屑俺日記

☆ 色々分からないままあれこれ

何か古くなってるのかも。

$ sudo ip link add br0 type bridge
$nbsp;
$ dmesg | tail -n1
[  151.814771] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.

$ sudo ip link set eth1 master br0
$nbsp;
$ dmesg|tail  -n3
[  381.753875] br0: port 1(eth1) entered blocking state
[  381.759121] br0: port 1(eth1) entered disabled state
[  381.764918] device eth1 entered promiscuous mode

eth3本。1本をstretch なPCに接続。
残り2本をわざとループさせて、すぐ線を抜く。
その間、ICMP6のマルチキャストががどっと。

[  614.998783] IPv6: ADDRCONF(NETDEV_CHANGE): eth2: link becomes ready
[  615.009028] asix 1-1.5.3:1.0 eth2: link up, 100Mbps, full-duplex, lpa 0xC5E1
[  615.026375] br0: port 2(eth2) entered blocking state
[  615.031601] br0: port 2(eth2) entered forwarding state
[  615.113138] ax88179_178a 1-1.5.1:1.0 eth1: ax88179 - Link status is: 1
[  615.145431] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[  615.156912] br0: port 1(eth1) entered blocking state
[  615.180633] br0: port 1(eth1) entered forwarding state
[  615.229884] br0: received packet on eth2 with own address as source address
[  615.256233] br0: received packet on eth2 with own address as source address
# 以下同じのが延々と
[  616.265142] ax88179_178a 1-1.5.1:1.0 eth1: ax88179 - Link status is: 0
[  616.286385] br0: port 1(eth1) entered disabled state
[  616.305696] br0: port 2(eth2) entered disabled state

またループさせて、スパニングツリーを試す。

$ sleep 20; sudo brctl stp br0 on
 
[ 1329.012282] br0: received packet on eth2 with own address as source address
[ 1329.026181] br0: received packet on eth2 with own address as source address
[ 1329.040076] br0: received packet on eth2 with own address as source address
[ 1329.054470] br0: received packet on eth2 with own address as source address
[ 1330.572785] br0: topology change detected, propagating
[ 1330.585904] br0: port 2(eth2) entered blocking state

市販の安ルータをカスケード接続して、こちらをループさせてみた。
この場合、stpは効果がなかった。