06-30-2003 08:37 PM - edited 03-02-2019 08:32 AM
we are using a router 3640.
How i can close IP to a specific MAC Address on router that can't take that IP address?
using ip arp command didn't help. please learn me others.
thanks
06-30-2003 11:52 PM
First.
Are you using DHCP???
If you are (i hope you are) and you want to prevent dhcp clients to take some IP's (servers in this case) you should use the 'ip dhcp excluded-address' command in this way:
ip dhcp excluded-address "first ip lastip"
You cannot create manual arp bindings since arp is a pure dynamic service
07-03-2003 08:35 AM
arp 1.2.3.4 0000.1111.2222 arpa will set a static arp entry on the router.
There was a bug in older IOS releases which allowed gratious arp to override the static arp entries (something before 12.0(7)T ).
What IOS release are you running ?
The static arp entry will not help for clients in the same vlan as the server trying to access the local server, as the client could get the arp response from the misconfigured client. Put the servers in their own VLAN. If the performance of the 3640 is not enough use a L3 or MLS capable switch.
Regards Michel
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide