Generally, Cisco's serial interfaces can be summed up to three major types. As you've mentioned, there are synchronous-only serial interfaces. These can be connected to a CSU/DSU and can support up to E1 speeds. A variety of the sync serial is the high-speed serial interface or HSSI. This can operate up to 52Mbps.
Then there are serial interfaces that are software-configurable to operate in sync or async. These types however, can operate only at low-speeds (128k sync or 115k async). These are typically found on 1600 series routers and 2600/3600 series network modules (ex. NM-8 A/S)
The third type is the pure async, much like the aux port on most cisco boxes.
[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...