I was doing a practice lab with a pretty simple frame-relay configuration today, it caused me to go back and do a little review on Frame-relay and ospf network types. Feels silly to go back over that stuff again at this point but I spent an hour and half on it and feel better except for one thing.
The frame-relay on this little practice lab was simple setup, R2, R4 and R5 with R2 as the hub between them. Specified to not change the ospf network type (so it remains non-broadcast). The solution implements subinterfaces on R4 and R5's serial interface. It didn't really say to do that so I'm wondering what the logic might be that I am missing this late night regarding if I should subinterface or not. Usually I subinterface if they tell me to (duh) or if there is some other indication of multiple subnets on the same physical interface - then I will subinterface. Otherwise - am I forgetting another fundamental reason in frame-relay to do subinterfaces? Your thoughts are appreciated. -Mike _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
