ASR1k CPU Protection

SPD

ARP -> Input queue
BGP -> Headroom
HSRP -> Extended Headroom
OSPF -> Extended Headroom
IP Pre0 -> Input queue
IP Pre6 -> Headroom

Implementation of CoPP in ASR1000

1. Internal interfaces in ASR1000:

   • Punt/inject interface: traffic between RP and FP

   • Recycle interface: control traffic handled by FP directly

2. Implementation relies heavily on QoS feature

   • CoPP is implemented as QoS on the punt/inject interface and recycle interface.

3. GPP is an internal ASR1k feature:

   • Designed to protect RP by enforcing a default policer on punt traffic (150K pps and a burst of 2288 packets with average packet size of 1KB).

   • Always on and not configurable.

   • Enforced after CoPP has been applied on ingress traffic.

ASR1k CPU protection order

1. CoPP works before PCPP.

2. Per-cause Punt Policers work by default (sh pl software punt-policer)

3. Global Punt Policer

Cisco Internal: you can check EDCS-703796 and EDCS-904674 for more details.

Related CLI

• show int switching

• show ip spd

• show platform hardware qfp active statistics drop

• show platform software infrastructure punt [statistics]

Following commands show CoPP programmed in HW:

• show platform hardware qfp active feature qos all output all

• show platform hardware qfp active feature qos all input all

• show platform hardware qfp active feature qos all input interface internal0/0/rp:0

• show platform hardware qfp active feature qos all input interface internal0/0/rp:1

• show platform hardware qfp active feature qos all input interface internal0/0/recycle:0

• show platform hardware qfp active feature qos all output interface internal0/0/rp:0

• show platform hardware qfp active feature qos all output interface internal0/0/rp:1

• show platform hardware qfp active feature qos all output interface internal0/0/recycle:0

In new SW:

• show platform hardware pp active infrastructure pi npd rx policer

• show platform hardware pp active feature qos policer cpu stats 1

• show platform hardware pp active feature qos policer cpu stats 0

• show platform hardware pp active feature qos policer cpu 3 0

Links

1.Punt Policing and Monitoring