Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

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 . 

 

 

 

206
Views
0
Helpful
0
Replies
CreatePlease login to create content