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QoS Throttling?

ryders1
Level 1
Level 1

I have a location with a 50Mbps MPLS Circuit. I have been investigating reports of slowness and I have found on their WAN interface a bandwidth of 5000. This interface also has a QoS policy set on it. The QoS policy has a cir 10000000 (bps). I believe this is effectively throttling the speed to 10Mbps and the interface using the policy is calculating QoS using 5Mbps as max available bandwidth.  I don't have much experience with these policies so I would appreciate any input from others who do.

Router is ISR4321 on version 17.06.05

-----------------------------

interface GigabitEthernet0/0/1
bandwidth 5000
xxxxxxxxx
service-policy output Policy1

-------------------------

Policy Map Policy1
Class class-default
Average Rate Traffic Shaping
cir 10000000 (bps)
service-policy

1 Accepted Solution

Accepted Solutions

Joseph W. Doherty
Hall of Fame
Hall of Fame

The shaper's CIR should be for 50 Mbps, or about 15% less to allow for L2 overhead (don't know whether that shaper counts L2 overhead).

Possibly the bandwidth statement isn't impactful for bandwidth throttling.

View solution in original post

1 Reply 1

Joseph W. Doherty
Hall of Fame
Hall of Fame

The shaper's CIR should be for 50 Mbps, or about 15% less to allow for L2 overhead (don't know whether that shaper counts L2 overhead).

Possibly the bandwidth statement isn't impactful for bandwidth throttling.

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