[LARTC] iproute2 ping question

[lartc user <lartc@theorb.net>]

Hi List,

New subscriber/lartc user here.  Have read the entire lar&tc howto, 
alexy's ip_cref, etc. and must say, this makes iptables seem downright 
*easy*.

I'm trying to build a three-legged linux router (WAN/LAN/DMZ) and have 
had it more or less working with iptables but would like to learn layer2 
routing with iproute2.

I have an adsl/29 network and would like my router to answer on all five 
of my static addresses on the WAN side of the router.  For testing 
purposes I'm using tcpdump and ping.

For list purposes the WAN is
$ADSL.0  network
$ADSL.1  gateway
$ADSL.2  WAN-address1 (eth1)
$ADSL.3  WAN-address2
$ADSL.4  WAN-address3
$ADSL.5  WAN-address4
$ADSL.6  WAN-address5
$ADSL.7  broadcast

First I bring up the nic.
   "ifup eth1"
Ping and eth1 ($ADSL.2) replies correctly.

Next I add a second address to the nic.
   "ip addr add $ADSL.3/29 dev eth1"

Ping gets no response from the new address but tcpdump shows the nic 
receiving the request.

If instead I bring the addresses up as aliases on eth1 the pings work.

Would somebody please explain how to use ip to attach the addresses to 
that interface and have it respond to them?

Many thanks in advance, and apologies for the thickness of my skull.

:m)
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