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RE: Broadcast Address for VIP (lo:0)...

To: "Sean Rolinson" <snowdog@xxxxxxxxxxxxx>, <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: Broadcast Address for VIP (lo:0)...
From: "Farrell, Doug" <DFarrell@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 10 Aug 2004 15:20:42 -0400
Sean,

I'd be very interested in how you got LVS/DR on RH 3.0 ES running, like maybe 
seeing your configuration file. Did you use the RedHat Piranha software or used 
the LVS software directly?

Thanks,
Doug


-----Original Message-----
From: Sean Rolinson [mailto:snowdog@xxxxxxxxxxxxx]
Sent: Tuesday, August 10, 2004 3:12 PM
To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Broadcast Address for VIP (lo:0)...


Hello Group,

I've setup LVS/DR on RH 3.0 ES.  Everything with regards to LVS is working fine 
and has been for sometime.  However, we ran in to some problems today deploying 
a package called Spread (http://www.spread.org).

I tracked the problem down to the fact that I had setup the lo:0 inteface with 
a broadcast address.  The Spread package uses the broadcast address of the 
network to send out packets.

Pinging the broadcast address of the network from any of the LVS Real Servers 
only returned the VIP address, which makes sense since the netmask for lo:0 
(VIP) was 255.255.255.255.

After removing the broadcast entry from my 
/etc/sysconfig/network-scripts/ifcfg-lo:0 entry, everything "seems" to work 
fine.

My question to the group: Is it ok to not to have a broadcast entry in for 
lo:0?  Does LVS need to have a broadcast set for it to work properly?

Thanks...

Sean

/etc/sysconfig/network-scripts/ifcfg-lo:0 (now)

# LVS (UltraMonkey)
DEVICE=lo:0
IPADDR=192.168.10.20
NETMASK=255.255.255.255
NETWORK=192.168.10.0
# BROADCAST=192.168.10.255
ONBOOT=yes
NAME=loopback

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