Changes between Version 2 and Version 3 of TipAndDoc/network/defaultgw

Timestamp:

Jun 11, 2009 2:12:59 AM (15 years ago)

Author:

mitty

Comment:

--

TipAndDoc/network/defaultgw

@@ -4 +4 @@
  * default gateway (default route)の変更方法・扱い
 
- = 複数設定されているとき =
+ = 複数設定について =
  == CentOS ==
  === ifcfg-eth? ===
@@ -140 +140 @@
 default         192.168.50.1    0.0.0.0         UG    0      0        0 eth0
 }}}
+
+ === route コマンド ===
+ * 以下の状態でroute addする
+{{{
+Kernel IP routing table
+Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
+192.168.50.0    *               255.255.255.0   U     0      0        0 eth0
+192.168.40.0    *               255.255.255.0   U     0      0        0 eth1
+169.254.0.0     *               255.255.0.0     U     0      0        0 eth1
+default         192.168.50.1    0.0.0.0         UG    0      0        0 eth0
+}}}
+
+ * route add default gw 192.168.40.1
+{{{
+default         192.168.40.1    0.0.0.0         UG    0      0        0 eth1
+default         192.168.50.1    0.0.0.0         UG    0      0        0 eth0
+}}}
+   * この場合、実際にはeth1を通る
+{{{
+listening on eth1, link-type EN10MB (Ethernet), capture size 96 bytes
+02:03:27.195895 IP 192.168.40.200 > 219.94.129.108: ICMP echo request, id 51265, seq 1, length 64
+02:03:27.212349 IP 219.94.129.108 > 192.168.40.200: ICMP echo reply, id 51265, seq 1, length 64
+}}}
+ * route add default gw 192.168.0.1
+{{{
+SIOCADDRT: Network is unreachable
+}}}
+   * routing table は変化せず