组网及说明
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告警信息
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问题描述
设备: S6520X-HI
问题:作为adcampus中的leaf,内存高达93%,随后业务受损,现场收集诊断和日志后,紧急重启设备后业务恢复了.现场还有一台,89%的.
============================================================
===============display memory===============
Memory statistics are measured in KB:
Slot 1:
Total Used Free Shared Buffers Cached FreeRatio
Mem: 2036132 1941016 95116 0 0 292480 5.8%
-/+ Buffers/Cache: 1648536 387596
Swap: 0 0 0
LowMem: 1520036 1425788 94248 -- -- -- 6.2%
HighMem: 516096 515228 868 -- -- -- 0.2%
%@3911738%May 10 16:30:02:072 2023 TSG-2F-leaf-172.18.108.51 DIAG/1/MEM_EXCEED_THRESHOLD: Memory early-warning threshold has been exceeded.
Memory statistics are measured in KB:
Total Free FreeRatio
Mem: 2036132 112292 5%
LowMem: 1520036 111592 --
HighMem: 516096 868 --
Free-memory thresholds:
Minor: 5%
Severe: 3%
Critical: 2%
Normal: 6%
Early-warning: 10%
Secure: 15%
Process info(KB):
JID Used Name
550 663556 portsecd
616 289144 bgpd
305 187280 xmlcfgd
209 67312 ifmgr
3422961 51548 comsh
Slub info(KB):
Used Name
286718 kmalloc-8388560
102389 IPCIM_ENTRY_IPV6_cachep
65535 kmalloc-67108816
51060 kmalloc-2048
24575 kmalloc-4194256
%@3942083%May 12 11:29:01:745 2023 TSG-2F-leaf-172.18.108.51 DIAG/1/MEM_EXCEED_THRESHOLD: Memory critical threshold has been exceeded.
Memory statistics are measured in KB:
Total Free FreeRatio
Mem: 2036132 49844 2%
LowMem: 1520036 48976 --
HighMem: 516096 868 --
Free-memory thresholds:
Minor: 5%
Severe: 3%
Critical: 2%
Normal: 6%
Early-warning: 10%
Secure: 15%
Process info(KB):
JID Used Name
550 667968 portsecd
616 282176 bgpd
305 187280 xmlcfgd
209 67312 ifmgr
540 51532 routed
Slub info(KB):
Used Name
286718 kmalloc-8388560
103780 IPCIM_ENTRY_IPV6_cachep
65535 kmalloc-67108816
51060 kmalloc-2048
28671 kmalloc-4194256
过程分析
经分析代码确认是平台的一个已知问题，目前有F6638Pxx版本可以解决:vlan下配置nd snooping和ipsg，两个端口打入相同NS模拟用户频繁迁移，一段时间后停止流量，删除nd snooping后部分ipv6
IPSG表项残留
在出现内存比较低时，先尝试用下面的命令恢复下
[H3C-probe]process restart name ipcimd
Manually restarting a process might severely affect device operation. Perform this operation only under the guidance of H3C engineers. Continue? [Y/N]:y
Restarting process ipcimd[300] on slot 4...
Succeeded.
[H3C-probe]
解决方法
升级F6638Pxx版本或者使用[probe]process restart name ipcimd手工释放规避.