*Some* CRCs and Input errors are normal on circuits.... After clearing counters and issuing the 'sh int' command, you have way too many.
Reliability is a measurement that some routing protocols use to determine which link to take if multiple paths exist to a given destination. It should be 255/255 (indicating 100% uptime). Whenever a circuit flaps for any reason, reliability is decremented by 1. Your circuit has gone up and down several times it looks like. Hard to say where the issue lies, but I would first give your carrier a call and have them run intrusive testing on the circuit (since no one can use it anyway). Have them test *through* the CSU to the CPE side of the DMarc. In fact, if they'll do it, have them loop up the T1 controller on your router and run testing to that. If it's a carrier issue, this will find it. What kind of DMarc extension are you running? Is the router right next to the Smart Jack? Can you swap cables? Just some thoughts... HTH, Aaron T. Rohyans Senior Network Engineer CCIE #21945, CCSP, CCNA, CQS-Firewall, CQS-IPS, CQS-VPN, ISSP, CISP, JNCIA-ER DPSciences Corporation 7400 N. Shadeland Ave., Suite 245 Indianapolis, IN 46250 Office: (317) 348-0099 Fax: (317) 849-7134 arohy...@dpsciences.com <mailto:arohy...@dpsciences.com> http://www.dpsciences.com/ <http://www.dpsciences.com/> From: David Mazzaccaro [mailto:david.mazzacc...@hudsonhhc.com] Sent: Thursday, October 29, 2009 12:17 PM To: NT System Admin Issues Subject: RE: Cisco sho int (reliabilty) I just cleared the counters, and now see: Received 135 broadcasts, 0 runts, 0 giants, 0 throttles 258862 input errors, 172196 CRC, 86489 frame, 0 overrun, 0 ignored, 177 abort 38629 packets output, 3695862 bytes, 0 underruns Not a cisco expert here, but can this tell if the problem points to the carrier or my equipment? ________________________________ From: David Mazzaccaro [mailto:david.mazzacc...@hudsonhhc.com] Sent: Thursday, October 29, 2009 12:12 PM To: NT System Admin Issues Subject: Cisco sho int (reliabilty) When I do a "sho int serial0", I get this: reliability 138/255, txload 2/255, rxload 1/255 I assume the reliability should always be 255/255, unless there is a problem? Users are can't get into any applications over this circuit. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
