Date: Thu, 11 Nov 2010 13:01:26 +0800 From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> To: freebsd-stable@freebsd.org Subject: Re: icmp packets on em larger than 1472 [SEC=UNCLASSIFIED] Message-ID: <20101111050126.GA41634@stlux503.dsto.defence.gov.au> In-Reply-To: <889823.70463.qm@web120506.mail.ne1.yahoo.com> References: <889823.70463.qm@web120506.mail.ne1.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
0n Wed, Nov 10, 2010 at 04:21:12AM -0800, Kirill Yelizarov wrote:
>All my em cards running 8.1 stable don't reply to icmp echo requests packets larger than 1472 bytes.
>
>On stable 7.2 the same hardware works as expected:
># ping -s 1500 192.168.64.99
>PING 192.168.64.99 (192.168.64.99): 1500 data bytes
>1508 bytes from 192.168.64.99: icmp_seq=0 ttl=63 time=1.249 ms
>1508 bytes from 192.168.64.99: icmp_seq=1 ttl=63 time=1.158 ms
>
>Here is the dump on em interface
>15:06:31.452043 IP 192.168.66.65 > *****: ICMP echo request, id 28729, seq 5, length 1480
>15:06:31.452047 IP 192.168.66.65 > ****: icmp
>15:06:31.452069 IP **** > 192.168.66.65: ICMP echo reply, id 28729, seq 5, length 1480
>15:06:31.452071 IP *** > 192.168.66.65: icmp
>
>Same ping from same source (it's a 8.1 stable with fxp interface) to em card running 8.1 stable
>#pciconf -lv
>em0@pci0:3:4:0: class=0x020000 card=0x10798086 chip=0x10798086 rev=0x03 hdr=0x00
> vendor = 'Intel Corporation'
> device = 'Dual Port Gigabit Ethernet Controller (82546EB)'
> class = network
> subclass = ethernet
>
># ping -s 1472 192.168.64.200
>PING 192.168.64.200 (192.168.64.200): 1472 data bytes
>1480 bytes from 192.168.64.200: icmp_seq=0 ttl=63 time=0.848 ms
>^C
>
># ping -s 1473 192.168.64.200
>PING 192.168.64.200 (192.168.64.200): 1473 data bytes
>^C
>--- 192.168.64.200 ping statistics ---
>4 packets transmitted, 0 packets received, 100.0% packet loss
works fine for me:
FreeBSD 8.1-STABLE #0 r213395
em0@pci0:0:25:0:class=0x020000 card=0x3035103c chip=0x10de8086 rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = 'Intel Gigabit network connection (82567LM-3 )'
class = network
subclass = ethernet
#ping -s 1473 host
PING host(192.168.1.1): 1473 data bytes
1481 bytes from 192.168.1.1: icmp_seq=0 ttl=253 time=31.506 ms
1481 bytes from 192.168.1.1: icmp_seq=1 ttl=253 time=31.493 ms
1481 bytes from 192.168.1.1: icmp_seq=2 ttl=253 time=31.550 ms
^C
-Alex
IMPORTANT: This email remains the property of the Department of Defence and is subject to the jurisdiction of section 70 of the Crimes Act 1914. If you have received this email in error, you are requested to contact the sender and delete the email.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20101111050126.GA41634>