10-02-2008 10:42 AM - edited 03-03-2019 11:46 PM
This is our current configuration for our dhcp server/router.
ip dhcp pool ncore-pool
network 192.168.134.0 255.255.254.0
default-router 192.168.134.1
As you can see we are using a .254 subnet mask
However, one host was getting
192.168.134.255 as an assigned IP address.
Being that we are using a /23 mask. Wouldnt the host still be able to connect
to our network, as .255 is no longer
the broadcast address of the subnet?
she was unable to until i excluded
192.168.134.255 from the dhcp and
she was given another ip address
Solved! Go to Solution.
10-02-2008 11:13 AM
Richard
From the perspective of the Cisco router using 192.168.134.0 with a /23 mask if legitimate and the user should have been able to connect and to access resources. But there are some devices (some OSes - and I think that it includes at least some versions of Windows) that see 192.168.x.x and automatically treat it as a /24 and do not recognize the supernet that you are attempting to use.
HTH
Rick
10-02-2008 10:52 AM
Hello Richard,
for network 192.168.134.0 255.255.254.0
the IP directed broadcast is:
192.168.135.255
/23 the ip directed broadcast address is the one with all 1 in the host portion
some other device was treating this address as an IP directed broadcast check on all devices in the path
What routing protocol are you using ?
Hope to help
Giuseppe
10-02-2008 11:13 AM
Richard
From the perspective of the Cisco router using 192.168.134.0 with a /23 mask if legitimate and the user should have been able to connect and to access resources. But there are some devices (some OSes - and I think that it includes at least some versions of Windows) that see 192.168.x.x and automatically treat it as a /24 and do not recognize the supernet that you are attempting to use.
HTH
Rick
10-02-2008 04:14 PM
thx!
10-03-2008 03:27 AM
Richard
I am glad that my response helped to resolve your question. Thank you for using the rating system to indicate that your question was resolved (and thanks for the rating). It makes the forum more useful when people can read a question and can know that there was a response that did resolve the question.
The forum is an excellent place to learn about Cisco networking. I encourage you to continue your participation in the forum.
HTH
Rick
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