[c-nsp] CEF Load Sharing question
Drew Weaver
drew.weaver at thenap.com
Wed Jan 28 16:06:13 EST 2009
I have a 3560-48TS which is connected via gig-e to 3 switches(routers).
On the 3560:
G0/1, g0/2, and g0/3 are part of VLAN 2
interface Vlan2
ip address x.x.x.4 255.255.255.248
end
Ip route 0.0.0.0 0.0.0.0 Vlan2 x.x.x.1 track 1
Ip route 0.0.0.0 0.0.0.0 Vlan2 x.x.x.2 track 2
Ip route 0.0.0.0 0.0.0.0 Vlan2 x.x.x.3 track 3
Routing entry for 0.0.0.0/0, supernet
Known via "static", distance 1, metric 0, candidate default path
Routing Descriptor Blocks:
x.x.x.3, via Vlan2
Route metric is 0, traffic share count is 1
* x.x.x.2, via Vlan2
Route metric is 0, traffic share count is 1
x.x.x.1, via Vlan2
Route metric is 0, traffic share count is 1
On VLAN 3 (x.x.x.129) I have two servers, one is a Windows 2003 server, and one is a Redhat 5 server (the 3560 is the gateway for these two servers).
I know this is kind of nit-picky, but when I run a traceroute from the Linux server it looks like total * city:
[~]# traceroute x.x.x.1
traceroute to x.x.x.1 (x.x.x.1), 30 hops max, 40 byte packets
1 x.x.x.129 (x.x.x.129) 2.476 ms 2.662 ms 2.882 ms
2 x.x.x.1 (x.x.x.1) 0.744 ms * *
If I trace route past the routers to the internet there are many more dozens of *** along the way.
The windows 2003 server never shows any * * * during trace routes so I am assuming this has something to do with the way linux is doing the trace route?
Is there a better way to do load sharing between l3 devices?
Thanks,
-Drew
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