09-19-2014 09:36 AM
If i configured qos in below way in ios-xr:
policy-map test
class class1
shape average 100 mbps
!
class class2
shape average 200 mbps
!
class class3
shape average 50 mbpss
!
class class4
bandwidth remaining percent 90
!
class class-default
bandwidth remaining percent 10
!
end-policy-map
if the interface is 1Gbps and below traffic is on egress interface at below rate:
class1: 200mbps
class2: 200mbps
class3:100mbps
class4: 800mbps
what will be the output? will the class1,2,3 get the defined bandwidth? if found class1,2,3 are getting dropped before the defined limit and class 4 is eating all bandwidth.Is it normal? i know that we can define priority level but if we don not define it, id the defined output is normal?
Solved! Go to Solution.
09-22-2014 08:50 AM
yeah you probably want to set this up a bit differently.
you would want to use the bandwidth command in these shaped classes.
the shape command (setting PIR) operate a bit differently then the classes that have the bandwidth command set (setting cIR).
the CIR of a shape policy is 64k, so after the 64k is served, it moves over to the other classes, gets
the bw remaining assigned and then what is left is divided over the hsaped classes to the max of their PIR.
If you set the bandwidth on all classes you "reserve" that bandwidth on that class when that bw is needed.
may wanna pull cisco live form years 2013 and 2014 (orlando/sanfran) session ID 2904 for more details on QOS you may like.
regards
xander
09-22-2014 08:50 AM
yeah you probably want to set this up a bit differently.
you would want to use the bandwidth command in these shaped classes.
the shape command (setting PIR) operate a bit differently then the classes that have the bandwidth command set (setting cIR).
the CIR of a shape policy is 64k, so after the 64k is served, it moves over to the other classes, gets
the bw remaining assigned and then what is left is divided over the hsaped classes to the max of their PIR.
If you set the bandwidth on all classes you "reserve" that bandwidth on that class when that bw is needed.
may wanna pull cisco live form years 2013 and 2014 (orlando/sanfran) session ID 2904 for more details on QOS you may like.
regards
xander
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