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Lab – Configuring Frame Relay and Subinterfaces
© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. Page 14 of 38
Step 4: Change the LMI type.
a. Issue the frame-relay lmi-type ansi command on interface S0/0/1 on R3.
R3(config-if)# frame-relay lmi-type ansi
b. After at least 60 seconds, issue the show interfaces s0/0/1 command on R3. When 60 seconds have
passed, the interface changes its state to up, then down, because R3 is expecting ANSI LMI, and FR is
sending Cisco LMI.
R3# show interfaces s0/0/1
Serial0/0/1 is up, line protocol is down
Hardware is WIC MBRD Serial
Internet address is 10.1.1.2/30
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, loopback not set
Keepalive set (10 sec)
LMI enq sent 2157, LMI stat recvd 2136, LMI upd recvd 0, DTE LMI down
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE segmentation inactive
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 733/0, interface broadcast
<output omitted>
c. On R3, issue the show frame-relay lmi command to display LMI information, including LMI type, number
of timeouts, and the amount of time since the last full update.
R3# show frame-relay lmi
LMI Statistics for interface Serial0/0/1 (Frame Relay DTE) LMI TYPE = ANSI
Invalid Unnumbered info 0 Invalid Prot Disc 0
Invalid dummy Call Ref 0 Invalid Msg Type 0
Invalid Status Message 0 Invalid Lock Shift 0
Invalid Information ID 0 Invalid Report IE Len 0
Invalid Report Request 0 Invalid Keep IE Len 0
Num Status Enq. Sent 2158 Num Status msgs Rcvd 2136
Num Update Status Rcvd 0 Num Status Timeouts 23
Last Full Status Req 00:00:05 Last Full Status Rcvd 00:04:35
d. On R3, issue the debug frame-relay lmi command. The LMI packets no longer display in pairs. While all
outgoing LMI messages are logged, no incoming messages display because R3 is expecting ANSI LMI,
and FR is sending Cisco LMI.
R3# debug frame-relay lmi
Frame Relay LMI debugging is on
Displaying all Frame Relay LMI data
R3#
*Jun 26 21:49:10.829: Serial0/0/1(out): StEnq, myseq 104, yourseen 0, DTE down
*Jun 26 21:49:10.829: datagramstart = 0xC313554, datagramsize = 14
*Jun 26 21:49:10.829: FR encap = 0x00010308
*Jun 26 21:49:10.829: 00 75 95 01 01 00 03 02 68 00
*Jun 26 21:49:10.829:
R3#
*Jun 26 21:49:20.829: Serial0/0/1(out): StEnq, myseq 105, yourseen 0, DTE down