Seems like either the switch contain the corrupted image or the invalid bootvariable..
You need to break into ROMMON by sendintg the break signal..and try to do xmodem..
Here is the note abut xmodem...
Understand which versions of software support the features you require and whether there are any hardware or software compatibility issues.
Note: You must be running at least software version 12.0(7)W5(15a) or later to be able to do Xmodem or Ymodem disaster recovery from ROMmon (rom monitor mode) on the 2948G-L3. If a system image is lost before upgrading to 12.0(7)W5(15a) or later, the only way to recover the 2948G-L3 is to return it to Cisco as an RMA.
[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...