Ingress and Egress policing on 6500

Unanswered Question
Jun 15th, 2008
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Hi,


I have interent customer with diff BW ( 1M, 2M, 3M) and want to policy ingress and egress both either on interface or on vlan.


I read that sup1/Sup2 doesnt support egress policy.


What is best way to have ingress and egress policy for Sup1/Sup2 based 6500 runnign with Native IOS ?


Please suggest.


Thanks,

Chintan.

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chintan-shah Wed, 06/18/2008 - 23:47
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Thanks for the infon on FlexWAN card. But I already have GE LAN card and Internet customers are running with Qos policy configured using "rate-limit input" & "rate-limit output". Do I have any other option here for Sup1A/Sup2 with PFC/PFC2 ?


I also have Sup720/PFC3 based MLS and there I'm planning to have as below:


policy-map -Policing


class class-default


police



: this is the bandwidth (Bps) purchased by the customer.



Proposed one for L3 Interface



interface GigabitEthernet


ip address x.x.x.x y.y.y.y


service-policy input -Policing


service-policy output -Policing



Proposed one for L2 interface (L3 VLAN) for each customer



Interface GigabitEthernet


switchport


switchport mode trunk


switchport trunk allowed vlan A,B,C


mls qos vlan-based



Interface vlan A/B/C


ip address x.x.x.x y.y.y.y


service-policy input -Policing


service-policy output -Policing


Do you see any issue/known issue with this ?


Thanks for your help.


Regards,

Chintan




Edison Ortiz Thu, 06/19/2008 - 04:49
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If you aren't concerned about excess traffic being dropped, then policing QoS mechanism will meet your needs.


Keep in mind, certain type of traffic behaves differently when dropped (i.e. TCP). It tends to retransmit the packet hence causing more congestion in the network. You can alleviate this behavior by configuring WRED.


For more information on PFC QoS, please refer to the documentation:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/qos.html#wp1547950


HTH,


__


Edison.


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