tunnel mpls traffic-eng affinity

From: DENNIS UBOM (cciedreamz@gmail.com)
Date: Tue Sep 30 2008 - 09:18:34 ART


Hi experts,
                can somebody explain to me the Affinity value bit and mask
and how to calculate one?
i understand affinity is use for link coloring but havent been able
understand or find infor how the configured bit/mask determined.

tryin to test on dynamips and no luck

interface Tunnel88
 ip unnumbered Loopback0
 tunnel destination 10.10.10.11
 tunnel mode mpls traffic-eng
 tunnel mpls traffic-eng autoroute announce
 tunnel mpls traffic-eng priority 0 0
 tunnel mpls traffic-eng bandwidth 1500
 tunnel mpls traffic-eng affinity 0x81 mask 0xFFFF
 tunnel mpls traffic-eng path-option 1 dynamic
end
R8#sh run int f0/0.88
Building configuration...
Current configuration : 260 bytes
!
interface FastEthernet0/0.88
 ip address 10.10.88.8 255.255.255.0
 ip router isis
 ip mpls traffic-eng tunnels
 mpls traffic-eng attribute-flags 0x81
 mpls ip
 isis circuit-type level-1
 ip rsvp bandwidth 20000
end

i added command " mpls traffic-eng attribute-flags 0x81" on the link to
tailend but but tunnel is still down

my question is
what are this affinity bit/mask and how does it work? or calculate one. pls
check bold
config t
R8(config)#INT TUN88
R8(config-if)#tunnel mpls traffic-eng affinity ?
  <0x0-0xFFFFFFFF> *affinity value*
R8(config-if)#tunnel mpls traffic-eng affinity 0x81 ?
* mask mask on desired link attributes*

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