RE: HDLC, line protocols, and keepalives. [7:62928]
As usual, you were absolutely correct Pricilla! The part which I didn't mention (because, for some reason, I figured that it was unimportant) was that this is an HDLC circuit going to my provider for a VPN circuit. They have a Nortel Shasta 5000 (essentially an IP multi-service edge router) and the tech confirmed that they do not have keepalives set on it. Thank you very much for your expertise! Geoff Mossburg -Original Message- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 12, 2003 11:02 PM To: [EMAIL PROTECTED] Subject: RE: HDLC, line protocols, and keepalives. [7:62928] It sure sounds like your service provider isn't using keepalives, i.e. has no keepalive configured on their serial interface. Both ends have to either be using keepalives or not, with the same timer. You would think that they would checked that, but the symptoms point to that being the problem. Let us know if that's not the case, though. In fact, let us know if you find out that it is the case! Thanks. Priscilla Mossburg, Geoff (MAN-Corporate) wrote: All, I'm having a problem that I don't understand and I was hoping someone out there might be able to give me some insight. I have a 2503 with an HDLC connection on Serial0 going out to my service provider. The running-config is very basic (sanitized, of course): version 11.2 ! ip subnet-zero ! interface Serial0 ip address x.x.x.18 255.255.255.252 keepalive 9 no fair-queue ! interface Serial1 shutdown ! interface BRI0 no ip address shutdown ! router eigrp 100 network 10.0.0.0 ! no ip classless ! bridge 11 protocol ieee end The problem I am having is that the line protocol is bouncing, but neither my provider nor I can find a problem. I have swapped all the cables AND the router, but the problem persists. I noticed that the line protocol goes down for 9 seconds, then is up for 18 seconds, then the cycle repeats. For SG, I lowered the keepalives to 2 seconds; sure enough, the line protocol dropped for 2 seconds, then was up for 4. By removing keepalives altogether, the circuit stays up! What is going on here? Am I missing something painfully obvious? Thanks! Geoff Mossburg Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62988t=62928 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HDLC, line protocols, and keepalives. [7:62928]
All, I'm having a problem that I don't understand and I was hoping someone out there might be able to give me some insight. I have a 2503 with an HDLC connection on Serial0 going out to my service provider. The running-config is very basic (sanitized, of course): version 11.2 ! ip subnet-zero ! interface Serial0 ip address x.x.x.18 255.255.255.252 keepalive 9 no fair-queue ! interface Serial1 shutdown ! interface BRI0 no ip address shutdown ! router eigrp 100 network 10.0.0.0 ! no ip classless ! bridge 11 protocol ieee end The problem I am having is that the line protocol is bouncing, but neither my provider nor I can find a problem. I have swapped all the cables AND the router, but the problem persists. I noticed that the line protocol goes down for 9 seconds, then is up for 18 seconds, then the cycle repeats. For SG, I lowered the keepalives to 2 seconds; sure enough, the line protocol dropped for 2 seconds, then was up for 4. By removing keepalives altogether, the circuit stays up! What is going on here? Am I missing something painfully obvious? Thanks! Geoff Mossburg Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62928t=62928 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HDLC, line protocols, and keepalives. [7:62928]
It sure sounds like your service provider isn't using keepalives, i.e. has no keepalive configured on their serial interface. Both ends have to either be using keepalives or not, with the same timer. You would think that they would checked that, but the symptoms point to that being the problem. Let us know if that's not the case, though. In fact, let us know if you find out that it is the case! Thanks. Priscilla Mossburg, Geoff (MAN-Corporate) wrote: All, I'm having a problem that I don't understand and I was hoping someone out there might be able to give me some insight. I have a 2503 with an HDLC connection on Serial0 going out to my service provider. The running-config is very basic (sanitized, of course): version 11.2 ! ip subnet-zero ! interface Serial0 ip address x.x.x.18 255.255.255.252 keepalive 9 no fair-queue ! interface Serial1 shutdown ! interface BRI0 no ip address shutdown ! router eigrp 100 network 10.0.0.0 ! no ip classless ! bridge 11 protocol ieee end The problem I am having is that the line protocol is bouncing, but neither my provider nor I can find a problem. I have swapped all the cables AND the router, but the problem persists. I noticed that the line protocol goes down for 9 seconds, then is up for 18 seconds, then the cycle repeats. For SG, I lowered the keepalives to 2 seconds; sure enough, the line protocol dropped for 2 seconds, then was up for 4. By removing keepalives altogether, the circuit stays up! What is going on here? Am I missing something painfully obvious? Thanks! Geoff Mossburg Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62935t=62928 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
