05-16-2018 05:24 AM - edited 03-05-2019 10:27 AM
I'm looking to Qos an 800Mb Layer 2 link, to our DR site, from a 6807-XL with VS-SUP2T-10G Supervisor.
Dedupe of our backup traffic is killing this link. I'm not 100% sure on how to go about this, I thought this could do the trick but I'm not really 100% up on QoS, so any feedback would be very much appreciated:
ip access-list extended NETBACKUP_QOS
permit ip any host x.x.x.x (dest dedupe appliance)
class-map CM_NETBACKUP match-any
match access-group name NETBACKUP_QOS
policy-map PM_NETBACKUP
class CM_NETBACKUP
bandwidth percent 60
class class-default
fair-queue
interface x/x/x
service-policy output PM_NETBACKUP
I did also think that shaping the link to 800Mb would be a good idea as the circuit is 800Mb and the Switch interface 1Gb.
policy-map PM_NETBACKUP
class CM_NETBACKUP
bandwidth percent 60
class class-default
fair-queue
policy-map PM_PARENT_SHAPE
class class-default
shape average 800000000
service-policy PM_NETBACKUP
interface x/x/x
service-policy output PM_PARENT_SHAPE
Are there any advantages/disadvantages to doing one over the other?
At some point this year there may also be voice traffic traversing this link so I also thought, while I'm at it, I could get the link ready for voice traffic:
class-map CM_VOICE match-any
match dscp ef
class-map CM_VOICE_SIG match-any
match dscp af31
policy-map PM_QoS
class CM_VOICE
priority percent 10
class CM_VOICE_SIG
priority percent 5
class CM_NETBACKUP
bandwidth percent 60
class class-default
fair-queue
interface x/x/x
service-policy output PM_QoS
or with shaping?
policy-map PM_QoS
class CM_VOICE
priority percent 10
class CM_VOICE_SIG
priority percent 5
class CM_NETBACKUP
bandwidth percent 60
class class-default
fair-queue
policy-map PM_PARENT_SHAPE
class class-default
shape average 800000000
service-policy PM_QoS
interface x/x/x
service-policy output PM_PARENT_SHAPE
Am I barking up the wrong tree with these configurations?
Thanks,
Jim.
05-16-2018 11:22 AM
05-17-2018 04:05 AM
Thanks for taking the time to respond to my query.
I tried configuring the shaping policy on our 6807and it took the commands, so I'm assuming it will shape, if not then I'll ask our provider about upgrading the link to 1Gb as we could do with the extra capacity anyway.
Taking on board your advice, I will configure this:
class-map CM_VOICE match-any
match dscp ef
match dscp af31
policy-map PM_QoS
class CM_VOICE
priority percent 15
class CM_NETBACKUP
bandwidth percent 1
class class-default
bandwidth percent 25
fair-queue
05-24-2018 03:54 AM
The more I look at this the more I'm unsure about the bandwidth I've assigned to class-default.
Should I be assigning the remainder to it?
policy-map PM_QoS
class CM_VOICE
priority percent 15
class CM_NETBACKUP
bandwidth percent 1
class class-default
bandwidth percent 84 (instead of 15?)
fair-queue
Again, thanks!
05-24-2018 10:13 AM
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