Hi all.
I have a networking problem here I'd like to share.
Cut down FC4 build on an IBM e326.
I am attempting to SCP 2.4MB of data to this box ( from anywhere the
results are the same ).
It connects, asks for password, which I give. And then after a few
packets I see it all go very ugly indeed. Throwing retransmissions and,
segment losts, and DUP ACK messages.
Which just kills the scp with a "Stalled" message. If I leave it then
_eventaully_ the file will transfer.
I've changed switches and have the same result. Starting to wonder if
there is a problem with the Broadcom ethernet controller? One of the
reasons I suspect the controller is performance jumps to normal (good)
after I reinitialise the card.
Server end :
4.913749 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=144
4.916377 10.0.2.31 -> 10.0.2.27 SSHv2 Encrypted response packet
len=32
4.916533 10.0.2.27 -> 10.0.2.31 TCP 60952 > ssh [ACK] Seq=1293
Ack=1597 Win=8400 Len=0 TSV=2056922151 TSER=5310028
4.916828 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=64
4.916965 10.0.2.31 -> 10.0.2.27 SSHv2 Encrypted response packet
len=48
4.917276 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=64
4.918916 10.0.2.31 -> 10.0.2.27 SSHv2 Encrypted response packet
len=48
4.958139 10.0.2.27 -> 10.0.2.31 TCP 60952 > ssh [ACK] Seq=1421
Ack=1693 Win=8400 Len=0 TSV=2056922193 TSER=5310031
4.958153 10.0.2.31 -> 10.0.2.27 SSHv2 Encrypted response packet
len=48
4.958306 10.0.2.27 -> 10.0.2.31 TCP 60952 > ssh [ACK] Seq=1421
Ack=1741 Win=8400 Len=0 TSV=2056922193 TSER=5310070
4.958609 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=64
4.958762 10.0.2.31 -> 10.0.2.27 SSHv2 Encrypted response packet
len=48
4.962323 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
4.962446 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
4.962451 10.0.2.31 -> 10.0.2.27 TCP ssh > 60952 [ACK] Seq=1789
Ack=4381 Win=15424 Len=0 TSV=5310074 TSER=2056922196
4.962986 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
4.963239 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Previous segment
lost] Encrypted request packet len=1448
4.963244 10.0.2.31 -> 10.0.2.27 TCP ssh > 60952 [ACK] Seq=1789
Ack=5829 Win=18320 Len=0 TSV=5310075 TSER=2056922197 SLE=7277 SRE=8725
4.963780 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
4.963785 10.0.2.31 -> 10.0.2.27 TCP [TCP Dup ACK 46#1] ssh >
60952 [ACK] Seq=1789 Ack=5829 Win=18320 Len=0 TSV=5310076
TSER=2056922197 SLE=7277 SRE=10173
5.178550 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Retransmission]
Encrypted request packet len=1448
5.178557 10.0.2.31 -> 10.0.2.27 TCP ssh > 60952 [ACK] Seq=1789
Ack=10173 Win=21216 Len=0 TSV=5310290 TSER=2056922413
5.179217 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Previous segment
lost] Encrypted request packet len=1448
5.179221 10.0.2.31 -> 10.0.2.27 TCP [TCP Dup ACK 50#1] ssh >
60952 [ACK] Seq=1789 Ack=10173 Win=21216 Len=0 TSV=5310291
TSER=2056922413 SLE=11621 SRE=13069
5.179741 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
5.179745 10.0.2.31 -> 10.0.2.27 TCP [TCP Dup ACK 50#2] ssh >
60952 [ACK] Seq=1789 Ack=10173 Win=21216 Len=0 TSV=5310292
TSER=2056922413 SLE=11621 SRE=14517
5.180252 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
5.180255 10.0.2.31 -> 10.0.2.27 TCP [TCP Dup ACK 50#3] ssh >
60952 [ACK] Seq=1789 Ack=10173 Win=21216 Len=0 TSV=5310292
TSER=2056922413 SLE=11621 SRE=15965
5.391515 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Retransmission]
Encrypted request packet len=1448
5.391520 10.0.2.31 -> 10.0.2.27 TCP ssh > 60952 [ACK] Seq=1789
Ack=15965 Win=24112 Len=0 TSV=5310503 TSER=2056922626
5.392043 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
5.392048 10.0.2.31 -> 10.0.2.27 TCP ssh > 60952 [ACK] Seq=1789
Ack=17413 Win=27008 Len=0 TSV=5310504 TSER=2056922626
5.603540 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Out-Of-Order]
Encrypted request packet len=1448
5.603546 10.0.2.31 -> 10.0.2.27 TCP [TCP Dup ACK 60#1] ssh >
60952 [ACK] Seq=1789 Ack=17413 Win=27008 Len=0 TSV=5310715
TSER=2056922838 SLE=15965 SRE=17413
Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet - tg3 driver.
# ethtool eth0
Settings for eth0:
Supported ports: [ MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: Not reported
Advertised auto-negotiation: No
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: g
Wake-on: d
Current message level: 0x000000ff (255)
Link detected: yes
Client end :
5.019926 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Retransmission]
Encrypted request packet len=1448
5.020438 10.0.2.31 -> 10.0.2.27 TCP ssh > 35380 [ACK] Seq=1789
Ack=7277 Win=21216 Len=0 TSV=6343633 TSER=2057955472 SLE=4381 SRE=5829
5.020513 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
5.020523 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
5.263902 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Retransmission]
Encrypted request packet len=1448
5.264426 10.0.2.31 -> 10.0.2.27 TCP ssh > 35380 [ACK] Seq=1789
Ack=10173 Win=24112 Len=0 TSV=6343877 TSER=2057955920
5.264464 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Retransmission]
Encrypted request packet len=1448
5.264475 10.0.2.27 -> 10.0.2.31 SSHv2 Encrypted request packet
len=1448
5.500935 10.0.2.27 -> 10.0.2.31 SSHv2 [TCP Retransmission]
Encrypted request packet len=1448
Client shows retransmissions but no DUP Ack or segment lost messages.
Any ideas? I have other servers running with Broadcom BCM5703X chips and
using the tg3 driver without problem.
