Define Bandwidth For 10 Gbps Interface

[Georg Pauwen]

Hello,

you could simply rate limit the input and output on each subinterface. In the example below, each subinterface would get 2GB inbound and outbound:

interface Ethernet5/1.100
rate-limit input 2000000000 375000000 750000000 conform-action transmit exceed-action drop
rate-limit output 2000000000 375000000 750000000 conform-action transmit exceed-action drop

interface Ethernet5/1.101
rate-limit input 2000000000 375000000 750000000 conform-action transmit exceed-action drop
rate-limit output 2000000000 375000000 750000000 conform-action transmit exceed-action drop

interface Ethernet5/1.102
rate-limit input 2000000000 375000000 750000000 conform-action transmit exceed-action drop
rate-limit output 2000000000 375000000 750000000 conform-action transmit exceed-action drop

interface Ethernet5/1.103
rate-limit input 2000000000 375000000 750000000 conform-action transmit exceed-action drop
rate-limit output 2000000000 375000000 750000000 conform-action transmit exceed-action drop

interface Ethernet5/1.104
rate-limit input 2000000000 375000000 750000000 conform-action transmit exceed-action drop
rate-limit output 2000000000 375000000 750000000 conform-action transmit exceed-action drop

[Georg Pauwen · Accepted solution]

Two other options would be policing and generic traffic shaping:

Policing

policy-map LIMIT_BW
 class class-default
  police rate 200000000

interface Ethernet5/1.100
 service-policy input LIMIT_BW 
 service-policy output LIMIT_BW

interface Ethernet5/1.101
 service-policy input LIMIT_BW
 service-policy output LIMIT_BW

interface Ethernet5/1.102
 service-policy input LIMIT_BW
 service-policy output LIMIT_BW

interface Ethernet5/1.103
 service-policy input LIMIT_BW
 service-policy output LIMIT_BW

interface Ethernet5/1.104
 service-policy input LIMIT_BW
 service-policy output LIMIT_BW

Generic Traffic Shaping

interface Ethernet5/1.100
 traffic-shape rate 200000000 3750000 7500000

interface Ethernet5/1.101
 traffic-shape rate 200000000 3750000 7500000

interface Ethernet5/1.102
 traffic-shape rate 200000000 3750000 7500000

interface Ethernet5/1.103
 traffic-shape rate 200000000 3750000 7500000

interface Ethernet5/1.104
 traffic-shape rate 200000000 3750000 7500000

[zekebashi]

Hi Gpauwen, 

Thank you for this great material. In relation to the Policing approach, what's the action that will be taken if the sub-interfaces exceeded the BW limit specified? 

Best, ~zK 

[Georg Pauwen · Accepted solution]

Hello,

policing is rather harsh, meaning that traffic that exceeds the rate will be dropped. Depending on your platform, there might be options to specify exceed actions...

[zekebashi]

Thanks for this helpful info. 

Much appreciated! 

Best,   ~sK