[iproute2] iproute2 question

quoted

I want to reduce the packet loss that happens while routers converge
after a topology change due to a failure, use precalculated backup
table to do rapid failure repair  (repair faster than routing daemon,
fast reroute).
I do static routing on my linux routers.  When  some link  failed,
 I want to  use backup tables to route packets.  Can iproute2 do this?

You could probably kludge something with multiple route tables
and modifying a single 'ip rule'.
Something like:
  http://www.linuxhorizon.ro/iproute2.html

I want to use different routing tables  with different  TOS (or DSCP)
e.g.
iptables -t mangle -A PREROUTING -j TOS --set-tos 0x10
...
then,
ip rule add tos 0x10 table 100
ip rule add tos 0x08 table 200
...
but there are only five TOS values  0x00,0x02,0x04,0x08,0x10. I need
more TOS values.

Does cmd 'ip rule' support DSCP ? (e.g. 'ip rule add dscp 0x11 tables 10')