Yes, and also if the router ever receives an ARP packet that tries to
overwrite the IP owned by the router it will send a gratuitous arp.
This was in response to:
http://www.cisco.com/warp/public/707/IOS-arp-overwrite-vuln-pub.shtml
hth
Priscilla Oppenheimer wrote:
> =?iso-8859-1?q?Gerard=20Torin?= wrote:
>
>>Hi Guys, anybody know how I`ll see if gratuitous-arps is enable
>>on the Cisco Routers?
>
>
> Cisco routers do use gratuitous ARP and I don't think it's configurable, so
> you won't see it in the configuration file. If you want to see it in
action,
> use a sniffer while a router is booting. You'll see something like the
> following from one of my routers:
>
> Ethernet Header
> Destination: FF:FF:FF:FF:FF:FF Ethernet Broadcast
> Source: 00:00:0C:3F:00:D4
> Protocol Type: 0x0806 IP ARP
> ARP - Address Resolution Protocol
> Hardware: 1 Ethernet (10Mb)
> Protocol: 0x0800 IP
> Hardware Address Length:6
> Protocol Address Length:4
> Operation: 2 ARP Response
> Sender Hardware Address:00:00:0C:3F:00:D4
> Sender Internet Address:172.16.10.1
> Target Hardware Address:FF:FF:FF:FF:FF:FF Ethernet Broadcast
> Target Internet Address:172.16.10.1
> Extra bytes
> Number of bytes:
> ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> .. 00 00
> FCS - Frame Check Sequence
> FCS (Calculated): 0xE7459D04
>
> Priscilla
>
>
>
>>
>>Thanks for you help!!!!
>>
>>
>>---------------------------------
>>Yahoo! Sorteos
>>!Ya puedes comprar Loterma de Navidad!
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