[c-nsp] TCAM Errors on SIP-401 Engine 5 Linecard for E1 SPA.

[Ahmad, Sazli Bin]

Good Day,

 

We have a problem with SIP-401 Engine 5 Linecard getting TCAM errors
when Qos is applied on an E1 SPA Card.  

 

This problem will happen when outgoing service-policy is applied on the
Serial Interface and it will generate TCAM errors and eventually will
crash the Linecard.

 

Below are the sample of the Qos configuration.

 

class-map match-all cpe-mgmt

  match access-group 2052

 

class-map match-all TrustPrecedence-cos4

  match ip precedence 4 

 

class-map match-all TrustPrecedence-cos2

  match ip precedence 2 

 

class-map match-any SIP-401-TESTING

  match access-group 2190

 

class-map match-all SIP-401-cos1

  match any 

 

class-map match-all SIP-401-cos3

  match  dscp 34 

 

policy-map SIP-401-child-out

 description Inbound Classification for SIP-401 Testing

  class TrustPrecedence-cos4

    priority

   police 1000000 200000 400000 conform-action transmit  exceed-action
drop 

  class SIP-401-TESTING

    bandwidth remaining percent 60

    random-detect

    random-detect precedence 3 3200 packets 4096 packets 1

   police 1000000 200000 400000 conform-action transmit  exceed-action
drop 

  class TrustPrecedence-cos2

    bandwidth remaining percent 25

    random-detect

    random-detect precedence 2 2000 packets 3200 packets 1

   police 1000000 200000 400000 conform-action transmit  exceed-action
drop 

  class SIP-401-cos3

    bandwidth remaining percent 10

    random-detect

    random-detect precedence 1 1000 packets 2000 packets 1

   police 1000000 200000 400000 conform-action transmit  exceed-action
drop 

  class SIP-401-cos1

    bandwidth remaining percent 4

    random-detect

    random-detect precedence 0 500 packets 1000 packets 1

   police 1000000 200000 400000 conform-action transmit  exceed-action
drop 

  class cpe-mgmt

    bandwidth remaining percent 1

    random-detect

    random-detect precedence 0 500 packets 1000 packets 1

   police 16000 3200 6400 conform-action transmit  exceed-action drop

  class class-default

    bandwidth remaining percent 1

    random-detect

    random-detect precedence 0 500 packets 1000 packets 1

   police 16000 3200 6400 conform-action transmit  exceed-action drop

 

 

policy-map SIP-401-out

 description Parent Outbound Policy for SIP-401 Testing

  class class-default

    shape average 1000000 200000 400000

   service-policy SIP-401-child-out

 

Can I have any advise on what could be the cause of the problem?  If the
problem is due to the Qos setting, what will be the recommended Qos
configuration in order to avoid any TCAM errors and Linecard crash?
Will there be another way of configuring the Qos in order for us to
achieve the same output as above? 

 

Regards

Sazli Ahmad