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pekr
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Two different network masks on two opposite interfaces?

Wed Mar 29, 2006 10:12 am

Hi,

I would like to ask - in MT documentation (http://www.mikrotik.com/docs/ros/2.9/ip/address - in ARP section), there is an example, where two opposite interfaces on "one" network, are having different network mask, e.g.

192.168.0.20/24 ------ 192.168.0.1/25

I can understand the example given, from the ARP and proxy-ARP pov, but what about TCP broadcasts, which are being sent on the last IP in the given range, which of course, is different for /24 and /25? How will router behave?

Thanks a lot,
-pekr-
 
sten
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Re: Two different network masks on two opposite interfaces?

Wed Mar 29, 2006 10:25 pm

I can understand the example given, from the ARP and proxy-ARP pov, but what about TCP broadcasts, which are being sent on the last IP in the given range, which of course, is different for /24 and /25? How will router behave?
There is no such thing as "TCP broadcast", TCP/IP is one of very few protocols (that i know of) that can't be broadcasted.
Broadcasts are not forwarded automatically. That's also the point.
Move along. Nothing to see here.

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