[c-nsp] Serial T1/E1 Card

[Peter Nyamukusa]

On Monday 08 January 2007 20:46, heh heh wrote:
> 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

Why don' you increase the bandwidth to 2048
and are you running any dynamic routing protocols ?

> >
> > #
> >
> > 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/
>
> _______________________________________________
> 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/

Cheers
-- 
Peter Nyamukusa