Thanks Dave, I know - but if you are relying on just the address of just an interface on a router with many WAN/LAN connections, you may have another way of reaching it. Which was the point I was trying to make. When monitoring a network do not assume a router is down just because a link/interface is down.
All the best. Dom Dom wrote: > OK Let me have a go at this - > > A router by definition has at least two interfaces, in most cases it > has many more. > > How do we define the ip address of the router? > > Is it an Ethernet (LAN facing) interface or a (for example) Serial, > HSSI or other WAN facing interface? > > If any of these interfaces goes down (fails) then we cannot get to the > router. > > This is why we set a loopback interface address - nothing to do with > routing or metrics etc, just making sure that we can reach the router You won't "get to" the router no matter how many loopbacks you have if your phyical connection/s fail!!! :) Dave > > Best regards, > > Dom Stocqueler > SysDom Technologies > Visit our website - www.sysdom.org > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of MADMAN > Sent: 05 August 2003 19:47 > To: [EMAIL PROTECTED] > Subject: Re: Loopback Interface [7:73305] > > > I think your thinking way too hard about this;) A loobback is > nothing more than a logical interface as opposed to a physical > interface. As far as the routing process is concerned it's just another > > interface. Don't know how to articulate it any further. > > Dave > > Robert Edmonds wrote: > >>You gentlemen have pointed out some good uses for loopback interfaces. > > >>However, my dilema still remains that I have yet to have somebody >>solidly explain loopback interfaces in a way that my simple mind can >>understand. I have also been unsuccessful in finding any website that > > >>accomplish this. Any takers? >> >>Robert >> >>""p b"" wrote in message >>news:[EMAIL PROTECTED] >> >> >>>terminate iBGP sessions on >> >>**Please support GroupStudy by purchasing from the GroupStudy Store: >>http://shop.groupstudy.com FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > > -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 "Government can do something for the people only in proportion as it can do something to the people." -- Thomas Jefferson Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73565&t=73305 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
