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| 08 Sep 2012 | #1 |
| | Why are the pre-set static ARP entries? When viewing my arp table ('arp -a'). There are all the computers on my lan. But there are also a few static entries. I attached a screen shot of it. Why are there arp table entries for 224.0.0.22, 224.0.0.251, etc. and what are they for? |
My System Specs | |
| 08 Sep 2012 | #2 |
| | The 224 addresses are multicast addresses - packets sent to those address will be received my multiple hosts (or routers). 224.0.0.22 is the IGMP (Internet group Management protocol). 224.0.0.2 for instance is all routers broadcast. 224.0.0.250-255 are unassigned and I think are used on the local network for some windows services multicasting (e.g. http://en.wikipedia.org/wiki/Link-lo...ame_Resolution ) http://www.nblug.org/firewall/intern...cast-addresses EDIT: I guess I should add that your computer is listening on 224.0.0.252 for multicast packets on that address. That is why it is static. Last edited by GeneO; 08 Sep 2012 at 10:38 PM.. |
| My System Specs |
| 09 Sep 2012 | #3 |
| | Thanks! |
| My System Specs |
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Why are the pre-set static ARP entries? problems?
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