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Date: Thu, 23 Aug 2012 14:31:26 +0800 From: Wei Huang <daviseago@...il.com> To: netdev@...r.kernel.org, netfilter@...r.kernel.org Subject: Which one is chosen on multiple default gateway set? Hi, If multiple default gateways are set, which one will be chosen? And if the chosen one is down, will others take over? It works sometime, but not most of the time. (example below) The behavior is inconsistent. How the case is handled? On what condition another default gateway is chosen? Thank you! ======================= ~ # ip r 10.65.30.0/24 dev bond0 src 10.65.30.71 default via 10.65.30.221 dev bond0 (this one is down!) default via 10.65.30.1 dev bond0 ~ # ip r get 8.8.8.8 8.8.8.8 via 10.65.30.221 dev bond0 src 10.65.30.71 ~ # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8): 56 data bytes --- 8.8.8.8 ping statistics --- 3 packets transmitted, 0 packets received, 100% packet loss // after a while ~ # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8): 56 data bytes 64 bytes from 8.8.8.8: icmp_seq=0 ttl=56 time=5.0 ms ~ # ip r get 8.8.8.8 8.8.8.8 via 10.65.30.1 dev bond0 src 10.65.30.71 // after two while ~ # ip r get 8.8.8.8 8.8.8.8 via 10.65.30.221 dev bond0 src 10.65.30.71 ~ # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8): 56 data bytes --- 8.8.8.8 ping statistics --- 2 packets transmitted, 0 packets received, 100% packet loss ================================== Best regards, Wei -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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