- Depends
on your config. If your 2 WAN links are of equal cost then your total
bandwidth is the sum of the 2 links. If its not equal, usually traffic
goes to the bigger bandwidth. You can also configure the router to load
balanced even on unequal cost WAN links. Setup MRTG so you can monitor the
traffic for your router interfaces.
- Your
Ethernet interface will still be up and will not detect that it lost a
connection (assuming a connection problem somewhere your ISP) since its
cable is connected to both ends and all working. It should automatically
route all traffic to the working interface. Done this before but I lost my
config regarding this one. And if your doing it manually im afraid some
data are dropped.
HTH
From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 11, 2005
7:33 PM
To: [email protected]
Subject: [plug] Linux high
availability routing
I have read http://lartc.org/howto/lartc.rpdb.multiple-links.html
and i'm wondering...
1. What is the effect of a load balanced router
on the LAN's total throughput? If you have 2 WAN links, each with a
CIR
of X kbps, do you get a total CIR of 2X kbps or just X kbps?
2. What is the uptime/downtime notification
scheme of an ethernet interface? If you have 2 ethernet WAN interfaces
configured
with the same weight and you have an X amount of data to be routed, each
interface/gateway/ISP will handle
approximately X/2 data amounts. Normally, we
test the redundancy of these setups by unplugging the physical links.
Consider this scenario; Everything is good up
to the WAN gateway and the problem is somewhere b w/in the ISP's core network.
Our router has no way of knowing that the link is already down.
Asssuming that this scenario happens, X/2 of my
data is being dropped?
Joseph
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