Date: Tue, 27 Jun 2000 19:20:46 -0400 From: Brian Reichert <reichert@numachi.com> To: freebsd-net@freebsd.org Subject: Did IP aliasing change after 2.x? Message-ID: <20000627192045.J1800@numachi.com>
next in thread | raw e-mail | index | archive | help
I must be missing something, so please bear with me.
I have two servers running.
198.175.254.7 is running 2.2.7-RELEASE.
198.175.254.4 is running 4.0-RELEASE.
In each case, the IP is an alias on the NIC.
From within my net, I can ping each of these name servers. From
outside of my net, I can only ping 198.175.254.7, the 'old' box.
I can get to their primary IP addresses just fine.
There is no packet filtering at play here.
On each of the newer box, when I dump ping traffic with
tcpdump:
# tcpdump -n host 198.175.254.4
tcpdump: listening on dc0
19:05:21.437187 208.176.83.163 > 198.175.254.4: icmp: echo request
19:05:22.434743 208.176.83.163 > 198.175.254.4: icmp: echo request
19:05:23.431832 208.176.83.163 > 198.175.254.4: icmp: echo request
That network segment is getting packets destined for 198.175.254.4,
but the card never generates the 'echo reply' packets.
The 2.2.7-RELEASE box:
# ifconfig ed1
ed1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 198.175.254.2 netmask 0xffffff00 broadcast 198.175.254.255
inet 198.175.254.7 netmask 0xffffffff broadcast 198.175.254.7
ether 00:40:05:4c:5c:e0
The 4.0-RELEASE box:
# ifconfig dc0
dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 198.175.254.6 netmask 0xffffff00 broadcast 198.175.254.255
inet6 fe80::220:78ff:fee1:4ae1%dc0 prefixlen 64 scopeid 0x1
inet 198.175.254.4 netmask 0xffffffff broadcast 198.175.254.4
ether 00:20:78:e1:4a:e1
media: autoselect (10baseT/UTP) status: active
supported media: autoselect 100baseTX <full-duplex> 100baseTX
10baseT/UTP <full-duplex> 10baseT/UTP 100baseTX <hw-loopback> none
The mailing list archives mentioned affixing the alias to lo0,
rather than the NIC; I tried that, to no effect. There was nothing
on the errata page.
Any ideas on why I might be seeing different results here?
--
Brian 'you Bastard' Reichert reichert@numachi.com
37 Crystal Ave. #303 Daytime number: (603) 434-6842
Derry NH 03038-1713 USA Intel architecture: the left-hand path
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20000627192045.J1800>