I'm curious to find out what goes on as far as communications between a local host and a router is concerned when the arp cache of a router has two instances of the same MAC address but different IP address.
I think communication will be fine as long as both IP addresses are on the same system.
I have come across this kind of scenario on SUN platform using a Quad Card, which could use same MAC address for all 4 interfaces. OR 2 IP addresses binded to single physical interface. In my understanding, for packet destined to either IP address, router will forward the packets with destination MAC address of 0001.64ff.ce99.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...