What are you trying to ping . In order to have the layer 3 interface up on the 3750 you will need at least one active user on that switch in that vlan otherwise the SVI will be up/down I believe . Check that the trunk and etherchannel are working ok, do a show interface trunk and a show etherchannel detail and make sure the trunk and etherchannel are correct.
Yes, I was trying that but no way, another more thing is when I put the interface of the 7304 out of the etherchannel I can see the switch with the sh cdp neig but when interfaces are grouped to teh etherchannel there is no way no see the switch via cdp. I can see always the router from the 3750 via cdp.......
[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...