ARP cache entry for router
ARP cache entry for router
- Subject: ARP cache entry for router
- From: Ryan McGann <email@hidden>
- Date: Wed, 05 Nov 2003 18:44:03 -0800
Short question: When we receive a notification from SystemConfiguration that the default route has changed, I want to get the link layer information for the router if applicable. From what I can tell, an ARP entry always exists for the router, and I'm assuming it's added by the kernel when the route is added. But can there be a case when this will not be true? In other words, should I go to the trouble of crafting an ARP packet and waiting for the reply, or is it a "99% safe" assumption that the ARP entry will exist (assuming the router information is correct in the user's settings)?
Also, is this the same for IPv6?
Thanks,
Ryan
-----------------------
Ryan McGann
email@hidden
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