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Hello, a couple of questions...
We are running a dual lvs-NAT setup (2x dual 733
dell systems with 1gb ram)
Each machine has 2 active nics one with our
216.177.xxx.xxx (public network side) and the other with 192.168.xxx.xxx
(private network)
Redhat 9 install with modified kernel. (uname
-r > 2.4.20-18.7.hidd.ipvs109.cipe154smp)
ipvsadm --version > ipvsadm v1.21 2002/11/12 (compiled with popt and IPVS
v1.0.9)
We are running heartbeat+mon for failover between
directors.
Our haresources file currently houses 144 IP
addresses.
We are also running ospf and zebra on the
directors.
During our early testing and early production our
failover was virtually unnoticable. Since we have added ospf and zebra as
well as the majority of those entries in our haresources file our failover time
has hit somewhere around +/-10 minutes. Can anybody tell me if that would
be normal for the ammount of resources we are failing over or if it hints to a
possible problem? We have been able to cut this time a little shorter by
clearing the arp cache on our routers but do not know if the problem is actually
arp or not. Is there an easy way to tell if the grat. arp is
working? Also we noticed something that seemed quite strange, on the
virtual interfaces (eth0:##) after about eth0:42 it begins skiping every other
interface number (eth0:42,eth0:44,eth0:46...) and then sometime later changes to
the odd number interfaces and skips the evens. So with 144 ips we end up
with the last number in our eth0 series being eth0:237, and sometimes during a
failover a few of the interfaces are not correctly brought down from the failing
lvs node... In addition to this we have found that a few (3 or
4) of the virtual interfaces with real-world IPs are responding to arp
requests. The only place on our network where these addresses exist is
inside of the Load Balancers. It is my understanding that virtual
interfaces should not respond to arp requests. Any insight or help you
could provide would be greatly appreciated. I can provide any information
you might need to assist you in helping us out.
Thank You
Billy Olson
Systems Administrator
ReachONE Internet, Inc.
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