From: Robin Johnson (Rob.Johnson@dxi.net)
Date: Tue Jun 15 2004 - 14:26:17 GMT-3
Hello,
Im trying to run llq qos outbound across a serial 2Mb circuit and was trying
to work out in what order the router actually processes the policy map
I understand the router determines if the packets destination is reachable
and that it works out the next hop toward the destination and what interface
to send it but as the service policy is applied to the interface itself does
the router re-write the mac and forward it to this interface and then look
at the policy map or does it somehow do it in software before or in between
the routing process?
I guess what im trying to work out is how does the packet that enters the
router know anything about the service policy that is applied to the exiting
interface before actually exiting the router? Is it purely doing a lookup to
an acl whilst in the queue of the exiting interface and then prioritised
ahead of other things in the queue or is it using some sort of scheduler
before hand
Any pointers or links in the right direction would be much appreciated
Example
interface Serial3/0
bandwidth 2048000
ip address x.x.x.x x.x.x.x.x
service-policy output TESTING
class-map match-all SMTP_Class
match access-group 122
class-map match-any VOIP-signalling
match access-group 126
class-map match-any Voip_Media
match access-group 125
class-map match-any Critical-systems
match access-group 121
match access-group 124
match access-group 127
match access-group 128
match access-group 129
!
!
policy-map TESTING
class Voip_Media
priority percent 33
class Voip_Sig
bandwidth percent 5
class Bus_Systems1
bandwidth percent 7
class class-default
fair-queue 4096
This archive was generated by hypermail 2.1.4 : Sat Jul 03 2004 - 19:40:41 GMT-3