DSCP Markings on Control Protocols

[jungeunhur]

                   Hello,

I would like to understand default DSCP markings (if  any) by the router on the following control protocols.  If anyone knows please advise.  Thank you.

HW - 760xx

SW - IOS 12.x

OSPF

BGP

LDP

Link Keepalives

[siddhartham]

I believe the default DSCP markings are set ZERO- no marking by default