-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Scott Silva Sent: Wednesday, January 30, 2008 12:30 To: centos@centos.org Subject: [CentOS] Re: Network routes
on 1/29/2008 5:24 PM Jason Pyeron spake the following:
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Les Mikesell Sent: Tuesday, January 29, 2008 18:25 To: CentOS mailing list Subject: Re: [CentOS] Network routes
You probably want to remove the default route through
NE.TW.KB.1 and add
routes for the specific networks that you can reach though it. Normally routing is done toward a destination network/address
without
regard to the route of a packet you might be replying to.
As for an
'outage', how do you define/detect the outage? Normally
if you want
routes to be
determined dynamically you would set up a routing protocol
with the
next-hop routers - or for simple failover the alternative gateway routers might be configured via hsrp or vrrp to have a floating IP address that the rest of the LAN uses as the default
gateway address.
Droping the failover requirements, pings still do not
respond off the local
subnet.
[root@host20 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags
Metric Ref Use
Iface NET.WOR.KA.0 0.0.0.0 255.255.255.0 U 0
0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 0
0 0 eth0
NE.TW.RKB.0 0.0.0.0 255.255.255.0 U 0
0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0
0 0 eth1
0.0.0.0 NET.WOR.KA.1 0.0.0.0 UG 0
0 0 eth1
But none of the destinations have a gateway address. So all of the traffic is trying to go from every interface to the default gateway. Do both interfaces go out the same router? As an example in my system, I have a local interface and a wan interface. Only the wan interface needs to use the default route, as it is the only interface that talks to the outside world. But my internal interface has routes to other private networks through IPSec tunnels on other routers.
So the internal interface has multiple routes and each has a gateway address of the router that handles that route.
Are your network-a and network-b addresses actually public addresses or rfc-1918 private addresses?
Public.
BTW thank you all for the help so far.
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