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Date: Sun, 26 Jan 1997 17:53:27 -0500 (EST)
From: Dev Chanchani <dev@trifecta.com>
To: Richard Gresek <rg@gds.de>
cc: freebsd-isp@freebsd.org
Subject: Re: Ping DUP
In-Reply-To: <199701231229.NAA20550@gds.de>
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I would start by getting rid of the route entry :-)

On Thu, 23 Jan 1997, Richard Gresek wrote:

> Hallo,
> 
> I am using the 3.0-970118-SNAP on a P5 200 MHz and a 3Com 3C900 
> Etherlink XL NIC.
> 
> I defined several IP-addresses with 
> 
> ifconfig vx0 inet 194.231.79.60 netmask 0xffffffc0 alias
> route add 194.231.79.60 localhost
> 
> Now, when I ping this address from another network every ip-packet 
> get duplicated:
> 
> PING 194.231.79.60 (194.231.79.60): 56 data bytes
> 64 bytes from 194.231.79.60: icmp_seq=0 ttl=251 time=59.921 ms
> 64 bytes from 194.231.79.60: icmp_seq=0 ttl=251 time=69.929 ms (DUP!)
> 64 bytes from 194.231.79.60: icmp_seq=1 ttl=251 time=60.104 ms 
> 64 bytes from 194.231.79.60: icmp_seq=1 ttl=251 time=70.113 ms (DUP!) 
> 64 bytes from 194.231.79.60: icmp_seq=2 ttl=251 time=60.108 ms 
> 64 bytes from 194.231.79.60: icmp_seq=2 ttl=251 time=70.071 ms (DUP!) 
> 64 bytes from 194.231.79.60: icmp_seq=3 ttl=251 time=50.142 ms 
> 64 bytes from 194.231.79.60: icmp_seq=3 ttl=251 time=60.133 ms (DUP!) 
> ^C ---
> 194.231.79.60 ping statistics --- 4 packets transmitted, 4 packets
> received, +4 duplicates, 0% packet loss round-trip min/avg/max =
> 50.142/62.565/70.113 ms #
> 
> There are no DUPs when pinging from within the same net.
> 
> I did not have this problem with FreeBSD 2.1.5 nor with 3.0 and a 
> NE2000 clone.
> 
> Could it be a bug in the vx0 driver or did I misconfigure something?
> 
> Thanks
> 
> Richard
> 
> 
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