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Problem with bonding, vlan, bridge, veth [message #8201] Fri, 10 November 2006 10:12 Go to previous message
kfh is currently offline  kfh
Messages: 28
Registered: October 2006
Junior Member
Hi list,

I have a bonding/vlan/bridge/veth problem.
Sometimes a bridge think a veth device move to another port.
If I remove a physical interface from bond, the bridge behaves normally.

Kernel 2.6.16 + openvz test020
VE0 Ubuntu dapper/6.06LTS, IP 172.31.1.26 on VLAN 254
VE1028 Debian stable/sarge/3.1, IP 10.1.28.12 on VLAN 28

I have a server (vs5, VE0) using eth0 and eth1 in a bonding interface bond0.
bond0 is on tagged vlan.
I create a vlan device vlan254 on vlan 254. This is VE0 IP.
For each VE (XX) I do
create a vlan device vlanXX on vlan XX.
create a bridge bvXX and add vlanXX to it.
create a VE (VE10XX) using veth.
VETH="ve10XX.0,aa:00:04:56:YY:ZZ,eth0,aa:00:04:57:YY:ZZ"
add ve10XX.0 to the bridge.
YY and ZZ are calculated from VEID number (VLAN + 1000)

eth0 eth1
\ /
bond0
/ \ veth
vlan254 vlanXX ve10XX.0 -- eth0 (ve10XX)
VE0 \ /
bvXX (bridge)

I create and start VE1028, now I have:

VE0# ifconfig
bond0 Link encap:Ethernet HWaddr 00:18:8B:2F:5F:F2
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:888940 errors:0 dropped:0 overruns:0 frame:0
TX packets:150577 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:71916311 (68.5 MiB) TX bytes:27093123 (25.8 MiB)

bv28 Link encap:Ethernet HWaddr 00:18:8B:2F:5F:F2
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4559 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:212782 (207.7 KiB) TX bytes:0 (0.0 b)

eth0 Link encap:Ethernet HWaddr 00:18:8B:2F:5F:F2
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:659778 errors:0 dropped:0 overruns:0 frame:0
TX packets:150577 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:56333295 (53.7 MiB) TX bytes:27093123 (25.8 MiB)
Base address:0xecc0 Memory:dfae0000-dfb00000

eth1 Link encap:Ethernet HWaddr 00:18:8B:2F:5F:F2
UP BROADCAST RUNNING NOARP SLAVE MULTICAST MTU:1500 Metric:1
RX packets:229162 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:15583016 (14.8 MiB) TX bytes:0 (0.0 b)
Base address:0xdcc0 Memory:df8e0000-df900000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:352 (352.0 b) TX bytes:352 (352.0 b)

ve1028.0 Link encap:Ethernet HWaddr AA:00:04:56:04:04
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:225 errors:0 dropped:0 overruns:0 frame:0
TX packets:4700 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:41399 (40.4 KiB) TX bytes:260688 (254.5 KiB)

venet0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

vlan28 Link encap:Ethernet HWaddr 00:18:8B:2F:5F:F2
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:190890 errors:0 dropped:0 overruns:0 frame:0
TX packets:32868 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11008978 (10.4 MiB) TX bytes:4038500 (3.8 MiB)

vlan254 Link encap:Ethernet HWaddr 00:18:8B:2F:5F:F2
inet addr:172.31.1.26 Bcast:172.31.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:490936 errors:0 dropped:0 overruns:0 frame:0
TX packets:77435 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:23453611 (22.3 MiB) TX bytes:10026463 (9.5 MiB)


VE1028# ifconfig
eth0 Link encap:Ethernet HWaddr AA:00:04:57:04:04
inet addr:10.1.28.12 Bcast:10.1.28.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4887 errors:0 dropped:0 overruns:0 frame:0
TX packets:231 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:271148 (264.7 KiB) TX bytes:43395 (42.3 KiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)


>From VE1028 I ping a router (10.1.28.4)
VE1028# ping 10.1.28.4

VE0# brctl showmacs bv28
port no mac addr is local? ageing timer
1 00:18:8b:2f:5f:f2 yes 0.00
1 02:e0:52:16:95:1c no 0.00
2 aa:00:04:56:04:04 yes 0.00
2 aa:00:04:57:04:04 no 0.00

>From VE1028 I ping another router (10.1.28.101)
I don't get arp replies in VE1028
If I run tcpdump on VE0/bv28, I see the replies.

VE0# brctl showmacs bv28
port no mac addr is local? ageing timer
1 00:03:fa:0f:a3:a7 no 0.15
1 00:18:8b:2f:5f:f2 yes 0.00
1 02:e0:52:16:95:1c no 0.79
2 aa:00:04:56:04:04 yes 0.00
1 aa:00:04:57:04:04 no 0.15

Now the bridge thinks VE1028/eth0 moved to port 1.
aa:00:04:57:04:04 never gets the replies, as the bridge
doesn't forward the frames, when src and dest are on same port.

I can even do this.
VE1028# ping 10.1.28.4 & ping 10.1.28.101
PING 10.1.28.4 (10.1.28.4) 56(84) bytes of data.
[1] 3472
PING 10.1.28.101 (10.1.28.101) 56(84) bytes of data.
64 bytes from 10.1.28.4: icmp_seq=1 ttl=64 time=0.284 ms
64 bytes from 10.1.28.4: icmp_seq=2 ttl=64 time=0.207 ms
64 bytes from 10.1.28.4: icmp_seq=3 ttl=64 time=0.130 ms
64 bytes from 10.1.28.4: icmp_seq=4 ttl=64 time=0.175 ms
>From 10.1.28.12 icmp_seq=1 Destination Host Unreachable
>From 10.1.28.12 icmp_seq=2 Destination Host Unreachable
>From 10.1.28.12 icmp_seq=3 Destination Host Unreachable
64 bytes from 10.1.28.4: icmp_seq=5 ttl=64 time=0.176 ms
64 bytes from 10.1.28.4: icmp_seq=6 ttl=64 time=0.128 ms
64 bytes from 10.1.28.4: icmp_seq=7 ttl=64 time=0.173 ms
>From 10.1.28.12 icmp_seq=5 Destination Host Unreachable
>From 10.1.28.12 icmp_seq=6 Destination Host Unreachable
>From 10.1.28.12 icmp_seq=7 Destination Host Unreachable

Why does the bridge forward some frames
and block others to the same mac addr?

If I remove one physical interface from the bond, I have no problems
VE0# ifenslave -d bond0 eth1

continued output from VE1028...
64 bytes from 10.1.28.101: icmp_seq=8 ttl=64 time=1.04 ms
64 bytes from 10.1.28.4: icmp_seq=8 ttl=64 time=0.160 ms
64 bytes from 10.1.28.101: icmp_seq=9 ttl=64 time=1.22 ms
64 bytes from 10.1.28.4: icmp_seq=9 ttl=64 time=0.215 ms

Regards,
Kristian Høgh

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