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Webcast-Catalyst9k
New Member

IP addressing

I have have a question:

10.91.11.x 255.255.255.0

If i ping the Ip address of 10.91.11.255 and the subnet is on the other side of a a router, i receive a reply. I can also traceroute to it. Is this not a broadcast address to this subnet, so shouldn't the router stop it?

Thanks in advance. =)

2 REPLIES
Bronze

Re: IP addressing

It depends on the subnet mask you are using. The 10.0.0.0 network is a class A address, therefore the default subnet mask is 255.0.0.0 so the 10.91.11.255 is not a broadcast address, 10.255.255.255 is.

Cisco Employee

Re: IP addressing

I also want to add that you can ping broadcast addresses.

To prevent the router to forward traffic to a broadcast address, use the interface command "no ip directed-broadcast"

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