Changes between Version 1 and Version 2 of TipAndDoc/VM/network/iproute

Timestamp:

Jun 27, 2009 3:52:55 AM (15 years ago)

Author:

mitty

Comment:

--

TipAndDoc/VM/network/iproute

@@ -213 +213 @@
   immediately. It is assumed that after a script finishes a batch of updates, it flushes
   the routing cache with '''ip route flush cache'''.
+
+ = ubuntu-inner-AB =
+ * see [../ping#ubuntu-outerrouterubuntu-inner-AB]
+
+ * routing table 設定
+   1. sudo ip route add default via 10.1.0.254 table 1
+   1. sudo ip route add default via 10.2.0.254 table 2
+ * routing policy 設定
+   1. sudo ip rule add from 10.1.0.0/16 table 1 prio 1
+   1. sudo ip rule add from 10.2.0.0/16 table 2 prio 2
+   * 上記[#centos-inner]と同様に、NICのIP or networkのどちらでも良い
+
+ = ubuntu-inner-AA =
+ * see [../ping#unexpected]
+
+ * routing table 設定
+   1. sudo ip route add default via 10.1.0.254 dev eth0 table 10
+   1. sudo ip route add default via 10.1.0.254 dev eth1 table 20
+ * routing policy 設定
+   1. sudo ip rule add from 10.1.0.10 table 10 prio 1
+   1. sudo ip rule add from 10.1.0.20 table 20 prio 2
+
+ * ~~requestに関しては、eth1(10.1.0.20)ではなくeth0(10.1.0.10)側に届いてしまう~~
+   * ~~VMなのが問題なのか、route設定がおかしいのか謎~~
+ * ubuntu-outer:~$ ping 10.1.0.20 -c 1
+{{{
+PING 10.1.0.20 (10.1.0.20) 56(84) bytes of data.
+64 bytes from 10.1.0.20: icmp_seq=1 ttl=63 time=18.0 ms
+
+--- 10.1.0.20 ping statistics ---
+1 packets transmitted, 1 received, 0% packet loss, time 0ms
+rtt min/avg/max/mdev = 18.019/18.019/18.019/0.000 ms
+}}}
+   1. ubuntu-outer:eth1
+{{{
+03:21:26.529593 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 28200, seq 1, length 64
+03:21:26.547598 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 28200, seq 1, length 64
+}}}
+   1. ubuntu-router:eth0
+{{{
+03:21:26.528120 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 28200, seq 1, length 64
+03:21:26.535301 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 28200, seq 1, length 64
+}}}
+   1. ubuntu-router:eth1
+{{{
+03:21:26.529233 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 28200, seq 1, length 64
+03:21:26.534766 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 28200, seq 1, length 64
+03:21:26.535841 IP 10.1.0.254 > 10.1.0.10: ICMP redirect 10.1.0.110 to host 10.1.0.110, length 188
+}}}
+   1. ubuntu-inner-AA:eth0
+{{{
+03:21:26.516873 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 28200, seq 1, length 64
+03:21:26.523308 IP 10.1.0.254 > 10.1.0.10: ICMP redirect 10.1.0.110 to host 10.1.0.110, length 188
+}}}
+   1. ubuntu-inner-AA:eth1
+{{{
+03:21:26.520911 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 28200, seq 1, length 64
+}}}
+
+ * 数分放置したところrequestもeth1に届くようになった => cacheのせい？
+ * ubuntu-outer:~$ ping 10.1.0.20 -c 1
+   1. ubuntu-inner-AA:eth1
+{{{
+03:31:16.124510 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 49704, seq 1, length 64
+03:31:16.125227 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 49704, seq 1, length 64
+}}}
+
+ * ubuntu-inner-AA上のrouting policyを削除したところ、前とは逆にeth1にrequest、eth0からreplyという状態になった。
+   * ubuntu-inner-AA:~$ sudo ip rule del prefer 1
+   * ubuntu-inner-AA:~$ sudo ip rule del prefer 2
+   * ubuntu-outer:~$ ping 10.1.0.20 -c 1
+     1. ubuntu-inner-AA:eth1
+{{{
+03:35:13.581262 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 58152, seq 1, length 64
+}}}
+     1. ubuntu-inner-AA:eth0
+{{{
+03:35:13.581520 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 58152, seq 1, length 64
+}}}
+ * ~~いよいよもって謎。~~
+   * これも数分放置したところ、eth0のみを通る状態に戻ったので、やはりcacheのせいと思われる
+ * ubuntu-outer:~$ ping 10.1.0.20 -c 1
+   1. ubuntu-inner-AA:eth0
+{{{
+03:46:28.309953 IP 10.0.0.10 > 10.1.0.20: ICMP echo request, id 16425, seq 1, length 64
+03:46:28.310817 IP 10.1.0.20 > 10.0.0.10: ICMP echo reply, id 16425, seq 1, length 64
+}}}