06-01-2005 06:14 AM - edited 03-03-2019 09:42 AM
Hi All,
I have an E1 network module (NM-2CE1U=) in my router (c3640).
I configured a leased line from timeslot 1 to 30.
The question is why the router says this:
Available Bandwidth 1440 kilobits/sec
the controller config:
controller E1 3/1
channel-group 1 timeslots 1-30
the interface config:
interface Serial3/1:1
description 1920 kbps
bandwidth 1920
ip address 192.168.11.29 255.255.255.252
no ip route-cache cef
no cdp enable
sh int ser3/1:1
Serial3/1:1 is up, line protocol is up
Hardware is DSX1
Description: 1920 kbps
Internet address is 192.168.11.29/30
MTU 1500 bytes, BW 1920 Kbit, DLY 20000 usec,
reliability 255/255, txload 67/255, rxload 9/255
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 20w0d
Input queue: 0/75/4029/0 (size/max/drops/flushes); Total output drops: 10429
Queueing strategy: weighted fair
Output queue: 0/1000/64/4799 (size/max total/threshold/drops)
Conversations 0/23/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1440 kilobits/sec
5 minute input rate 69000 bits/sec, 39 packets/sec
5 minute output rate 505000 bits/sec, 74 packets/sec
14033195 packets input, 472113071 bytes, 0 no buffer
Received 51780 broadcasts, 279 runts, 0 giants, 0 throttles
4032 input errors, 2538 CRC, 1497 frame, 0 overrun, 0 ignored, 263 abort
20795275 packets output, 497192000 bytes, 0 underruns
0 output errors, 0 collisions, 426 interface resets
0 output buffer failures, 0 output buffers swapped out
313 carrier transitions
Timeslot(s) Used:1-30, Transmitter delay is 0 flags
Solved! Go to Solution.
06-01-2005 06:37 AM
The "available bandwidth" is only the router's guess, allowing a very approximate 25% overhead for routing protocols etc. In truth, if you are not running any routing protocols, you could probably get much closer to the 1920 kbps of data traffic out of it.
Kevin Dorrell
Luxembourg
06-01-2005 06:37 AM
The "available bandwidth" is only the router's guess, allowing a very approximate 25% overhead for routing protocols etc. In truth, if you are not running any routing protocols, you could probably get much closer to the 1920 kbps of data traffic out of it.
Kevin Dorrell
Luxembourg
06-01-2005 08:27 AM
Thanks Kevin,
this explains this issue.
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