18 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

Jun 3 08:19:20 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 08:19:20 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Down Interface flap

.Jun 3 08:19:21 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down

.Jun 3 08:19:32 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 08:19:34 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 08:19:49 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 08:19:50 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 08:19:52 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to up

.Jun 3 08:20:10 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Up

.Jun 3 08:20:20 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 08:20:22 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 08:20:22 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Down Interface flap

.Jun 3 08:20:23 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to down

.Jun 3 08:22:14 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 08:22:16 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 08:22:19 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 08:22:21 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 08:22:36 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 08:22:38 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 08:22:41 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (AIS detected)

.Jun 3 08:22:43 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down

.Jun 3 09:31:26 CEST: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up

.Jun 3 09:31:28 CEST: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up

.Jun 3 09:31:37 CEST: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0:0, changed state to up

.Jun 3 09:31:44 CEST: %BGP-5-ADJCHANGE: neighbor 192.168.20.174 Up

Bilal Nawaz · ‎06-03-2015

Looks like problem with the interface - I would check physical cabling make sure it is OK, then contact circuit provider to raise a problem ticket for them to investigate interface flap. (if you are using a carrier) Most likely BGP is flapping because of the interface flap.

Please rate useful posts & remember to mark any solved questions as answered. Thank you.

View solution in original post

Bilal Nawaz · ‎06-03-2015

Looks like problem with the interface - I would check physical cabling make sure it is OK, then contact circuit provider to raise a problem ticket for them to investigate interface flap. (if you are using a carrier) Most likely BGP is flapping because of the interface flap.

Please rate useful posts & remember to mark any solved questions as answered. Thank you.