I've been testing out VRRP and it seems to work pretty well if you want
to fail over from one machine to another on a single interface. But
what I would really like to be able to do is duplicate my MT routers
against equipment failure rather than network failure.
Example:
CPE ---- AP ---+------MT1----- + ----- WORLD
| |
+------MT2 ----- +
MT1 and MT2 are both routing between AP and the world.
AP is 172.16.2.0/24
WORLD is 10.0.0.0/24
MT1 has
Internal (AP) address of 172.16.2.1
External (WORLD) address of 10.0.0.1
vrrp1 (AP) address of 172.16.2.254
vrrp2 (WORLD) address of 10.0.0.254
MT2 has:
Internal (AP) address of 172.16.2.2
External (WORLD) address of 10.0.0.2
vrrp1 (AP) address of 172.16.2.254
vrrp2 (WORLD) address of 10.0.0.254
172.16.2.0/24 is routed to 10.0.0.254
172.16.2.0 side has a default gateway of 172.16.2.254
When the AP side of MT1 is unplugged MT2 takes over and only a couple
of pings are dropped. However if the WORLD side of MT1 is unplugged
about 4 pings time out and then I start getting destination unreachable.
The VRRP failover works on both sides. If the WORLD side of MT1 is
unplugged I can ping 10.0.0.254 and get a response from MT2. But on the
internal end of things MT1 is still 172.16.2.254 so I get the host
unreachable message.
So what I'm really looking for is high availability for the router and I
was hoping that VRRP would do the trick. I thought about bridging but
at NOC I have several networks that all connect to my main MT router and
I really don't want to bridge the traffic.
If anyone has a clue, or can definitively say it can't be done with VRRP
I would greatly appreciate the help.
--
Sam Tetherow
Sandhills Wireless
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