11-17-2008 06:53 AM - edited 03-04-2019 12:22 AM
I am trying to create class and policy maps for a frame-relay router c3845 w 12.4 advipserv.
I've managed to create the access-list, class, and policy map, but when I enter the sub interface and try to apply it, I get the message "CBWFQ not support on subints"
On central router
access-list 198 permit ip 10.11.0.0 0.0.255.255 any
access-list 198 permit ip 10.1.252.0 0.0.0.255 any
access-list 198 permit ip 10.1.60.0 0.0.0.255 any
access-list 198 permit ip 10.10.0.0 0.0.255.255 any
class-map match-any Priority_Traffic_Forest
match access-group 198
policy-map Priority_Traffic_Forest
class Priority_Traffic_Forest
bandwidth percent 50
int Hssi1/0.14
service-policy output Priority_Traffic_Forest
Each subint connects to a different site so I can't apply it to the main interface.
I'm missing something, but not sure what it is. If more info is needed let me know. Thanks in advance.
11-17-2008 08:51 AM
Using the sub interface may not be supported on this release for this platform. I have the same issue on a different platform
11-17-2008 09:35 AM
The issue is, your outbound policy doesn't "know" the amount of bandwidth. On some subinterfaces (don't recall if true for a Hssi frame-relay), issue can be addressed by using a hierarchal policy (with shaper in top level) and/or (perhaps) generic traffic shaper.
e.g.
int Hssi1/0.14
service-policy output Priority_Traffic_Forest
traffic-shape rate ###
or
policy-map somename
class-default
service-policy Priority_Traffic_Forest
shape average ###
int Hssi1/0.14
service-policy output somename
11-17-2008 10:32 AM
Not sure if this will help or clear up anything, but this is the config so far on the interface:
interface Hssi1/0.14 point-to-point
description Forest
bandwidth 1544
ip address 172.168.1.29 255.255.255.252
frame-relay interface-dlci 408
!
Would this change things?
Joseph, how would I come up with the shaper rate or average?
Thanks again.
11-17-2008 11:00 AM
Assuming your HSSI is running at more than T1, but that your far side might be just a T1 or slower, I would at least shape for far side bandwidth (assuming it's less). This so we control congestion rather than some FIFO default especially on far side PVC egress.
The foregoing is even more imporant when trying to insure VoIP performance. Besides trying to get your policy "to take", we may need to shape perhaps a bit slower (e.g. 1400 for T1?) to account for L2 overhead. You want to insure congestion first forms within your policy where you insure VoIP goes first.
[edit]
"Would this change things?"
Don't think so. Believe you need to get a shaper, somehow, into the subinterface config.
11-18-2008 05:12 AM
I think you lost me Joseph, can you point me to a good guide that explains all this? I think some of this is above my head. Thanks for the help.
11-18-2008 05:40 AM
You might start here: http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book.html
You can then look at Cisco's other design guides that reference QoS and then your IOS configuration guide's chapter for your software.
11-18-2008 05:22 AM
Hi,
You will need a nested Policy for this type of config.
a nested policy is configured by creating (Parent & child) policy.
HTH
Mohamed
11-18-2008 12:58 PM
I hope I'm not being greedy here, but could anybody show me a detailed example or a good document so I can learn up on this stuff. Thanks again.
11-18-2008 03:24 PM
In order to apply CBWFQ and LLQ to FR sub-interfaces, you will have to associate the policy-map within a map-class, take a look at the example below:-
class-map match-all voice-signaling
match access-group 103
class-map match-all voice-traffic
match access-group 102
!
policy-map voice-policy
class voice-signaling
bandwidth 8
class voice-traffic
priority 45
class class-default
fair-queue
!
interface Serial0/0
bandwidth 64
no ip address
encapsulation frame-relay
no ip mroute-cache
no fair-queue
frame-relay traffic-shaping
frame-relay ip rtp header-compression
!
interface Serial0/0.1 point-to-point
bandwidth 64
ip address 192.168.10.1 255.255.255.252
frame-relay interface-dlci 400
class VOIPovFR
!
map-class frame-relay VOIPovFR
no frame-relay adaptive-shaping
frame-relay cir 64000
frame-relay bc 640
frame-relay be 0
frame-relay mincir 64000
service-policy output voice-policy
frame-relay fragment 80
access-list 102 permit udp any any range 16384 32767
access-list 103 permit tcp any eq 1720 any
access-list 103 permit tcp any any eq 1720
!
Please take the opportunity review the follow document for further examples:-
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_configuration_example09186a0080094af9.shtml
Hope this helps.
Allan
Pls rate helpful posts.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: