Eric, The gratuitous ARP is just to let the switch or bridge know that the port that the virtual MAC is attached to has changed.
If an existing router is converted to HSRP, then the end stations will continue to track the real MAC address, not the virtual one. You have to reboot the end stations or otherwise clear their ARP caches to get them to use the virtual MAC. Help any? Karen *********** REPLY SEPARATOR *********** On 3/18/2003 at 6:24 AM ericbrouwers wrote: >Hello all, > >I've read in the CCNP Switching Exam Cert. Guide that a standby router that >becomes active in an HSRP group, sends a gratuitous ARP to update the ARP >cache of the end stations with the new active MAC address... > >This is strange, since the same virtual MAC address is used by active and >standby HSRP routers. > >However, maybe Cisco's implementation has once been like this, because I've >seen instances in the field that ARP caches contained the real MAC instead >of >the virtual MAC address when using HSRP. > >Can someone give comments on this? > >Thanks, > >Eric Brouwers >[EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65699&t=65633 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
