06-17-2012
Simple answer: no.
Longer answer: The hosts connected to eth1 won't even know it's there, because without an IP it won't send a ARP announce, or react to an ARP request, which is needed to get the destination MAC address. In a switched environment the port it's connected to probably would even be ignored (except maybe for Ethernet broadcasts).
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LEARN ABOUT DEBIAN
tunctl
TUNCTL(8) System Manager's Manual TUNCTL(8)
NAME
tunctl -- create and manage persistent TUN/TAP interfaces
SYNOPSIS
tunctl [-f tun-clone-device] [-u owner] [-t device-name]
tunctl [-f tun-clone-device] -d device-name
DESCRIPTION
This manual page documents briefly the tunctl command.
This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. Instead, it
has documentation in HTML format; see below.
tunctl allows the host sysadmin to preconfigure a TUN/TAP device for use by a particular user. That user may open and use the device, but
may not change any aspects of the host side of the interface.
USAGE
To create an interface for use by a particular user, invoke tunctl without the -d option:
#
tunctl -u someuser
Set 'tap0' persistent and owned by 'someuser'
Then, configure the interface as normal:
#
ifconfig tap0 192.168.0.254 up
#
route add -host 192.168.0.253 dev tap0
#
bash -c 'echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp'
#
arp -Ds 192.168.0.253 eth0 pub
To delete the interface, use the -d option:
#
tunctl -d tap0
Set 'tap0' nonpersistent
SEE ALSO
The UserModeLinux-HOWTO (link to URL http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html)
AUTHOR
tunctl was written by Jeff Dike jdike@karaya.com
This manual page was written by Matt Zimmerman mdz@debian.org for the Debian GNU/Linux system, based on examples from Jeff Dike.
TUNCTL(8)