I'm starting to think this might be a bug in 12.2(3). I brought up a new PVC from our hub router to one of our branches. I was noticing really high round trip times, usually over one second when it should be averaging 10ms.
After playing around for a while I noticed that I was only having problems with _every other_ packet. If I only sent one ping it would succeed in about 12 ms. The second ping would get dropped. The third ping would succeed, the fourth would get dropped. To completely bake your noodle, I'll include the output of debug ip packet detail: RNRTH#ping 10.12.10.70 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.12.10.70, timeout is 2 seconds: !.!.! Success rate is 60 percent (3/5), round-trip min/avg/max = 12/12/12 ms RNRTH#un all All possible debugging has been turned off RNRTH#sho log Syslog logging: enabled (0 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns) Console logging: disabled Monitor logging: level debugging, 67 messages logged Buffer logging: level debugging, 539 messages logged Logging Exception size (4096 bytes) Trap logging: level informational, 283 message lines logged Log Buffer (15000 bytes): 6w5d: IP: s=10.12.10.75 (local), d=10.12.10.70 (Serial0/0.19), len 100, sending 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.70 (Serial0/0.19), d=10.12.10.75 (Serial0/0.19), len 100, rcvd 3 6w5d: ICMP type=0, code=0 6w5d: IP: s=10.12.10.75 (local), d=10.12.10.70 (Serial0/0.19), len 100, sending 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.75 (Serial0/0.19), d=10.12.10.70 (Serial0/0.19), len 100, rcvd local pkt 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.75 (local), d=10.12.10.70 (Serial0/0.19), len 100, sending 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.70 (Serial0/0.19), d=10.12.10.75 (Serial0/0.19), len 100, rcvd 3 6w5d: ICMP type=0, code=0 6w5d: IP: s=10.12.10.75 (local), d=10.12.10.70 (Serial0/0.19), len 100, sending 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.75 (Serial0/0.19), d=10.12.10.70 (Serial0/0.19), len 100, rcvd local pkt 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.75 (local), d=10.12.10.70 (Serial0/0.19), len 100, sending 6w5d: ICMP type=8, code=0 6w5d: IP: s=10.12.10.70 (Serial0/0.19), d=10.12.10.75 (Serial0/0.19), len 100, rcvd 3 6w5d: ICMP type=0, code=0 As you can see, the first ping succeeds as you'd expect. But the weird thing is that the next packet we received *is* the packet we just sent! Basically, it appears that somehow, somewhere in the frame cloud my router is having _every other_ packet looped back to itself. Is that not one of the weirdest things you've ever seen?? I'm awaiting a call back from Qwest. They probably won't believe me. I asked someone else here who is more senior than I and he said he's never seen anything like this either. The reason I think it might be a bug is that the local IP address--10.12.10.75--was originally on a different subinterface. I deleted that subinterface and put the IP address on the new interface. I'm wondering if internally it is confused. I'm tempted to reboot it just to find out but I'd really rather not since it's a production router. Okay, back to work. I'll let you all know what I find out. John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36736&t=36736 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]