Priscilla Oppenheimer wrote: > > > > > I logged into the routers and did some ping tests, pinging the > > routers own serial interface I still get the 1% packet loss. > > It may surprise you to learn that when you ping from a router's > serial interface to the router's own serial interface, the > packets actually do go across the serial link. Try turning on > ICMP debug on the other end and you will see that the pings get > there and get redirected back.
By the way, the fact that there's still packet loss when you're pinging yourself, added to the fact that these pings really do go out across the circuit, is more evidence that the fault probably lies in the carrier's network. As others are saying, get the carrier involved. Do some loopbacks with their help. (Do loopbacks still make sense with DS3? I've only worked with DS1). Regardless, I think you've done the requisite testing and swapping on your side. Time to hassle the carrier. Priscilla > > Here's what Marty Atkins, CCIE (some very low number), had to > say about this when it came up before: > > "If the router itself is the source of the packet, and it pings > its own serial IP, and the outbound interface and layer 2 encap > are > resolved and unambiguous, then the router will launch the packet > out that p2p interface or PVC. I have done exactly what > Priscilla > describes, and not only seen the output from "debug ip icmp" on > the > neighbor router, but also observed it generating ICMP > redirects, since > the packet was forwarded out the interface it arrived on! > > This Cisco aberation is extremely useful for troubleshooting > p2p WAN > links. When the path has been looped (line protocol up > (looped)), the > only IP that is pingable is the directly connected one. That > the router actually sends the packet makes it possible to test > the link with ping." > > So it shouldn't surprise you that you see the errors even when > pinging yourself. > > Weird, eh? But helpful to hopefully. > > Priscilla > > > I > > did this on both routers, I thought this might rule out the > > actual line because I'm not pinging across the ds3 connection > > please correct me if i'm wrong. > > > > Somebody asked if scrambling was on but I'm not sure what > > scrambling does or how to check if it's turned on or off so > > i'll look into that too. > > > > > > Thanks for everybody's help and I'm going to spend all day > > checking out what you've said and going through the > > troubleshooting stuff from cisco and i'll let you know how I > > get on. > > > > Anymore advice would be greatly appreciated. > > > > Mark > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65598&t=65491 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
