Date: Wed, 10 Nov 2010 04:21:12 -0800 (PST) From: Kirill Yelizarov <ykirill@yahoo.com> To: freebsd-stable@freebsd.org Subject: icmp packets on em larger than 1472 Message-ID: <889823.70463.qm@web120506.mail.ne1.yahoo.com>
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Hi,
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
And here is it's dump on em card
5:11:15.191496 IP 192.168.66.65 > *****: ICMP echo request, id 33593, seq 0, length 1480
15:11:15.191534 IP 192.168.66.65 > *****: icmp
15:11:16.192119 IP 192.168.66.65 > *****: ICMP echo request, id 33593, seq 1, length 1480
15:11:16.192156 IP 192.168.66.65 > ******: icmp
igb cards on 8.1 stable are not affected
Regards,
Kirill
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