URL: https://linuxfr.org/forums/linux-general/posts/probl%C3%A8me-r%C3%A9seau-neighbour-table-overflow Title: Problème réseau : Neighbour table overflow Authors: asbepo Date: 2011年11月17日T11:07:32+01:00 Tags: arp Score: -1 Bonjour, j'ai un problème de perte de connexion réseau sur un serveur. Le serveur 10.100.2.252 ne parvient pas à pinger le serveur 10.170.1.8. Lorsque je ping le serveur 10.100.2.252 depuis 10.170.1.8, la connexion est rétablie et le ping marche dans les deux sens. De nombreuses lignes "Neighbour table overflow" sont présentes dans /var/log/messages J'ai modifié les valeurs de : /proc/sys/net/ipv4/neigh/default/gc_thresh1 (1024) /proc/sys/net/ipv4/neigh/default/gc_thresh2 (2048) /proc/sys/net/ipv4/neigh/default/gc_thresh3 (4096) mais le problème persiste. Je pense que le problème vient dans la configuration réseau du 10.100.2.252 La configuration est la suivante sur ce serveur : route -n ```text Table de routage IP du noyau Destination Passerelle Genmask Indic Metric Ref Use Iface 193.253.160.3 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 193.16.159.180 10.100.2.254 255.255.255.255 UGH 0 0 0 eth0 10.222.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 5.5.100.0 10.100.2.254 255.255.255.0 UG 0 0 0 eth0 192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0.2 193.108.167.0 10.100.2.254 255.255.255.0 UG 0 0 0 eth0 192.168.0.0 10.100.2.59 255.255.255.0 UG 0 0 0 eth0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 10.100.100.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 10.223.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.223.1.0 10.223.0.248 255.255.255.0 UG 0 0 0 eth0 10.100.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 10.222.0.0 10.100.100.52 255.255.0.0 UG 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0.2 10.223.0.0 10.100.2.248 255.255.0.0 UG 0 0 0 eth0 10.200.0.0 10.100.2.248 255.255.0.0 UG 0 0 0 eth0 10.170.0.0 10.223.0.249 255.255.0.0 UG 0 0 0 eth0 10.202.0.0 10.100.2.248 255.255.0.0 UG 0 0 0 eth0 10.0.0.0 10.100.2.254 255.0.0.0 UG 0 0 0 eth0 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 ``` ifconfig ```text eth0 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:92 inet adr:10.100.100.26 Bcast:10.100.255.255 Masque:255.255.0.0 adr inet6: fe80::215:c5ff:fe5d:ce92/64 Scope:Lien UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1657443501 errors:0 dropped:0 overruns:0 frame:0 TX packets:1746153285 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:1000 RX bytes:3084667397 (2.8 GiB) TX bytes:2426817556 (2.2 GiB) Adresse de base:0xecc0 Mémoire:fe9e0000-fea00000 eth0.2 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:92 inet adr:192.168.2.252 Bcast:192.168.2.255 Masque:255.255.255.0 adr inet6: fe80::215:c5ff:fe5d:ce92/64 Scope:Lien UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5147 errors:0 dropped:0 overruns:0 frame:0 TX packets:58552 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:0 RX bytes:1133094 (1.0 MiB) TX bytes:2507026 (2.3 MiB) eth0:0 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:92 inet adr:10.100.2.252 Bcast:10.100.255.255 Masque:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Adresse de base:0xecc0 Mémoire:fe9e0000-fea00000 eth0:2 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:92 inet adr:10.222.2.254 Bcast:10.222.2.255 Masque:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Adresse de base:0xecc0 Mémoire:fe9e0000-fea00000 eth0:3 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:92 inet adr:10.223.0.254 Bcast:10.223.0.255 Masque:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Adresse de base:0xecc0 Mémoire:fe9e0000-fea00000 eth1 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:93 inet adr:10.100.100.42 Bcast:10.100.100.255 Masque:255.255.255.0 adr inet6: fe80::215:c5ff:fe5d:ce93/64 Scope:Lien UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:263325447 errors:0 dropped:1 overruns:0 frame:0 TX packets:45697051 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:1000 RX bytes:500420388 (477.2 MiB) TX bytes:2513975125 (2.3 GiB) Adresse de base:0xdcc0 Mémoire:fe5e0000-fe600000 eth1:0 Link encap:Ethernet HWaddr 00:15:C5:5D:CE:93 inet adr:192.168.0.2 Bcast:192.168.255.255 Masque:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Adresse de base:0xdcc0 Mémoire:fe5e0000-fe600000 lo Link encap:Boucle locale inet adr:127.0.0.1 Masque:255.0.0.0 adr inet6: ::1/128 Scope:Hôte UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2248 errors:0 dropped:0 overruns:0 frame:0 TX packets:2248 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:0 RX bytes:387590 (378.5 KiB) TX bytes:387590 (378.5 KiB) ppp0 Link encap:Protocole Point-à-Point inet adr:217.128.196.79 P-t-P:193.253.160.3 Masque:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:192821 errors:0 dropped:0 overruns:0 frame:0 TX packets:177069 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:3 RX bytes:153565136 (146.4 MiB) TX bytes:59977854 (57.1 MiB) ``` cat /etc/resolv.conf ```text nameserver 10.100.2.10 nameserver 10.100.2.8 domain XXXXX.XX ``` iproute ```text 193.253.160.3 dev ppp0 proto kernel scope link src 217.128.196.79 193.16.159.180 via 10.100.2.254 dev eth0 10.222.2.0/24 dev eth0 proto kernel scope link src 10.222.2.254 5.5.100.0/24 via 10.100.2.254 dev eth0 192.168.2.0/24 dev eth0.2 proto kernel scope link src 192.168.2.252 193.108.167.0/24 via 10.100.2.254 dev eth0 192.168.0.0/24 via 10.100.2.59 dev eth0 192.168.0.0/24 dev eth1 proto kernel scope link src 192.168.0.2 10.100.100.0/24 dev eth1 proto kernel scope link src 10.100.100.42 10.223.0.0/24 dev eth0 proto kernel scope link src 10.223.0.254 10.223.1.0/24 via 10.223.0.248 dev eth0 10.100.0.0/16 dev eth0 proto kernel scope link src 10.100.100.26 10.222.0.0/16 via 10.100.100.52 dev eth0 169.254.0.0/16 dev eth0.2 scope link 10.223.0.0/16 via 10.100.2.248 dev eth0 10.200.0.0/16 via 10.100.2.248 dev eth0 10.170.0.0/16 via 10.223.0.249 dev eth0 10.202.0.0/16 via 10.100.2.248 dev eth0 10.0.0.0/8 via 10.100.2.254 dev eth0 default dev ppp0 scope link ``` Est-ce que vous voyez un problème dans la configuration ?

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