11-05-2007 09:50 AM - edited 03-03-2019 07:25 PM
Hi, I have T1 connected to the internet, but for some reason the encapsulation is set for frame relay. I find this unusual since it is not connecting to any other branches. I am asking this because I find this T1 connection kind of slow and I wonder if this T1 is dropping frames due to the CIR. I am new to the company so I don't know the history why was it done that way. Shouldn't I switch this T1 to PPP or HDLC? Any help would be appriciated. Thanks
11-05-2007 09:54 AM
Hi,
likely you can't just switch switch to PPP or HDLC.
This is because you ISP is giving you service over FR, they do so for saving on both leased circuits, and router ports (they are aggregating multiple customers over a single router interface).
You may find that using a dedicated line may have you incur in higher charges.
11-05-2007 09:55 AM
Bart
Am I correct in understanding your message that traffic is flowing over this link - but slowly? If so then whatever is connected to the other end of the link is running Frame Relay encapsulation. If you change your end to HDLC or to PPP and the other end does not change then there will be NO traffic flowing over the link.
It might be interesting to see the output of show frame pvc so we could understand better what is running on the link.
HTH
Rick
11-05-2007 10:05 AM
Yes I do understand that the link will go down if the encap. does not match at the other side. This T1 is connected to the internet and not to any of my other branches.
Here are the outputs: Thanks again!!!!
show frame relay pvc
PVC Statistics for interface Serial0/3/0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 0 0 0 0
DLCI = 500, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0/3/0.500
input pkts 6520966 output pkts 8058527 in bytes 3510575659
out bytes 2545960682 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 589681 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 0 out bcast bytes 0
5 minute input rate 399000 bits/sec, 42 packets/sec
5 minute output rate 35000 bits/sec, 27 packets/sec
pvc create time 18w3d, last time pvc status changed 18w3d
VSA-2851-13#
show frame relay traffic
VSA-2851-13#show frame-relay traffic
Frame Relay statistics:
ARP requests sent 0, ARP replies sent 0
ARP request recvd 0, ARP replies recvd 0
VSA-2851-13#show int s 0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
MTU 4470 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 192/255, rxload 237/255
Encapsulation FRAME-RELAY IETF, loopback not set
Keepalive set (10 sec)
LMI enq sent 51036, LMI stat recvd 51036, 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
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 5d21h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 8
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1437000 bits/sec, 172 packets/sec
5 minute output rate 1168000 bits/sec, 195 packets/sec
20788541 packets input, 18595317 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
18408432 packets output, 3368921077 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
11-05-2007 10:27 AM
Bart
Thanks for posting the additional output. This clearly shows an active Frame Relay link, with 1 active PVC, and 1 active subinterface (which was not mentioned in previous posts). As currently configured it is working. and the receive load
reliability 255/255, txload 192/255, rxload 237/255
may help explain why it is a bit slow. It appeaers to be getting close to being saturated.
If you want to change it from Frame Relay to HDLC or PPP then you would need to request from whoever provides the line that they change their end. You might find that the pricing for an HDLC service or a PPP service would be different from the pricing of the Frame Relay service.
HTH
Rick
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