Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
A.
show framerelay map
B.
show framerelay lmi
C.
show inter serial
D.
show framerelay pvc
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Question 6031:
Please check your answer for this question. The answer is show interface serial.
Regards,
Timothy
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Answer is A …
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Output:
R1#show frame-relay LMI
LMI Statistics for interface Serial0/1 (Frame Relay DTE) LMI TYPE = CISCO
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 19973 Num Status msgs Rcvd 19972
Num Update Status Rcvd 0 Num Status Timeouts 16
R1#show frame-relay MAP
Serial0/1.102 (up): point-to-point dlci, dlci 102, broadcast, status defined, active
Serial0/1.103 (up): point-to-point dlci, dlci 103, broadcast, status defined, active
I do not see any infromation about encapsulation in show frame-relay map…
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there are two reasons why C is the answer:
1) none of the other commands are valid
2) the LMI type is NOT encapsulation
1841-bott#sh inter serial 0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K Serial
Internet address is 192.168.2.1/24
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY IETF, loopback not set
Keepalive set (10 sec)
CRC checking enabled
LMI enq sent 227, LMI stat recvd 227, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
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From packet-tracer:
WEST#show frame map
Serial0/0/0 (up): ip 10.0.0.1 dlci 201, static, broadcast, CISCO, status defined, active
Serial0/0/0 (up): ip 10.0.0.3 dlci 203, static, broadcast, CISCO, status defined, active
Serial0/0/0 (up): ip 10.0.0.4 dlci 204, static, broadcast, IETF, status defined, active
Command show frame-relay lmi shows only LMI type (CISCO, ANSI, Q933a), not encapsulation type (CISCO, IETF)
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From GNS3:
R2#sh frame map
Serial1/0.201 (up): point-to-point dlci, dlci 201(0xC9,0x3090), broadcast, IETF
status defined, active
Also: http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1918.html#wp1020680
“When connecting Cisco devices with non-Cisco devices, you must use IETF encapsulation on both devices. Check the encapsulation type on the Cisco device with the show frame-relay map exec command.”
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Perfect Answer
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be that as it may, the command in answer A is not show frame-relay map. show inter serial is a valid command which gives the correct answer
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Correct answer is
C.
show inter serial
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From Cisco website:
When connecting Cisco devices with non-Cisco devices, you must use IETF encapsulation on both devices. Check the encapsulation type on the Cisco device with the show frame-relay map exec command.
http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1918.html
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I review some links above and see A is correct answer
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sir can you explain difference between point to point or multipoint configuration of frame relay protocol
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1) correct is “sh frame-relay map”
RouterA#show frame-relay map
Serial0 (up): ip 157.147.3.65 dlci 980(0x3D4,0xF440), dynamic,
broadcast,, status defined, active
#show frame-relay map
Serial0/0/0 (up): ip 10.1.1.2 dlci 102 (0x66, 0x1860), static, broadcast, CISCO, status defined, active
2)# sh interfaces Serial
% Incomplete command.
you need to write to check interface options
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A is correct
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I think if all of you go back you can find out with either A or C.
I looked up CISCO commands and it says map, but looking up interface I found it as well.
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The correct answer is A, show frame relay map.
You can check Table 33 in the following link: http://www.cisco.com/en/US/docs/ios/12_2/wan/command/reference/wrffr4.html#wp1029343
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