Is it possible to see the ip addresses of PCs that are connected to a switch that is doing layer 2.e.g a catalyst 2950 switch as you can see when you do "show ip arp or show arp " on a layer 3 switch or router ?
Unfortunately no. Since the default gateway for the connected hosts will be on another switch or router, the 2950 will only maintain a mac-address-table of connected hosts.
If the management IP is in the same VLAN as the clients, if you know the range of IPs, you can ping them from the switch to generate an ARP, and then cross reference the ARP entries with the mac-address-table, but this is extremely cumbersome, if even possible.
Your best bet is to get the IP to MAC pairings from the default gateway, and check that against the MAC table on the 2950.
[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...