Cisco Cisco IOS Software Release 12.3(4)T

ICMP ping can be used in all types of deployments. Refer to the ssg auto-logoff icmp command 
reference page for more information about SSG autologoff using ICMP ping.

ARP ping will work only on hosts that have a MAC address. ARP ping will not work for PPP users 
because they do not have a MAC table entry.

ARP ping does not support overlapping IP addresses.

SSG autologoff that uses the ARP ping mechanism will not work for hosts with static ARP entries.

You can use only one method of SSG autologoff at a time: ARP ping or ICMP ping. If you configure 
SSG to use ARP ping after ICMP ping has been configured, the ICMP ping function will become 
disabled.

The following example shows how to enable SSG autologoff and to configure SSG to use ARP ping to 
detect connectivity to hosts:

ssg auto-logoff arp interval 60

The following example shows how to enable SSG MAC address checking for autologoff:

ssg auto-logoff arp match-mac-address

The following example shows how to enable SSG MAC address checking for autologoff and to specify 
an ARP ping interval of 60 seconds:

ssg auto-logoff arp match-mac-address interval 60

Copyright © 2003 Cisco Systems, Inc. All rights reserved.

Configures the SSG to automatically log off hosts that have lost 
connectivity with SSG and to use the ICMP ping mechanism to detect 
connectivity.

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