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Overview Cisco 1721

Could you indicate me more information about performance of Cisco 1721 with two BRI´s interfaces with command 'dialer load-threshold 153 either', for example:

-Which parameters are used by the router for calculate the threshold???

-In moment of raise a new B channel, what happen it with buffers?

VIP Purple

Re: Overview Cisco 1721


the load threshold is based on the transmit and/or receive load of the interface. You can see the load with the command:

1721#show interface bri0

BRI0 is up, line protocol is up (spoofing)

Hardware is BRI

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,


reliability 255/255, txload 1/255, rxload 1/255


Encapsulation PPP, loopback not set

Last input 00:00:02, output never, output hang never

Last clearing of "show interface" counters 1d19h

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/1/16 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 48 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

15685 packets input, 62743 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

15685 packets output, 62743 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

3 carrier transitions

The load is based on a scale from 1 to 255, where 255 would be 100%. A load threshold of 153 would be 60%.

Once the second B-channel comes up, twice the line capacity is available, and the buffers will be filled up less, accordingly...not sure if that is what you are asking.



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