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Bandwidth t1 getting only 1/3 of bandwidth

By noris.roche ·
what questions i have to ask and what can i recomend

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I had a similar issue once

by NotSoChiGuy In reply to Bandwidth t1 getting only ...

We had a T3, but weren't realizing anywhere near our expected capacity (even accounting for service overhead).

Turns out it was a combination of two things: the network equipment wasn't setup properly (wasn't my area, so I can't tell you exactly what was wrong) to accommodate the full T3, as well as some work in the area that 'dinged' the circuit, causing severe signal degradation.

So, here are some things you'll want to test prior to calling your service provider (since they'll have you check):

1). Are all cables attached properly (yeah, I know...but still, they'll ask)?
2). Have you performed isolation testing (does the problem only occur with the entire network trying to hit outbound, or can you isolate one resource and replicate the issue...does issues manifest in front/behind firewall)?
3). Is your equipment configured properly?

Assuming you've checked and cleared all that, they'll probably need to do a line test of some sort to try and sniff out the problem.

Good luck!

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Getting 1/3 Bandwidth on a t1

by noris.roche In reply to I had a similar issue onc ...

Thanks for the information. I went ahead and chech the customer router and got this info
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 4/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1725000 bits/sec, 369 packets/sec
5 minute output rate 473000 bits/sec, 381 packets/sec
208426605 packets input, 3084212746 bytes
Received 1726935 broadcasts, 0 runts, 0 giants, 0 throttles
23 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
219201572 packets output, 2558485117 bytes, 0 underruns
0 output errors, 0 collisions, 6 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
he is dropping packets at his side? what is your opinion?

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I'd share this...

by NotSoChiGuy In reply to Getting 1/3 Bandwidth on ...

...info with the data provider, to see if they can run a line diagnostic, and confirm that they setup the line as a full T1, and not a fractional.

Make sure you have the customer's contract handy, too....just in case.

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