Hello,
I have a Debian Lenny box with two NICs, eth0 and eth1. eht1 is a
trunking interface and can be put onto any VLAN. Whenever eth1 is put
onto a VLAN, I want it to get an address from DHCP but I do *not* want
it to set a default gateway.
I set up a definition for each interface in dhclient.conf and explicitly
requested everything except "routers". Here's an example using the
interface for VLAN 52:
interface "vlan52" {
request subnet-mask, broadcast-address, time-offset, domain-name,
domain-name-servers, host-name;
}
I deleted everything else from the config file, so it's literally just
one big list of interface definitions like the one above. I also set up
two shell scripts per VLAN, one to set up a static route and the other
to delete the route, and set these scripts to run as post-up/pre-down
commands for the respective VLAN interface in /etc/network/interfaces,
like so:
# VLAN 52 - Library
iface vlan52 inet dhcp
vlan_raw_device eth1
post-up /etc/network/scripts/vlan52_add_route
pre-down /etc/network/scripts/vlan52_del_route
The scripts work and I get the static route, but I still get a default
route as well:
# ifup vlan52
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 52 to IF -:eth1:-
Internet Systems Consortium DHCP Client V3.1.2
Copyright 2004-2008 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Listening on LPF/vlan52/00:0d:56:f0:33:5c
Sending on LPF/vlan52/00:0d:56:f0:33:5c
Sending on Socket/fallback
DHCPDISCOVER on vlan52 to 255.255.255.255 port 67 interval 5
DHCPOFFER of 10.5.2.176 from 10.5.2.1
DHCPREQUEST of 10.5.2.176 on vlan52 to 255.255.255.255 port 67
DHCPACK of 10.5.2.176 from 10.5.2.1
bound to 10.5.2.176 -- renewal in 107356 seconds.
# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
10.5.2.0 10.5.2.1 255.255.255.0 UG 0 0 0
vlan52 <-- STATIC ROUTE SET BY THE POST-UP SCRIPT
10.5.2.0 0.0.0.0 255.255.255.0 U 0 0 0
vlan52 <-- DEFAULT ROUTE ADDED BY DHCP!
10.3.0.0 0.0.0.0 255.255.248.0 U 0 0 0
eth0
0.0.0.0 10.3.1.1 0.0.0.0 UG 0 0 0
eth0
Any help would be greatly appreciated.
Thanks!
Dave
--
Dave Parker
Systems Administrator
Utica College
Integrated Information Technology Services
(315) 792-3229
Registered Linux User #408177
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