fifo queue

Answered Question
Oct 5th, 2008

Hi,

The FE is using fifo queuing. Does it have "hold-queue" concept?

I config the FE 1 with below and it allow me to config. can it work and function properly?

! R1

interface FastEthernet1

hold-queue 3036 in

hold-queue 3036 out

rdgs

I have this problem too.
0 votes
Correct Answer by satish_zanjurne about 8 years 1 month ago

1.It is correct.

2.It is correct.

3.No , you can not configure

HTH..rate if helpful..

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satish_zanjurne Sun, 10/05/2008 - 21:40

Hi,

1.Hold-queue concept is used to limit the size of the IP output queue on an interface.

2.You can configure it on interfaces , even if you are not using any QoS feature.

3.Use the hold-queue command in interface configuration mode. To restore the default values, use the no form of this command

4.For most interfaces, queue length should not exceed 100

5.The default input hold-queue limit is 75 packets.

The default output hold-queue limit is 40 packets.

For asynchronous interfaces the default is 10 packets.

These limits prevent a malfunctioning interface from consuming an excessive amount of memory. There is no fixed upper limit to a queue size.

6.Use show interface to see the input & output queues counters.

HTH..rate if helpful..

anitachoi3 Sun, 10/05/2008 - 22:26

Hi,

If I enable more in/out hold-queue. What is the adv and disadv?

furthermore, fifo is one queue only. All 75 hold-queue are the same priority. It should be the same result if I config it to 3036 (hold-queue). the last setting (3036) should have more buffer for incoming packet before the packet dispatch to fifo queue. Is it correct?

rdgs

satish_zanjurne Sun, 10/05/2008 - 23:11

Hi,

It is not 75 queues.

It is 75 packets in the input queue.

Also as mentioned , it is recommended that limit should not go beyond 100.

3036 value is too big , make it 100.If you set it too big, definitely router will start giving problems.

HTH..rate if helpful...

anitachoi3 Mon, 10/06/2008 - 05:35

Hi,

Sorry that I have some confuse.

1. If I config "hold-queue 3036 in", It means that there are 3036 packets in input hold-queue. Is it correct?

2. The number of hold-queue must be "1". it means that there is one input hold-queue and one output hold-queue. Is it correct?

3. I cannot config number of hold-queue, can I?

rdgs

Correct Answer
satish_zanjurne Mon, 10/06/2008 - 10:38

1.It is correct.

2.It is correct.

3.No , you can not configure

HTH..rate if helpful..

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