On Tue, Oct 09, 2012 at 05:58:01PM +0200, Rodolfo Giometti wrote:
> On Tue, Oct 09, 2012 at 06:42:36PM +0300, Vitalii Demianets wrote:
> > Hello, Rodolfo!
> >
> > Please, describe your setup: how many devices do you have and how exactly
> > are
> > they connected?
>
> ASCII Art:
>
> +------------+
> | my machine |----+
> +------------+ |
> | +------------+
> | | |
> | +------------+
> +------------+ |
> | root |----+ <----[A]
> +------------+
>
> The "Event" is: the ring is opened in [A]
Here another useful packets dump!
As you can see, when the Event occours, I see:
11:10:32.775132 STP 802.1w, Rapid STP, Flags [Proposal], bridge-id
8000.00:0a:dc:5a:f6:80.800d, length 43
message-age 0.00s, max-age 20.00s, hello-time 2.00s,
forwarding-delay 16.00s
root-id 8000.00:0a:dc:5a:f6:80, root-pathcost 0, port-role
Designated
0x0000: 0180 c200 0000 000a dc5a f68d 0027 4242
.........Z...'BB
0x0010: 0300 0002 020e 8000 000a dc5a f680 0000
...........Z....
0x0020: 0000 8000 000a dc5a f680 800d 0000 1400
.......Z........
0x0030: 0200 1000 0031 3030 4e43 2d52 .....100NC-R
Here the other bridge says to my machine: «Ehi! Something happens. Can
I be the new root?»
11:10:34.107952 STP 802.1w, Rapid STP, Flags [Proposal], bridge-id
8000.00:02:3e:99:f5:01.8001, length 43
message-age 1.00s, max-age 20.00s, hello-time 2.00s,
forwarding-delay 16.00s
root-id 5000.00:0a:dc:5a:e5:20, root-pathcost 200000, port-role
Designated
0x0000: 0180 c200 0000 0002 3e99 f501 0027 4242
........>....'BB
0x0010: 0300 0002 020e 5000 000a dc5a e520 0003
......P....Z....
0x0020: 0d40 8000 0002 3e99 f501 8001 0100 1400
.@....>.........
0x0030: 0200 1000 0000 0000 0000 0000 ............
But my machine answers after ~1.3s! :'(
__This__ is a very loooong delay...
Here the internal state machine evolution:
1038910509.154586: MSTP_IN_rx_bpdu: br0:mrvl4 received RST BPDU
1038910509.186205: PISM_to_RECEIVE: br0:mrvl4:0
1038910509.190962: PISM_to_SUPERIOR_DESIGNATED: br0:mrvl4:0
1038910509.195441: PISM_to_CURRENT: br0:mrvl4:0
1038910509.290554: bridge_bpdu_rcv: ifindex 7, len 60
1038910509.293467: MSTP_IN_rx_bpdu: br0:mrvl5 received RST BPDU
1038910509.325087: PISM_to_UPDATE: br0:mrvl4:0
1038910509.329836: PISM_to_CURRENT: br0:mrvl4:0
1038910509.334226: PISM_to_RECEIVE: br0:mrvl5:0
1038910509.338713: PISM_to_SUPERIOR_DESIGNATED: br0:mrvl5:0
1038910509.343204: PISM_to_CURRENT: br0:mrvl5:0
1038910509.484400: PISM_to_UPDATE: br0:mrvl4:0
1038910509.489145: PISM_to_CURRENT: br0:mrvl4:0
1038910510.479677: MSTP_OUT_tx_bpdu: br0:mrvl4 sending RST BPDU
1038910510.504499: MSTP_OUT_set_state: br0:mrvl4:0 entering learning state
1038910510.512247: set_port_role: port mrvl4 role 3
1038910510.525581: bridge_bpdu_rcv: ifindex 6, len 60
1038910510.530389: MSTP_IN_rx_bpdu: br0:mrvl4 received RST BPDU
1038910510.564881: PISM_to_RECEIVE: br0:mrvl4:0
1038910510.569636: PISM_to_NOT_DESIGNATED: br0:mrvl4:0
1038910510.574111: PISM_to_CURRENT: br0:mrvl4:0
1038910510.593195: MSTP_OUT_set_state: br0:mrvl4:0 entering forwarding state
As you can see we receive the first BPDU at 1038910509.154586 and only
after ~1.3s we send our reply at 1038910510.479677
Why we need all this state transitions?
1038910509.154586: MSTP_IN_rx_bpdu: br0:mrvl4 received RST BPDU
1038910509.186205: PISM_to_RECEIVE: br0:mrvl4:0
1038910509.190962: PISM_to_SUPERIOR_DESIGNATED: br0:mrvl4:0
1038910509.195441: PISM_to_CURRENT: br0:mrvl4:0
1038910509.325087: PISM_to_UPDATE: br0:mrvl4:0
1038910509.329836: PISM_to_CURRENT: br0:mrvl4:0
1038910509.484400: PISM_to_UPDATE: br0:mrvl4:0
1038910509.489145: PISM_to_CURRENT: br0:mrvl4:0
1038910510.479677: MSTP_OUT_tx_bpdu: br0:mrvl4 sending RST BPDU
Thanks in advance,
Rodolfo
--
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