Cisco Support Community
Community Member

Traffic Marking Query


I have the requirement to mark traffic sourced from 4 IP addresses destination ANY as AF1 before it is transmitted acorss the MPLS network - this is at the host site on the network.  Easily done using an ACL on the host router

My query is around the reverse path, there are a large number of sites that will use these servers - assuming the remote site LAN's are all configured accordingly to trust and MPLS is all ok - is the ToS value going to be retained on the reverse path, or am I looking at it putting access-lists on all the remote sites using 4 IP's as a destination

Have had mixed replies - some saying it will retain, some say it won't, some think application dependant


Everyone's tags (2)
Super Bronze

Traffic Marking Query


The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.


It's application dependent.  I.e. you may (likely) need marking ACLs on the far side too.

CreatePlease to create content