Juntao gave you good answers, but I thought I'd comment on the issue of whether you should shut down a serial interface before changing the encapsulation. It is the "polite" thing to do, although it's not necessary to get it to work.
It sounds like you were using PPP before. Remember that the Link Control Protocol (LCP) is connection-oriented, working in the control plane. It would be nice if you gave it a chance to gracefully shut down the connection with the router on the other end. If you don't, you'll leave the other router wondering what happened, until a timeout occurs and it closes the connection. The router will waste resources trying to figure out whether its partner is alive or dead. The same applies if you were changing from Frame Relay or Cisco's HDCL. They also both have connection-oriented components, working in the control plane, that will waste resources trying to figure out whether the connection should be closed. Of course, you're going to soon change the other router too, so it's really not a big deal, but it's just a matter of letting protcools behave in their intended way to hopefully not waste router resources. To be honest, I doubt that most people working in the field worry about such things, (not to say that operations types aren't graceful. :-) _______________________________ Priscilla Oppenheimer www.troubleshootingnetworks.com www.priscilla.com Simmi Singla wrote: > > Hi All, > Problem 1) > Can anybody explain me cofiguring IETF encap on the main > interface and confguring ietf per dlci on the sub > interface,what coul be implications. > > My Topology > > centrral > router---->switch------remote-ends(non cisco)(many cisco > & othervendors) > 10 sub interfaces > > > > This router is in central site and have 10 subinterfaces > point-point .The remote side can be cisco router or non cisco > also. > Will ietf if configured on main interface will work with cisco > routers on remote side or only used for non cisco routers,or > should I opt for ietf encap on per dlci basis on subinterface. > Example > Sub interface > frame-relay interface-dlci 46 ietf > > or main interface > as encap frame-relay ietf > > Problem 2) Is it necessary to shut the interface before > changing encap on the main interface for example earlier i have > ppp encap,now i change to ietf is it I have to change my > connection. > Its mentioned in cisco documentation that > Its recommeneded taht we need to shut the interface before > switching between encapsulations on Main interface. > Thanx in advance > > > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61624&t=61590 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
