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Date:      Tue, 22 Nov 2011 23:11:15 +0100
From:      Kees Jan Koster <kjkoster@gmail.com>
To:        Michael Sierchio <kudzu@tenebras.com>
Cc:        Gary Gatten <Ggatten@waddell.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: Diagnosing packet loss
Message-ID:  <763864D4-CC19-4473-AFAF-D22EF94E08A2@gmail.com>
In-Reply-To: <CAHu1Y70JMTDfCE6awUvxqq6YWStNcLt8S-HB-5N+o3ggTHQFpw@mail.gmail.com>
References:  <2973_1321996526_4ECC10EE_2973_123_1_D9B37353831173459FDAA836D3B43499D2C69D77@WADPMBXV0.waddell.com> <4B28ADC5-8325-442E-8F02-9AE3535D8C6D@gmail.com> <CAHu1Y70JMTDfCE6awUvxqq6YWStNcLt8S-HB-5N+o3ggTHQFpw@mail.gmail.com>

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Dear Michael,

[kjkoster@saffron ~]$ ifconfig bge0
bge0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu =
1500
	=
options=3D8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTAT=
E>
	ether 00:e0:81:32:ed:b4
	inet 91.196.169.165 netmask 0xfffffff8 broadcast 91.196.169.167
	inet 91.196.169.166 netmask 0xffffffff broadcast 91.196.169.166
	media: Ethernet autoselect (100baseTX =
<full-duplex,flowcontrol,rxpause,txpause>)
	status: active
[kjkoster@saffron ~]$ fgrep bge0 /etc/rc.conf=20
ifconfig_bge0=3D"inet 91.196.169.165 netmask 255.255.255.248"
ifconfig_bge0_alias0=3D"91.196.169.166 netmask 255.255.255.255"

That broadcast address and netmask look wrong for sure.

Should I just change that to 255.255.255.248 as well?

Kees Jan


On 22 Nov 2011, at 23:00, Michael Sierchio wrote:

> On Tue, Nov 22, 2011 at 1:58 PM, Kees Jan Koster <kjkoster@gmail.com> =
wrote:
>=20
>> Thank you for your reply. Your comment about dupe IP triggered =
something that I failed to mention: the interface is aliased. It has two =
IP addresses. IP address a and it has an alias IP address b. I just =
tested binding mtr to each of these interfaces separately to measure =
packet loss.
>=20
> Show us the ifconfig output.  My guess is that the alias is
> incorrectly configured.


--
Kees Jan

http://java-monitor.com/
kjkoster@kjkoster.org
+31651838192

I hate unit tests; I much prefer the illusion that there are no errors =
in my code.
                                                                 -- =
Hendrik Muller




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