We’re an Avaya voice shop (for now if I have my way) and have Avaya systems of various sizes and shapes all around the Enterprise.  I was at one of our remote locations a few weeks back and helped the guys there replace a non-PoE switch so they could get the old power injector panel out of their rack.  When we moved stuff around, the phones didn’t come back and had the dreaded DHCP Ack Error.

More of my IIUC study notes.  As always, feel free to correct.  I really need to have a real post, don’t I?

show voice port summary

• Shows the voice ports available for use

R1#show voice port summary
                                          IN       OUT
PORT           CH   SIG-TYPE   ADMIN OPER STATUS   STATUS   EC
============== == ============ ===== ==== ======== ======== ==
50/0/1         1      efxs     up    up   on-hook  idle     y
50/0/1         2      efxs     up    up   on-hook  idle     y
50/0/2         1      efxs     up    up   on-hook  idle     y
50/0/2         2      efxs     up    up   on-hook  idle     y
50/0/3         1      efxs     up    up   on-hook  idle     y
50/0/4         1      efxs     up    up   on-hook  idle     y
50/0/5         1      efxs     up    up   on-hook  idle     y

• An ephone-dn shows up as efxs, so all these are ephone-dns.
• Channels are numbered 0-23; timeslots are numbered 1-24

FXS Ports

Did you guys have any trouble with the solution to the STP exercise?  Let’s work through it and see what happens.  I got a few responses to the solution, and everyone seems to get the same answer, so I assume we’re all right.

Before we get started, I wanted to mention the tie breakers since there can be ties in STP.  If there is a tie in any calculation, the same tie breakers are used, so I’ll list them here to use as we move through the calculations.