08-13-2008 10:49 AM
Two Sites are connected by MPLS link with 2MB bandwidth.Both sites have cisco 2811 routers and 3750 Switches .ISP says they have enabled QoS with IP Precedence 5 for platinum CoS.I have enabled MQS on both the routers with set precendence vlaue 5 and applied on MPLS outbound direction.And in switches auto qos is enabled and trusted on Video Coference station port and uplink ports .There are some difference on Jitter and Packet loss but still the packet loss increses sometimes and gives poor video output.
Any suggestions on this to improve video quality.
Thanks.
08-13-2008 04:10 PM
by default the precedence 5 not for video!
have u done the right marking for ur vedio traffic ?
and have u given the right bandwith with regard to the marked traffic END TO END
bothe sides and two direction?
the following link not relating to ur case exactly but its about cisco telepresnce QoS
however it will give good information and guid u through the way
http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/tpqosbranch.html
good luck
please, if helpful rate
09-05-2008 09:20 PM
Hello,
Sorry for the late reply.
Do you have any good document which gives steps to mark the video traffic manually in Edge and Core switches ?
Thanks alot.
09-06-2008 02:11 AM
hi Madhu
i think the link i have given to u nice one
and for marking on the edge switch u can either match by source Ip based or u can match the COS,IP precednce or DSCP value of the vedio device u have if it dose marking by default
lets say u matched the traffic by source IP with ACL then class map
for example
lets say the vedio in nework 10.1.1.0/24
do
access-list 100 permit 10.1.1.0 0.0.0.255 any
class-map vedio-class
match access-group 100
policy-map vedio-pilicy
class vedio-class
set ip dscp 32 or precedence cs4 or cos 4
ans also enable qos globaly on the switch
like mls qos
and on the ulink fron edge to core and on the core link as well trust dscp value
in the interface level
like
mls qos trust dscp
on the core u cam make matching to the vedio traffic now by useing the dscp vlaue or ip precedence which either 32 or cs 4 based on the marking mde on the edge wsitch
by the way the policy made above need to be applied in the inbound direction the access port for the veiod source
good luck
if helpful Rate
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