C9000 Packet Drops
Terms
S1 — Silicon One
- Made by Cisco
- Single Architecture forwarding ASIC
PHY — Physical
- Converts external signals on the wire into signals inside the transceiver.
FE — Forwarding Engine
IFC — Ingress Forwarding Controller
EFC — Egress Forwarding Controller
Forwarding Types
- Single FE, pg34
- Intra-FE, pg36
- Intra-FE different stack members, pg43
- Recirculation within FE (VXLAN, SDA, EVN)
- IOSd control plane forwarding, pg 70
- Mgmt Port, pg. 83
- App Hosting, pg. 84
Forwarding Drops
EPDA - Enhanced packet drop analyzer
S1 ASIC platforms.
EPDA instructions are inside BRKARC-3090.
!
! identify traffic by delta
! run this a few times
!
!
show platform hardware fed active fwd-asic traps npu-traps asic all
!
! Pick the NPU trap you are interested in
!
debug platform software fed active drop-capture set-trap npu-traps l3 l3-null-adj
!
! Start it
!
debug platform software fed active drop-capture start
!
! Stop it
!
debug platform software fed active drop-capture stop
!
! Display Packets
!
show platform software fed active drop packet-capture brief
!
! Clear the trap when done
!
debug platform software fed active drop-capture clear-trap npu-traps l3 l3-null-adj
ASIC drop counters (NPU/TM/IFG)
!
! See all drops, but doesn't really provide context
!
show platform hardware fed active fwd-asic drops asic
show platform hardware fed active fwd-asic drops ifg
show platform hardware fed active fwd-asic drops npu
show platform hardware fed active fwd-asic drops tm
ASIC ALL Counters
!
! A last resort, just raw data
!
show platform hardware fed active fwd-asic counters 0 counters_all
References
Cisco Live - C9000 - Packet Journey - Ivan Shirshin & Nathan Pan - BRKARC-3090
Cisco Live - C9000 - Packet Journey - Jaroslaw Gawron & Ivan Shirshin - BRKARC-2100
Cisco Live - C9000 - Troubleshooting - Michel Peters - BRKTRS-3090