Package: linux-image-2.6.25-2-iop32x
Version: 2.6.25-7
Severity: normal
Apparently the nic driver for my thecus n2100 has a problem with
multicast packets. It ignores them unless put in promisc or allmulti
mode.
This means that IPV6 doesn't work right by default, since ipv6 relies on
multicast traffic to do neighbor discovery.
For example, I start tcpdump on the n2100, using -p to avoid putting it into
promisc mode:
[EMAIL PROTECTED]:/home/joey>tcpdump -p -n -i eth0
# Here I start ping6 from ::feb2:9663 (box next to the n2100) to
# 2001:4830:1231::1 (the n2100). There are no responses.
^Z
[EMAIL PROTECTED]:/home/joey>ifconfig eth0 allmulti; fg
14:20:01.038563 IP6 2001:4830:1231:0:20c:f1ff:feb2:9663 > ff02::1:ff00:1:
ICMP6, neighbor solicitation, who has 2001:4830:1231::1, length 32
14:20:01.038975 IP6 2001:4830:1231::1 > 2001:4830:1231:0:20c:f1ff:feb2:9663:
ICMP6, neighbor advertisement, tgt is 2001:4830:1231::1, length 32
14:20:01.039295 IP6 2001:4830:1231:0:20c:f1ff:feb2:9663 > 2001:4830:1231::1:
ICMP6, echo request, seq 28, length 64
14:20:01.039602 IP6 2001:4830:1231::1 > 2001:4830:1231:0:20c:f1ff:feb2:9663:
ICMP6, echo reply, seq 28, length 64
14:20:02.038770 IP6 2001:4830:1231:0:20c:f1ff:feb2:9663 > 2001:4830:1231::1:
ICMP6, echo request, seq 29, length 64
14:20:02.039015 IP6 2001:4830:1231::1 > 2001:4830:1231:0:20c:f1ff:feb2:9663:
ICMP6, echo reply, seq 29, length 64
14:20:03.042996 IP6 2001:4830:1231:0:20c:f1ff:feb2:9663 > 2001:4830:1231::1:
ICMP6, echo request, seq 30, length 64
14:20:03.043320 IP6 2001:4830:1231::1 > 2001:4830:1231:0:20c:f1ff:feb2:9663:
ICMP6, echo reply, seq 30, length 64
# Now ping is working.
^C
[EMAIL PROTECTED]:/home/joey>ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:14:fd:30:14:ae
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: 2001:4830:1231::1/64 Scope:Global
inet6 addr: fe80::214:fdff:fe30:14ae/64 Scope:Link
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:10624092 errors:0 dropped:0 overruns:0 frame:0
TX packets:12315556 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2505702674 (2.3 GiB) TX bytes:3802624039 (3.5 GiB)
Interrupt:27 Base address:0xc200
[EMAIL PROTECTED]:~>ifconfig eth0 # machine I was pinging from
eth0 Link encap:Ethernet HWaddr 00:0c:f1:b2:96:63
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: 2001:4830:1231:0:20c:f1ff:feb2:9663/64 Scope:Global
inet6 addr: fe80::20c:f1ff:feb2:9663/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15302416 errors:0 dropped:0 overruns:0 frame:0
TX packets:14007641 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4180405781 (3.8 GiB) TX bytes:1835701985 (1.7 GiB)
Pinging between other machines on the same network (including nslu2, various
intel white boxes etc) works ok, so I don't think it's a problem with my
switch or general network.
Some more details about this problem here:
https://www.sixxs.net/forum/?msg=setup-780039
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: armel (armv5tel)
Kernel: Linux 2.6.25-2-iop32x
Locale: LANG=, LC_CTYPE= (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash
Versions of packages linux-image-2.6.25-2-iop32x depends on:
ii debconf [debconf-2.0] 1.5.23 Debian configuration management sy
ii initramfs-tools [linux-initra 0.92e tools for generating an initramfs
ii module-init-tools 3.4-1 tools for managing Linux kernel mo
linux-image-2.6.25-2-iop32x recommends no packages.
Versions of packages linux-image-2.6.25-2-iop32x suggests:
pn fdutils <none> (no description available)
pn linux-doc-2.6.25 <none> (no description available)
-- debconf information excluded
--
see shy jo
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