On Aug 3, 2005, at 4:58 PM, Ben Greear wrote: > John T. Kamenik wrote: > >> I have a linux based bridge/router. On one side is a VLAN >> network, and on the other an Ethernet network. The VLAN network >> uses the user_priority field in the VLAN header to perform >> various forms of QoS. The ethernet network does a similar thing >> with the IP ToS bits. Is there an easy way to map the ToS bits >> to user_priority and visa versa? And the solution cannot be "use >> a Cisco" :). >> > > I'm sure the linux iptables code can somehow do the translation > for you...but I don't know the exact details... > Iptables is what I thought about using first. However, iptables does not have an understanding of VLANs. At least not to my knowledge. This means that iptables has no knowledge of the user_priority field and therefore cannot map to or from it. The only solution I could think of was to modify the VLAN driver to allow the mapping between ToS and user_priority. In the same vein as mapping between user_priority and linux priority. Before I attempted it I wanted to know that I had no better options.
