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.

cgm
New Member

Transparent MAC discovery ?

Hi,

docs say that PIX/ASA sends a ping to discover destination MAC address. I can not find a reason for doing that... anyone can help ?

2 REPLIES
Cisco Employee

Re: Transparent MAC discovery ?

which doc?

cgm
New Member

Re: Transparent MAC discovery ?

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a008089f467.shtml

The security appliance records that a session is established. If the destination MAC address is in its table, the security appliance forwards the packet out of the outside interface. The destination MAC address is that of the upstream router, 192.168.1.2. If the destination MAC address is not in the security appliance table, the security appliance attempts to discover the MAC address when it sends an ARP request and a ping. The first packet is dropped.

123
Views
0
Helpful
2
Replies