How does ARP work on WAN port and on IP alias
I have 10 public ip addresses and I have only 1 WAN port . So I have created aliases on the WAN port of the firewall . Then I have forwarded the ports of all the public ips to internal machines . The questions I have
1. Will the alias broadcast mac address ?
2.Will the WAN interface broadcast mac address ?
3. How will the upstream device will know which IP has which mac ?
4. What is the use of proxy arp in this scenario ?
5. Does gratuitous arp play any role here .?
Here is the setup
ISP link Fibre Connection >ISP device >Switch >Firewall >LAN computers
Please let me know the arp flow over the wan and the working of IP alias .
Hi,
APs on a different subnet then you have to
1. configure DHCP option 43 on the APs subnet
2. put in a DNS entry for CISCO-LWAPP-CONTROLLER.localdomain.
3. Use IP helper address on the Router
Check step 4,5& 6 in Layer 3 LWAPP WLC Discovery Algorithm:
http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/70333-lap-registration.html
Hope this helps you to understand.
Regards
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