From where are you trying to ping? If you are on a workstation on the Ethernet it works to ping the Ethernet because the router Ethernet and the workstation are on the same subnet (I hope). The workstation will need a default gateway to ping anything off the local subnet (the serial port). Am I correct in the assumption that you are at a workstation on the Ethernet? If so, check the default gateway setting of the workstation. It should be the address of the Ethernet.
[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...