We have similar problems when a T1 circuit fails to one of our remote sites. The link will get the red X, the local router turns orande and the edge device on the remote side becomes red/shadowed, so no down page is sent. ...and as you've said, this behavior is very undesirable. I can understand why the shadowing algorithm was created that way... because the problem is actually seems to be centered at the device closest to the reference point. (link down!) but in my opinion (less than 2 cents), devices should only be shadowed by other red devices, not orange or yellow, or dead links...
In your paging scenario below, I find the solution to page all systems/networks people on switches with servers attached is cleaner. That way, systems people like me can pass the buck to the networks people when someone calls ;) James P. Ashe Systems Analyst 2 ETSU Office of Information Technology [EMAIL PROTECTED] OIT Help Desk - 423.439.4648 > -----Original Message----- > From: Doug Weathers [mailto:[EMAIL PROTECTED] > Sent: Monday, March 17, 2003 2:19 PM > To: [EMAIL PROTECTED] > Subject: Bug (?): shadowing hides failed servers behind > switch port links > > > Hi, > > I'm finding that shadowing is suppressing notification for > failed servers that are plugged into a switch that's also > being monitored by InterMapper. > > If the server is powered off, or the Ethernet cable is > unplugged, the switch reports that the link is down. > InterMapper dutifully marks the link as down and shadows the > server, and no notification is sent. There's no notification > about the failed link, either, so I never get notified at all. > > I'm not sure if this is a bug or not - this is how shadowing > is supposed to work. However, the emergent behavior is > clearly undesireable. > > I can't find a way to set a notification on a link or a > network, which would fix the problem. Maybe I missed it? > > I suppose I could have InterMapper notify me each time the > switch has an alarm condition, but there are usually a number > of unimportant devices plugged into the switches besides the > server(s) I am monitoring. I only want notifications to > happen on the important devices. I suppose I could have a > separate map with only the notification-worthy devices, but > really - shouldn't I be able to do per-device notification? > > Any hints would be welcome. > > As an enhancement request, perhaps the notification algorithm > could be modified to check the notification status of every > shadowed device, and send only the minimum number of pages to > alert everyone. > > For example, let's say that there's a switch A1, managed by > Ann, with three servers B1, B2, and C1 plugged into it, > managed by Beth and Charlene. Each of these devices have a > pager notification attached to them to page the device's manager. > > If someone turns off server B1, Beth should be paged with the > message that her server's behind a dead link. If someone > turns off servers B1 and B2, Beth should be paged twice, once > for each server. (Two separate events.) If someone turns off > all three servers, Beth should receive two pages and Charlene > should receive one. If someone turns off the switch, then > Ann, Beth, and Charlene should each get one page. Ann is > told that the switch is down, and Beth and Charlene are told > that they each have at least one server behind the dead > switch. Ann gets paged first. > > Note that if Ann is managing everything, only one page is > sent to Ann saying that the switch is down. Perhaps the page > should include a list of every device that's down, up to the > size of one pager message. Perhaps it should just say "other > devices affected". > > Would this work for everyone else? Too much paging? Stupid > idea? Outside the scope of InterMapper? > > Thanks, > > Doug > > > -- > Doug Weathers, Network Administrator > St. Charles Medical Center > > > > > ____________________________________________________________________ > List archives: > http://www.mail-archive.com/intermapper-talk%40list.dartware.c om/ To unsubscribe: send email to: [EMAIL PROTECTED] ____________________________________________________________________ List archives: http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ To unsubscribe: send email to: [EMAIL PROTECTED]
