04-21-2021 02:02 PM
Dear,
Thanks in advance.
I want to increase the latency of a sub-interface p2p IP and other services running through this VLAN.
Example:
Sub interface VLAN ID: 100 ( Te0/1/0/1.100)
Current Usage: 100Mb
Current latency 1ms at p2p and other services 20/30/...
Now I apply policy-map this sub-interface into 50Mb.
Now my requirement is when this sub-interface usage full then increases latency on p2p (1ms+100ms=101ms) and other services ( 20/30+100ms=120/130ms).
IS IT POSSIBLE TO DO CISCO ASR 9006 IOS XR.?
04-21-2021 11:54 PM
Hello Nazim,
no you cannot increase laterncy of a fixed value with QoS
Using shaping at 50 Mbps and allocating software based queues for each traffic class, your traffic will be delayed = stored in SW based queues so that it can be sent respecting the shaper rate , but the amount of delay is variable and depends on how traffic arrives on the interface.
The objective of shaping is to respect the shaping rate and not to add a fixed delay to each packet.
Hope to help
Giuseppe
04-22-2021 03:58 AM
Dear Giuseppe,
Thanks for your reply.
is there any other command/way to increase latency without policy-map? no need for fixed latency. But increase some latency.
Thanks
Thanks
04-22-2021 05:08 AM
Hello Nazim,
no there is no way to add a delay even variable to packets . The main reason is that the router tries to forward the packets as soon as possible,
In the past I have used a WAN emulator to emulate the delay of a satellite link.
It was a software installed on a PC with two NICs and I could add 500 msec delay to each packet entering NIC1 and exiting on NIC2.
The company name was SHUNRA that in 2014 had been acquired by HP. I was not able to understand if their product is still available or not.
Look for "WAN emulator software"
Hope to help
Giuseppe
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