QOS for Routing updates, LDP, etc

Hi.
We are needing to provide QOS to our voice traffic and we were thinking in configure Precedence 7 to this traffic. The traffic goes through an MPLS Network of 7600 as PE and 12000 as P. Can we configure the routing traffic, LDP and other signaling generated on the routers to use a service class as if the traffic were marked as precedence 6? how can we mark this traffic as precedence 6 changing the default? Is 7 the default value?
Thanks

Hello Pedro,
I did some tests years ago
all routing protocols including OSPF, LDP and BGP uses precedence 6 with the execption of some RSVP-TE messages that are sent out with precedence 0.
Precedence 7 is not used in protocol messages.
However, the recommended value for voip bearer packets is precedence 5 that fits with DSCP EF Expedite Forwarding.
Using precedence 7 is not recommended but you can and you don't need to remark signalling packets.
I would use precedence 5 and I did in the past and also now we use it for voip.
Hope to help
Giuseppe

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