[c-nsp] Serial T1/E1 Card

[heh heh]

You might be getting micro burst that are filling up the pipe. Change your
load interval (load-interval 30). That will allow you to see what is happen
too.ing in 30 sec increments instead of 5 min averages.

The bandwidth is informational with some routing protocols making use of it.

Aaron

On 1/8/07, William <willay at gmail.com> wrote:
>
> Hi List,
>
> Hopefully just a quick one, I'm currently investigating an issue where
> we seem to be maxing out on our 2Mb circuit (E1 - I'm based in London)
> at roughly 1.54Mb (Used an app to poll the interface every 2 seconds
> via snmp) - I found this very strange because its the theoretical
> maximum speed of a T1 circuit, but as we all know we shouldn't have
> them type of circuits over here in the UK!
>
> I've spoken to BT who provide the circuit and have confirmed that its
> an 2Mb circuit, I have the following serial card in my Cisco 2600
> router:
>
> !Slot 0/0: type Serial 1T WAN
> !Slot 0/0: hvers 1.0 rev J0
> !Slot 0/0: part 800-01514-01, serial 24024110
>
> The following is show int serial0/0 from the router on our end:
>
> #sh int serial0/0
> Serial0/0 is up, line protocol is up
>   Hardware is PowerQUICC Serial
>   Internet address is removed.
>   MTU 1500 bytes, BW 1948 Kbit, DLY 20000 usec,
>      reliability 255/255, txload 9/255, rxload 33/255
>   Encapsulation HDLC, loopback not set
>   Keepalive set (10 sec)
>   Last input 00:00:05, output 00:00:00, output hang never
>   Last clearing of "show interface" counters 07:11:38
>   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 259000 bits/sec, 300 packets/sec
>   5 minute output rate 69000 bits/sec, 177 packets/sec
>      5555260 packets input, 734437370 bytes, 0 no buffer
>      Received 3021 broadcasts, 0 runts, 0 giants, 0 throttles
>      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
>      3473051 packets output, 184796888 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
>
> Configuration for the interface looks like:
>
> #show run int serial0/0
> Building configuration...
>
> Current configuration : 135 bytes
> !
> interface Serial0/0
> bandwidth 1948
> ip address removed
> no fair-queue
> end
>
> #
>
> I'm also under the impression that the bandwidth 1948 statement is
> purely informational?
>
> Just after a sanity check from you guys, I've got to speak to the guys
> on the other end of the circuit to ensure they aren't running any
> funky limiting on their end (unlikely). Is the card that I have in my
> router is it capable of 2Mb? In the past I've bought cards that are
> compatibile with both T1/E1 lines (NM-1CE1T1_PRI for example).
>
> Thanks for your time.
>
> Will
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>