[c-nsp] short e1 flaps

[George Smith]

Hi,

When checking the logs, I noticed that on two of my routers, there were
logs regarding e1 down/ups.

Oct 18 15:38:37.236: %CONTROLLER-5-UPDOWN: Controller E1 1/0, changed
state to down
Oct 18 15:38:37.236: %CONTROLLER-5-UPDOWN: Controller E1 1/2, changed
state to down
Oct 18 15:38:37.236: %CONTROLLER-5-UPDOWN: Controller E1 1/3, changed
state to down
Oct 18 15:38:37.236: %CONTROLLER-5-UPDOWN: Controller E1 1/7, changed
state to down
Oct 18 15:38:38.236: %CONTROLLER-5-UPDOWN: Controller E1 1/0, changed
state to up
Oct 18 15:38:38.236: %CONTROLLER-5-UPDOWN: Controller E1 1/2, changed
state to up
Oct 18 15:38:38.236: %CONTROLLER-5-UPDOWN: Controller E1 1/3, changed
state to up
Oct 18 15:38:38.236: %CONTROLLER-5-UPDOWN: Controller E1 1/7, changed
state to up

Oct 18 15:38:37.104 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 5/0,
changed state to down
Oct 18 15:38:37.104 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 5/2,
changed state to down
Oct 18 15:38:37.104 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 5/5,
changed state to down
Oct 18 15:38:37.104 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 6/5,
changed state to down
Oct 18 15:38:38.408 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 5/0,
changed state to up
Oct 18 15:38:38.408 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 5/2,
changed state to up
Oct 18 15:38:38.408 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 5/5,
changed state to up
Oct 18 15:38:38.408 GMT+3: %CONTROLLER-5-UPDOWN: Controller E1 6/5,
changed state to up

My guess is the card loses synchronization with telco for a very short
time (<1 sec) and regains synchronization. Is there anybody else out
there experiencing this ?