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04-25-2019 01:12 PM
I have a vpn tunnel & clients on the internal network need to initiate connections to a server on the other side (egress traffic). The max upload speed of the broadband circuit is 5 megs which is always at max utilization. Is there a way to mark traffic that is only best effort DSCP and change the value to EF 46 when crosses the Egress interface? I set up a QoS profile using EF for all traffic to one destination but when I look at the captures the DSCP is still best effort/default. I am trying to get this traffic to have the highest priority when going to the Egress interface.
04-26-2019 10:20 AM
> Do these options actually change the DSCP value from best effort to EF? If I look in the header I should see EF afterwards without needing to change the DSCP on the internal client app machines is that correct?
Yep! It modifies it prior to egress:
https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClKrCAK
04-25-2019 03:43 PM
There are a couple options:
1. If you want to set it on a specific type of traffic regardless of security rules, you can add a QoS policy for it to add the DSCP/ToS values.
Policies > QoS > Add > DSCP/ToS tab > Add.
Name: your choice
Type: EF
If you don't want just EF, you can select others or even write a custom value (in binary).
2. If you want to base it on specific security policies instead, you can open your security policy for this traffic and add a QoS marking:
Policies > Security > your_rule > Actions tab > Other Settings section > QoS Marking. Chose IP DSCP and a new drop-down appears.
EF should be there, and should be 101110 in binary.
04-25-2019 06:58 PM
04-26-2019 10:20 AM
> Do these options actually change the DSCP value from best effort to EF? If I look in the header I should see EF afterwards without needing to change the DSCP on the internal client app machines is that correct?
Yep! It modifies it prior to egress:
https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClKrCAK
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