08-03-2010 11:20 AM - edited 03-04-2019 09:17 AM
Guys,
I have a router with 2 serials configure, they are both bonded with a multilink interface. I noticed a command under the "interface multilink 1" command, "ppp multilink queue depth qos 3". What does this command do?
Thanks
BV
Solved! Go to Solution.
08-04-2010 08:10 AM
Hi,
I am not aware of a specific doc for this.
tx_limited = 1(2) << the number in the paranthesis is what I was referring to.
Yes, with qos (service-policy) applied, IOS will autmatically tune it down to 2 packets, per my earlier comment.
-Arun
08-03-2010 11:43 AM
delete
08-03-2010 01:34 PM
Hello,
When you have qos configured, it takes effect only when there is "congestion" on the interface. Congestion is detected when the queue gets filled up. Having a lower queue depth is a good idea when you have RTP (Voice) type of traffic, so that QOS kicks in quickly to service the latency sensitive traffic. By default, when you apply a service-policy to the Multilink, the queue depth is 2 packets.
To take it further, you can do "sh controller | in tx_limit" and you will see this number reflected, when you have qos configured.
The default for FIFO is 8 packets.
HTH.
-Arun
08-04-2010 07:51 AM
Is there any docs on this? I did issue show command you stated on the last reply. This is what I got:
chip_state = 2, ds->tx_limited = 0
chip_state = 3, ds->tx_limited = 0
tx_limited = 1(2), errata19 count1 - 0, count2 - 0
tx_limited = 1(2), errata19 count1 - 0, count2 - 0
You stated "To take it further, you can do "sh controller | in tx_limit" and you will see this number reflected, when you have qos configured", where is the 2 packets reflected? tx_limited = 1(2) or count2.
I did remove " ppp multilink queue depth qos 3" from the multlink interface. The above output is after I removed the depth command.
I do have a service policy with voip class maps on the multilink interface.
Thanks
08-04-2010 08:10 AM
Hi,
I am not aware of a specific doc for this.
tx_limited = 1(2) << the number in the paranthesis is what I was referring to.
Yes, with qos (service-policy) applied, IOS will autmatically tune it down to 2 packets, per my earlier comment.
-Arun
08-04-2010 08:31 AM
Thanks Arun,
This really helped out!!
Bobby
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