RSP3C(ASR902, ASR903, ASR907) : Packet Drop 発生時に取得するログ

Ryota Takao · ‎2018-10-12

RSP3C(ASR902, ASR903, ASR907) にて Packet Drop 発生時に取得するログなどを記載しています。

ログ取得前に事前に設定頂きたいコマンド

ログを取得する場合は以下の Link に記載されている設定を行ったうえでログをご取得ください。

show コマンド

RSP3C(ASR902, ASR903, ASR907) にて Packet Drop 発生時には事象発生中に以下のコマンドを複数回ご取得ください。

IOSd 側

show arp 
show arp vrf <vrf name> ＊VRFを使用しているときのみ取得してください。
show processes cpu sorted
show stacks
show stacks <PID>
show buffers
show interfaces
show interfaces accounting
show interfaces stats
show interfaces switching
show controllers
show policy-map interface <Interface> ＊policy-map を使用している場合はご取得ください。
show ip traffic
show ip traffic interface <Interface>
show ip spd
show ip route vrf *
show ip cef internal
show ipv6 neighbors
show ipv6 neighbors vrf <vrf name> ＊VRFを使用しているときのみ取得してください。
show ipv6 traffic
show ipv6 traffic interface <Interface>
show ipv6 spd
show ipv6 route vrf *
show ipv6 cef internal
show adjacency internal
show logging
show tech-support
＊show tech-support は多少CPUに負荷がかかります。

Linux 側

show platform hardware pp active mactable
show platform hardware pp active interface statistics
show platform hardware pp active tcam utilization ucastv4 detail 0
show platform hardware pp active tcam utilization ucastv4 detail 1
show platform hardware pp active asic statistics nz
show platform hardware pp active classification statistics
show platform hardware pp active feature cef statistics
show platform hardware pp active feature cef database adjacency
show platform hardware pp active feature cef database routing-table
show platform hardware pp active feature cef database routing-table ipv4 0
show platform hardware pp active feature cef database routing-table ipv6 0
show platform hardware pp active infrastructure pi nft statistics
show platform hardware pp active infrastructure pi pfd interrupts 0
show platform hardware pp active infrastructure pi pfd interrupts 1
show platform hardware pp active infrastructure pi pfd nif_stats
show platform hardware pp active infrastructure pi pfd rx statistics 0 0
show platform hardware pp active infrastructure pi pfd rx statistics 0 1
show platform hardware pp active infrastructure pi pfd rx statistics 0 2
show platform hardware pp active infrastructure pi pfd rx statistics 1 0
show platform hardware pp active infrastructure pi pfd rx statistics 1 1
show platform hardware pp active infrastructure pi pfd rx statistics 1 2
show platform hardware pp active infrastructure pi pfd tx statistics 0
show platform hardware pp active infrastructure pi pfd tx statistics 1
show platform hardware pp active infrastructure pi pfd statistics summary
show platform software infrastructure punt
show platform software infrastructure punt statistics
show platform software infrastructure inject
show platform software infrastructure lsmpi
show platform software infrastructure lsmpi punt
show platform software infrastructure lsmpi inject
show platform software infrastructure lsmpi bufusage
show platform software infrastructure lsmpi driver
show platform software infrastructure detailed thread fastpath
show platform software infrastructure detailed thread interrupt
show platform software infrastructure detailed packet
show platform software adjacency RP active
show platform software adjacency FP active
show platform software ip RP active cef
show platform software ip FP active cef
show platform software ip RP active cef detail
show platform software ip FP active cef detail
show platform software status control-processor brief
show platform software process slot RP active monitor cycles 1
show platform software process list RP active
show platform software process list RP active process-id <Linux PID>
show platform hardware pp active bshell "1: diag counters g" 
show platform hardware pp active bshell "0: diag counters g" 
show platform hardware pp active bshell "diag cosq voq con=1" 
show platform hardware pp active feature qos policer cpu all 0

<PID> の部分には show processes cpu sorted で CPU 使用率が上昇している Process の PID を確認して、PID を入力してください。

Router#show processes cpu sorted
CPU utilization for five seconds: 81%/0%; one minute: 3%; five minutes: 1%
PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
88       12660       71555        176 80.31% 1.62% 0.33%   0 IP Input
101        3880        1508       2572 0.39% 0.07% 0.01%   0 Exec

この例であれば、IP Input が上昇していて PID が 88 なので show stacks 88 と入力してください。

<Interface> には関連する interface を入力してください。不明であれば全ての Interface を入力頂ければと思います。

show ipv6 ... のコマンドは IPv6 使用時のみご取得ください。

<Linux PID> には show platform software process slot <slot> monitor cycles 1 で何か問題のあるプロセスがあればそのプロセスの PID を入力してください。

例えば以下の例であれば、hman の CPU 使用率が 83.7% になっているので、hman の PID 32767 を入力してください。

Router#show platform software process slot R0 monitor cycles 1
top - 08:53:22 up 1 day, 8:52, 0 users, load average: 1.07, 1.11, 1.08
Tasks: 148 total,   3 running, 145 sleeping,   0 stopped,   0 zombie
Cpu(s): 5.3%us, 2.7%sy, 0.0%ni, 91.8%id, 0.0%wa, 0.0%hi, 0.1%si, 0.0%st
Mem:   3874476k total, 1748840k used, 2125636k free,   132672k buffers
Swap:        0k total,        0k used,        0k free, 1000420k cached

PID USER      PR NI VIRT RES SHR S %CPU %MEM    TIME+ COMMAND
32767 root      20   0 1963m 518m 191m R 83.7 13.7 93:27.03 hman
1225 root      20   0 21148 7356 4936 S 13.6 0.2 27:43.41 linux_iosd-imag
18352 root      20   0 2652 1168 892 R 3.9 0.0   0:00.02 top
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