Integrated Services Digital Network (ISDN)
531
The Debug Frame LMI Command
The debug frame lmi command will show output on the router consoles by
default. The information from this command will allow you to verify and
troubleshoot the Frame Relay connection by helping you to determine whether
the router and switch are exchanging the correct LMI information.
Router#debug frame-relay lmi
Serial3/1(in): Status, myseq 214
RT IE 1, length 1, type 0
KA IE 3, length 2, yourseq 214, myseq 214
PVC IE 0x7 , length 0x6 , dlci 130, status 0x2 , bw 0
Serial3/1(out): StEnq, myseq 215, yourseen 214, DTE up
datagramstart = 0x1959DF4, datagramsize = 13
FR encap = 0xFCF10309
00 75 01 01 01 03 02 D7 D6
Serial3/1(in): Status, myseq 215
RT IE 1, length 1, type 1
KA IE 3, length 2, yourseq 215, myseq 215
Serial3/1(out): StEnq, myseq 216, yourseen 215, DTE up
datagramstart = 0x1959DF4, datagramsize = 13
FR encap = 0xFCF10309
00 75 01 01 01 03 02 D8 D7
Integrated Services Digital Network (ISDN)
I
ntegrated Services Digital Network (ISDN) is a digital service designed
to run over existing telephone networks. ISDN can support both data and
voice--a telecommuter's dream. But ISDN applications require bandwidth.
Typical ISDN applications and implementations include high-speed image
applications (such as Group IV facsimile), high-speed file transfer, videocon-
ferencing, and multiple links into homes of telecommuters.
ISDN is actually a set of communication protocols proposed by telephone
companies that allows them to carry a group of digital services that simul-
taneously convey data, text, voice, music, graphics, and video to end users,
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