TCP Transfers slowing down
Jason Coene
jcoene at gotfrag.com
Mon Aug 15 05:36:23 GMT 2005
Hi Mike,
Thanks for the response. I've attached what you requested as a text file in
case the following gets garbled by Outlook.
Thanks, Jason
--
>From a FreeBSD Machine:
root at xxx.xxx.xxx> netstat -ni
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs
Coll
em0 1500 <Link#1> 00:0c:76:81:8d:f4 214153777 0 90481655 0
0
em0 1500 10.54.54/24 10.54.54.64 213309137 - 90480476 -
-
em0 1500 fe80:1::20c:7 fe80:1::20c:76ff: 0 - 5 -
-
fxp0 1500 <Link#2> 00:0c:76:81:8d:f5 135087023 1 214628700 1
0
fxp0 1500 66.208.110/24 66.208.110.64 127803193 - 214627883 -
-
fxp0 1500 fe80:2::20c:7 fe80:2::20c:76ff: 0 - 5 -
-
lo0 16384 <Link#3> 17472 0 17472 0
0
lo0 16384 127 127.0.0.1 17472 - 17472 -
-
lo0 16384 ::1/128 ::1 0 - 0 -
-
lo0 16384 fe80:3::1/64 fe80:3::1 0 - 0 -
-
pflog 33208 <Link#4> 0 0 0 0
0
root at xxx.xxx.xxx> ifconfig fxp0
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8<VLAN_MTU>
inet 66.208.110.64 netmask 0xffffff00 broadcast 66.208.110.255
inet6 fe80::20c:76ff:fe81:8df5%fxp0 prefixlen 64 scopeid 0x2
ether 00:0c:76:81:8d:f5
media: Ethernet 100baseTX <full-duplex>
status: active
>From the Cisco:
xxx.xxx.xxx#show int fa0/4
FastEthernet0/4 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 000b.5fb7.b204 (bia 000b.5fb7.b204)
Description: Web Server 4
MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 3/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 1406000 bits/sec, 100 packets/sec
5 minute output rate 57000 bits/sec, 71 packets/sec
1118722925 packets input, 2492078882 bytes, 0 no buffer
Received 3702 broadcasts, 0 runts, 0 giants, 0 throttles
3 input errors, 0 CRC, 3 frame, 0 overrun, 25144 ignored
0 watchdog, 13 multicast, 0 pause input
0 input packets with dribble condition detected
720143589 packets output, 549572280 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
xxx.xxx.xxx#show run
<snip>
!
interface FastEthernet0/4
description Web Server 4
no ip address
duplex full
speed 100
!
<snip>
> -----Original Message-----
> From: Mike Tancsa [mailto:mike at sentex.net]
> Sent: Monday, August 15, 2005 12:30 AM
> To: Jason Coene; freebsd-performance at freebsd.org
> Subject: Re: TCP Transfers slowing down
>
> At 04:37 PM 14/08/2005, Jason Coene wrote:
> >Before the update, the servers would sustain high transfer rates (well
> over
> >4 Mbyte/sec), but since the update that has changed. A transfer will
> start
> >out at normal speed (as high as we've ever seen), but it will immediately
> >and consistently drop to between 200 and 300 KByte/sec. It will stay
> >constant at that speed for the duration of the connection.
>
> Can you post
> netstat -ni
> ifconfig fxp0
> and a
> show int fa0/<whatever the switch port is>
> as well as fa0/<whatever the switch port is config>
>
>
> ---Mike
-------------- next part --------------
>From a FreeBSD Machine:
root at xxx.xxx.xxx> netstat -ni
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
em0 1500 <Link#1> 00:0c:76:81:8d:f4 214153777 0 90481655 0 0
em0 1500 10.54.54/24 10.54.54.64 213309137 - 90480476 - -
em0 1500 fe80:1::20c:7 fe80:1::20c:76ff: 0 - 5 - -
fxp0 1500 <Link#2> 00:0c:76:81:8d:f5 135087023 1 214628700 1 0
fxp0 1500 66.208.110/24 66.208.110.64 127803193 - 214627883 - -
fxp0 1500 fe80:2::20c:7 fe80:2::20c:76ff: 0 - 5 - -
lo0 16384 <Link#3> 17472 0 17472 0 0
lo0 16384 127 127.0.0.1 17472 - 17472 - -
lo0 16384 ::1/128 ::1 0 - 0 - -
lo0 16384 fe80:3::1/64 fe80:3::1 0 - 0 - -
pflog 33208 <Link#4> 0 0 0 0 0
root at xxx.xxx.xxx> ifconfig fxp0
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8<VLAN_MTU>
inet 66.208.110.64 netmask 0xffffff00 broadcast 66.208.110.255
inet6 fe80::20c:76ff:fe81:8df5%fxp0 prefixlen 64 scopeid 0x2
ether 00:0c:76:81:8d:f5
media: Ethernet 100baseTX <full-duplex>
status: active
>From the Cisco:
xxx.xxx.xxx#show int fa0/4
FastEthernet0/4 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 000b.5fb7.b204 (bia 000b.5fb7.b204)
Description: Web Server 4
MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 3/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 1406000 bits/sec, 100 packets/sec
5 minute output rate 57000 bits/sec, 71 packets/sec
1118722925 packets input, 2492078882 bytes, 0 no buffer
Received 3702 broadcasts, 0 runts, 0 giants, 0 throttles
3 input errors, 0 CRC, 3 frame, 0 overrun, 25144 ignored
0 watchdog, 13 multicast, 0 pause input
0 input packets with dribble condition detected
720143589 packets output, 549572280 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
xxx.xxx.xxx#show run
<snip>
!
interface FastEthernet0/4
description Web Server 4
no ip address
duplex full
speed 100
!
<snip>
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