The primary reason I have used OAM is when a customer has a backup circuit and lets say you use a floating static route. If the remote sight has a problem your ATM interface will stay up thereby negating the usefulness of the floating static route. In ATM as in frame, up an up is only to the repective switch, not the remote device. With OAM enabled the end devices, i.e. routers, communicate with each other as to their status. If they loose a configurable number of OAM cells the interface will declare itself down.
This is also nice for customers that are monitoring their ATM network via SNMP. I'm not quite sure what your concern is when you say it may complicate things, it just allows for the real status of the link to be known. Hope that helps some Dave Chuck Larrieu wrote: > > I'm asking because I don't know the real world answer, and don't have a lot > of real world experience with ATM. > > My reading is that OAM will shut down interfaces when the end to end ATM PVC > fails. Can you explain this in a bit more detail. Is this something you > really want to happen in real world? Wouldn't this complicate things when > the link comes back up? > > Chuck > > ""MADMAN"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > You need to enable OAM. Simply under the PVC add on both end "oam > > enable" > > > > Dave > > > > "[EMAIL PROTECTED]" wrote: > > > > > > How can I detect an ATM link went down? > > > > > > Due to business reason, we are in a process to replace old Frame Relay > > > connections with ATM connections. But when Carrier's ATM network had > > problem > > > and one of the ATM link went down, the router interface attached to it > > still > > > shows up up. For that reason the ISDN backup interface on the same > router > > > wouldn't automatically dial the remote end, and we couldn't meet 7x24 > > > requirement. > > > > > > There was no such problem before switching to ATM. It works perfectly > with > > > FR connections and ISDN DDR Backup. If there was a problem in one of the > FR > > > links, the interface attached to it will go down and the ISDN interface > > will > > > automatically dial the remote end. > > > > > > Is there any way to get around this problem? > > > > > > Thanks in advance. > > > > > > Tony > > > -- > > > > > > __________________________________________________________________ > > > Your favorite stores, helpful shopping tools and great gift ideas. > > > Experience the convenience of buying online with Shop@Netscape! > > > http://shopnow.netscape.com/ > > > > > > Get your own FREE, personal Netscape Mail account today at > > > http://webmail.netscape.com/ > > -- > > David Madland > > Sr. Network Engineer > > CCIE# 2016 > > Qwest Communications Int. Inc. > > [EMAIL PROTECTED] > > 612-664-3367 > > > > "Emotion should reflect reason not guide it" -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=33873&t=33802 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
