We are running mostly Juniper M160, about 20 of them. I have IM 3.6.1 under 
OS9 on a G4 (current up time for IM: 85 days).

We tend to need to upgrade the router software from time to time, at which 
times a routing engine restart changes all the ifIndex values. IM is fairly 
good at matching up circuits to networks after such an event, but it 
doesn't always get it right and sometimes, interfaces just vanish. Unhiding 
hidden ones doesn't show up the lost sheep, and command-k typically doesn't 
find them either. The only solution seems to be to delete and re-add the 
device. This gets a bit old after a while especially as all history data is 
lost too.

1) Is this something which "should not be happening", or are there any 
known problems in this area?

2) Am I missing something simple as a work around?

3) I believe I brought up before about being able to attach datasets to 
interfaces (useful in a case where a line is upgraded), are there any plans 
in this area?

4) Anyone else have this problem or am I the only one in the universe?

Cheers,

___________________________________________________________________
              * *         Tim Streater         Network Engineer
            *     *
           *              Francis House
          *               112 Hills Road       Tel +44 1223 302992
          *               Cambridge CB2 1PQ    Fax +44 1223 303005
       D  A  N  T  E      United Kingdom       WWW http://www.dante.net
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