How to Increase Latency p2p

[nazim@circlenetworkbd.net]

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.?

[Giuseppe Larosa]

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

[nazim@circlenetworkbd.net]

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

[Giuseppe Larosa]

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