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Address Mgmt/Pool design question?

nmackovski
Level 1
Level 1

This is the error I receive when my configured address pool is in the same network as my private interface.

185 07/08/2003 15:18:35.680 SEV=5 IP/53 RPT=22

IP address conflict on the network: 10.225.251.1

Marking address as unusable.

network: 10.225.250.0/23.

private IP: 10.225.251.251

default gateway: 10.225.251.252

address pool: 10.225.250.100 through 10.225.251.100

If I use another network for the address pool it works (ie. 172.16.16.0). Is it possible to have my address scope on the same network as my private IP address? Please advise.

1 Reply 1

gfullage
Cisco Employee
Cisco Employee

Yes you can do this, but if the concentrator sees any traffic from an internal host that is also in its address pool, it'll do as you're seeing and mark that address as unusable. Check the concentrators ARP table under Monitoring - Statistics - MIB-II Stats - ARP Table to see what internal hosts it knows about.

In your example it has seen some traffic from the host at 10.225.251.1 which is also in it's address pool and has therefore told you that it can't use it.