I want to enable "passive-interface default" on my EIGRP config and specify certain interfaces as "no passive" (presently they are all active). However, when I issue the "passive-interface default" all my interfaces go passive and I must at that time "no passive" the ones I want to work. Doing this remotely causes neighbors to drop and I loose connectivity.
What is the best way to accomplish this change without causing loss of connectivity?
I'm thinking that a "merge" file with "copy tftp run" may be what I need to do.
Thoughts or recommendations?
OK, I tried out my scheme with the small configuration file in flash in my lab, and it worked fine. However, as I thought, it did temporarily lose the adjacencies between the passive-interface default and the no passive-interface commands. (I should mentioned that I had all my EIGRP timers trimed to the absolute minimum 'cos I was testing re-convergence at the time.) But it all came back OK.
Be aware that if you do it on a 2600, as I did, when you TFTP to flash it offers to erase the flash first, with a default of "Yes". Of course, you should say No!