Frame Relay

dentrydentry Member Posts: 42 ■■□□□□□□□□
So im using the v3.o topology. I am using all Vwic-MFT's. I have my t1's working properly, I can receive calls between the PSTN from the various sites. However im not entirely sure exactly what the Frame Relay is for. All my Frame relay interfaces are showing up/up and green. Here is a show int on one of the interfaces

R1#show interface Serial0/3/1:0
Serial0/3/1:0 is up, line protocol is up
Hardware is GT96K Serial
Description: ***Data to PSTN***
MTU 1500 bytes, BW 1536 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)
LMI enq sent 1560, LMI stat recvd 1561, LMI upd recvd 0, DTE LMI up
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 0/0, interface broadcasts 0
Last input 00:00:08, output 00:00:08, output hang never
Last clearing of "show interface" counters 04:20:08
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1152 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1561 packets input, 22559 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1563 packets output, 21880 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Timeslot(s) Used:1-24, SCC: 1, Transmitter delay is 0 flags

Show frame relay map/route/pvc provide no information at all.

Frame Relay statistics:
ARP requests sent 0, ARP replies sent 0
ARP request recvd 0, ARP replies recvd 0

R1#show frame-relay lmi
LMI Statistics for interface Serial0/3/1:0 (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 1575 Num Status msgs Rcvd 1576
Num Update Status Rcvd 0 Num Status Timeouts 0
Last Full Status Req 00:00:33 Last Full Status Rcvd 00:00:33

I want to do the labs in the back of the Cvoice book, but am starting to think the frame relay is going to mess them up. Any advice ?


  • shodownshodown Member Posts: 2,271
    Frame relay is a WAN technology. Its used for you to call in-between other sites so you don't have to use the PSTN for calling. While long distance rates are way down, this its still useful to use the Wan for international sites, TEHO, and centralized call control.
    Currently Reading

    CUCM SRND 9x/10, UCCX SRND 10x, QOS SRND, SIP Trunking Guide, anything contact center related
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