Dear group I have a channelized E1 Link,media is microwave.Its controller is flapping continuesly as the logging below.can I check the initiating point of failure. thanks in advance DA 05-16-2001 07:44:48 Local7.Notice 172.18.1.254 3219: %CONTROLLER-5-UPDOWN: Controller E1 5/0, changed state to down 05-16-2001 04:44:05 Local7.Notice 172.18.1.254 3218: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up 05-16-2001 04:44:05 Local7.Error 172.18.1.254 3217: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up 05-16-2001 04:40:26 Local7.Notice 172.18.1.254 3216: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down 05-16-2001 04:40:26 Local7.Error 172.18.1.254 3215: %LINK-3-UPDOWN: Interface Serial1/0, changed state to down 05-16-2001 03:11:36 Local7.Notice 172.18.1.254 3214: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up 05-16-2001 03:11:36 Local7.Error 172.18.1.254 3213: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4810&t=4810 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]