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SMilanic
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Sep 19, 2017

Traffic to a vCMP guest gets marked on vCMP host with CoS 3?

Hi,   Through testing, we have discovered that the traffic to a self-ip of one of the vCMP guest apparently gets marked with Class of Service 3 (CoS) on a vCMP host. For example, if I ping the...
application delivery
BIG-IP
LTM
SMilanic's avatar
SMilanic
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Sep 25, 2017

As it turns out the TMM generated traffic is marked with CoS 3. You can change the CoS value from ver. 11.5.4 HF4. Details here: https://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/related/relnote-supplement-hotfix-bigip-11-5-4.html

 

Component: Local Traffic Manager

 

Symptoms: For TMM generated packets (such as ICMP request), the existing behavior is TMM would use hard code value 3 for the packet priority.

 

Conditions: Packets are generated internally by TMM.

 

Impact: No way to control those packets's priority.

 

Fix: A new db variable tm.egress.pktpriority is added to set packet priority of TMM generated egress packets. Default 3 with range 0-7.