Fwd: Networking Problems
--- Pablo Limon <pelgv2@yahoo.com> wrote:
> Date: Tue, 8 Jul 2003 13:40:31 -0700 (PDT)
> From: Pablo Limon <pelgv2@yahoo.com>
> Subject: Networking Problems
> To: debian-user@lists.debian.org
>
> Hello, Im new to the list, and I have a new problem,
> one that I havent seen before.
> I have a pcmcia card, a CNET SiglePoint 10/100
> FastEthernet PCcard atached to a Compaq Presario
> 1711LA computer. This is eth1. Eth0 is the internal
> Ethernet card and is atached to a ADSL modem. Eth1
> is
> the intranet. Suddently something started to go
> wrong.
> I just cant figure whats that, because I cant thing
> of
> something I have done.
> The intranet started to fail a lot. I send some
> pings
> of 56Bytes and everythin was ok for the first
> paquets,
> until more less 10 pakets after the test began, a
> paquet intsead of returning in .3ms returned in
> 10000ms, the next to 8000ms, next 6000ms or so. That
> went for some packets and then again 10 pakets at
> .3ms
> and the cycle began again. I tested with a ping size
> paket of 2048 and the same happened just of instad
> .3ms it was 3ms...
> But I also tested for values of 1024 and 1500 (the
> MTU
> value) and then, there where lots of pakets that
> never
> arrived. (using flood option) and I got this
> messages
> in kern.log: (at the end Ill post some tests I did)
>
> Jul 8 14:19:07 pablap kernel: NETDEV WATCHDOG:
> eth1:
> transmit timed out
> Jul 8 14:19:07 pablap kernel: eth1: Tx queue start
> entry 32 dirty entry 28.
> Jul 8 14:19:07 pablap kernel: eth1: Tx descriptor
> 0
> is 00002000. (queue head)
> Jul 8 14:19:07 pablap kernel: eth1: Tx descriptor
> 1
> is 00002000.
> Jul 8 14:19:07 pablap kernel: eth1: Tx descriptor
> 2
> is 00002000.
> Jul 8 14:19:07 pablap kernel: eth1: Tx descriptor
> 3
> is 00002000.
> Jul 8 14:19:07 pablap kernel: eth1: Setting 100mbps
> full-duplex based on auto-negotiated partner ability
> 45e1.
>
> -------------------
>
> pablap:/var/log# ping -s 1024 192.168.30.200
> PING 192.168.30.200 (192.168.30.200): 1024 data
> bytes
> 1032 bytes from 192.168.30.200: icmp_seq=0 ttl=128
> time=0.9 ms
> 1032 bytes from 192.168.30.200: icmp_seq=5 ttl=128
> time=11001.0 ms
> 1032 bytes from 192.168.30.200: icmp_seq=6 ttl=128
> time=10001.1 ms
> 1032 bytes from 192.168.30.200: icmp_seq=7 ttl=128
> time=9001.1 ms
> 1032 bytes from 192.168.30.200: icmp_seq=8 ttl=128
> time=8001.4 ms
> 1032 bytes from 192.168.30.200: icmp_seq=9 ttl=128
> time=7002.0 ms
> 1032 bytes from 192.168.30.200: icmp_seq=10 ttl=128
> time=6002.0 ms
> 1032 bytes from 192.168.30.200: icmp_seq=14 ttl=128
> time=2002.2 ms
> 1032 bytes from 192.168.30.200: icmp_seq=15 ttl=128
> time=1002.6 ms
> 1032 bytes from 192.168.30.200: icmp_seq=16 ttl=128
> time=2.8 ms
> 1032 bytes from 192.168.30.200: icmp_seq=17 ttl=128
> time=0.8 ms
>
> --- 192.168.30.200 ping statistics ---
> 21 packets transmitted, 11 packets received, 47%
> packet loss
> round-trip min/avg/max = 0.8/4910.7/11001.0 ms
>
> ------------------
>
> I couldnt reproduce what happened when using 56B and
> 2048B, in 56B all packets where back in .2ms and in
> 2048B where back in 1.1ms exept 2 of 25 that where
> back in 56ms
>
> ----------------
> flood testespablap:/var/log# ping -f -s 56
> 192.168.30.200
> PING 192.168.30.200 (192.168.30.200): 56 data bytes
> ...
> --- 192.168.30.200 ping statistics ---
> 49421 packets transmitted, 49418 packets received,
> 0%
> packet loss
> round-trip min/avg/max = 0.1/0.2/6.1 ms
>
> ----------------
> pablap:/var/log# ping -f -s 2048 192.168.30.200
> PING 192.168.30.200 (192.168.30.200): 2048 data
> bytes
> .................................
> --- 192.168.30.200 ping statistics ---
> 11679 packets transmitted, 11646 packets received,
> 0%
> packet loss
> round-trip min/avg/max = 0.9/14.3/28.2 ms
>
> ----------------
>
>
> pablap:/var/log# ping -f -s 1024 192.168.30.200
> PING 192.168.30.200 (192.168.30.200): 1024 data
> bytes
>
.........................................................
> --- 192.168.30.200 ping statistics ---
> 59 packets transmitted, 1 packets received, 98%
> packet
> loss
> round-trip min/avg/max = 18.1/18.1/18.1 ms
>
> ----------------
> ifconfig:
>
> pablap:/var/log# ifconfig
> eth0 Link encap:Ethernet HWaddr
> 00:02:A5:9B:89:09
> inet addr:x.x.x.x Bcast:x.x.x.x
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500
> Metric:1
> RX packets:3119 errors:0 dropped:0
> overruns:0 frame:0
> TX packets:3133 errors:0 dropped:0
> overruns:0 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:1722708 (1.6 MiB) TX
> bytes:389532
> (380.4 KiB)
> Interrupt:9 Base address:0xf000
>
> eth1 Link encap:Ethernet HWaddr
> 00:10:60:75:30:A6
> inet addr:192.168.30.1
> Bcast:192.168.30.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500
> Metric:1
> RX packets:74238 errors:0 dropped:0
> overruns:0 frame:0
> TX packets:74072 errors:0 dropped:0
> overruns:16 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:29954078 (28.5 MiB) TX
> bytes:30184567 (28.7 MiB)
> Interrupt:10 Base address:0x4000
>
> 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:402 errors:0 dropped:0
> overruns:0
> frame:0
> TX packets:402 errors:0 dropped:0
> overruns:0
> carrier:0
> collisions:0 txqueuelen:0
> RX bytes:20312 (19.8 KiB) TX bytes:20312
> (19.8 KiB)
>
> ppp0 Link encap:Point-to-Point Protocol
> inet addr:x.x.x.x P-t-P:x.x.x.x
> Mask:255.255.255.255
> UP POINTOPOINT RUNNING NOARP MULTICAST
> MTU:1492 Metric:1
> RX packets:2555 errors:0 dropped:0
> overruns:0 frame:0
> TX packets:2499 errors:0 dropped:0
> overruns:0 carrier:0
> collisions:0 txqueuelen:3
> RX bytes:1632530 (1.5 MiB) TX
> bytes:302633
> (295.5 KiB)
>
> It is pppoe...
>
> ---------------
> Any ideas???? any other tests I should include in a
> future mail?
> Thanks in advance
> Pablo E. Limon
>
>
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