flq06
join:2009-08-06
Verdun, QC | reply to sk1939
Re: Cisco switch into non-cisco switch, unknown initial lag layer 2 (only) switches doesn't keep any ARP info. Most likely, you don't have enough host to respond to your ARP request, or your router itself won't reply.
You could also create a static arp entry for your camera. |
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cramer
join:2007-04-10
Raleigh, NC
kudos:7 | said by flq06:layer 2 (only) switches doesn't keep any ARP info. Yes they do; you just cannot see it on an unmanaged switch. Unless it's flooding every packet to every port all the time (which would make it a HUB), it does have tables of MAC's known to be on each port. |
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flq06
join:2009-08-06
Verdun, QC | Of course, basic layer 2 mechanism. I was talking about ARP. Only a layer 3 switch, router, host know about ARP bindings. |
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aryobaPremium,MVM
join:2002-08-22
kudos:3 | reply to cramer
said by cramer:said by flq06:layer 2 (only) switches doesn't keep any ARP info. Yes they do; you just cannot see it on an unmanaged switch. Layer-2 switch has no knowledge of IP address or anything concerning Layer-3 and up since Layer-2 switch deals with only MAC addresses. Therefore Layer-2 switch maintains CAM or MAC address table which correlate between MAC address and certain switch port. ARP Table keeps correlation between IP address and MAC address which typically Layer-3 capable devices maintain such as Layer-3 switch and router.
An exception is IGMP snooping feature where Layer-2 switch is capable to snoop Layer-3 info of Multicast group in order to associate the Multicast MAC address (as a result of the Multicast group translation from Layer-3 IP address to Layer-2 MAC address) with certain switch ports where the Multicast subscribers connect.
said by cramer:Unless it's flooding every packet to every port all the time (which would make it a HUB), it does have tables of MAC's known to be on each port.
Layer-2 switches typically do not flood packets, however they flood frames since the switches only talk Layer-2. |
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