RE: Loopback Interface [7:73305]
It's very simple. A loopback interface provides a connection point on a router that is not tied to a physical interface. It is very useful in many situations, for basically the same reason. Take OSPF for example. Without a loopback it will use the address of one of its physical interfaces for the routerID (unless you force it). If that interface was to go down, then the OSPF process would burp, and you'd have "problems." Using a loopback interface will ensure the same routerID no matter what the physical interfaces were doing. Take management traffic for example. Typical management applications use SNMP to poll the router for interface statistics, etc. If you polled on the primary WAN interface, for example a T1 line, and that T1 went down, then you would not be able to retrieve any statistics at all, even if you had a backup ISDN line on the router. Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -Original Message- From: Robert Edmonds [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 05, 2003 12:47 PM To: [EMAIL PROTECTED] Subject: Re: Loopback Interface [7:73305] 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73550&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
Re: Loopback Interface [7:73305]
So, if I understand correctly, aside from OSPF router ID's and the like, just use a loopback interface when you want an always up/up interface. That's pretty simple. ""John Neiberger"" wrote in message news:[EMAIL PROTECTED] > Exactly right. Sometimes it's nice to have a virtual interface whose status > is not tied directly to a physical interface. We've mentioned several > configurations where this is the case. From the routers perspective it may > have a couple of special properties, since it's virtual, but it's still just > another interface, as Dave said. > > >>> MADMAN 8/5/03 1:25:25 PM >>> > 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 > **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 > **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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73561&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
RE: Loopback Interface [7:73305]
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
RE: Loopback Interface [7:73305]
n_guide_chapter09186a0080087da4.html#3302 -Original Message- From: Robert Edmonds [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 05, 2003 9:47 AM To: [EMAIL PROTECTED] Subject: Re: Loopback Interface [7:73305] 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73568&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
Re: Loopback Interface [7:73305]
Rusty, was there a URL here that was truncated? If so, I would very much like to see it. n_guide_chapter09186a0080087da4.html#3302 ""Wilmes, Rusty"" wrote in message news:[EMAIL PROTECTED] > n_guide_chapter09186a0080087da4.html#3302 > > -Original Message- > From: Robert Edmonds [mailto:[EMAIL PROTECTED] > Sent: Tuesday, August 05, 2003 9:47 AM > To: [EMAIL PROTECTED] > Subject: Re: Loopback Interface [7:73305] > > > 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 > **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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73635&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
Re: Loopback Interface [7:73305]
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=73562&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
Re: Loopback Interface [7:73305]
You've got it! They can be used for iBGP, DNS resolution, GRE tunnel endpoints, OSPF/BGP Router IDs, route summarization...the list goes on. >>> Robert Edmonds 8/5/03 3:26:35 PM >>> So, if I understand correctly, aside from OSPF router ID's and the like, just use a loopback interface when you want an always up/up interface. That's pretty simple. ""John Neiberger"" wrote in message news:[EMAIL PROTECTED] > Exactly right. Sometimes it's nice to have a virtual interface whose status > is not tied directly to a physical interface. We've mentioned several > configurations where this is the case. From the routers perspective it may > have a couple of special properties, since it's virtual, but it's still just > another interface, as Dave said. > > >>> MADMAN 8/5/03 1:25:25 PM >>> > 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 > **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 > **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 **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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73566&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
Re: Loopback Interface [7:73305]
Exactly right. Sometimes it's nice to have a virtual interface whose status is not tied directly to a physical interface. We've mentioned several configurations where this is the case. From the routers perspective it may have a couple of special properties, since it's virtual, but it's still just another interface, as Dave said. >>> MADMAN 8/5/03 1:25:25 PM >>> 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 **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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73553&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
RE: Loopback Interface [7:73305]
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 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 **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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73559&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
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=73552&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
Re: Loopback Interface [7:73305]
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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73538&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
RE: Loopback Interface [7:73305]
terminate iBGP sessions on Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73339&t=73305 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Loopback Interface [7:73305]
Loopbacks are handy for use with ip unnumbered. If you have a multipoint interface using subinterfaces you could give every subinterface the same address and keep everything on the same subnet. They're also handy for DNS. If your router hostname resolves to its loopback address you'll be able to reach the router using the hostname as long as there is at least one real interface up. If you were to resolve the name to an actual interface address you wouldn't be able to reach the router at all of that interface were down. John >>> Wilmes, Rusty 7/31/03 4:49:11 PM >>> our remote routers are configured to do ddr through the loopback interface. -Original Message- From: Larry Letterman [mailto:[EMAIL PROTECTED] Sent: Thursday, July 31, 2003 1:40 PM To: [EMAIL PROTECTED] Subject: RE: Loopback Interface [7:73305] To monitor the router, since its up/up if the router is up. Larry Letterman Cisco Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of DeVoe, Charles (PKI) Sent: Thursday, July 31, 2003 12:16 PM To: [EMAIL PROTECTED] Subject: Loopback Interface [7:73305] I know the loopback interface is useful for assigning the router ID. Is there any other purpose? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73324&t=73305 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Loopback Interface [7:73305]
our remote routers are configured to do ddr through the loopback interface. -Original Message- From: Larry Letterman [mailto:[EMAIL PROTECTED] Sent: Thursday, July 31, 2003 1:40 PM To: [EMAIL PROTECTED] Subject: RE: Loopback Interface [7:73305] To monitor the router, since its up/up if the router is up. Larry Letterman Cisco Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of DeVoe, Charles (PKI) Sent: Thursday, July 31, 2003 12:16 PM To: [EMAIL PROTECTED] Subject: Loopback Interface [7:73305] I know the loopback interface is useful for assigning the router ID. Is there any other purpose? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73321&t=73305 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Loopback Interface [7:73305]
1) It's an interface that never goes down. 2) It has a neat use in a situation where you have a VPN router-to-router and are using NAT. You may have a server that uses a static NAT to allow access from outside. To allow traffic from the server to traverse the VPN tunnel - use a route-map to bounce the VPN traffic off an address in the subnet of the loopback interface (which has no NAT statements). 3) In labs a small router can source many routes. > -Original Message- > From: DeVoe, Charles (PKI) [mailto:[EMAIL PROTECTED] > Sent: Thursday, July 31, 2003 2:16 PM > To: [EMAIL PROTECTED] > Subject: Loopback Interface [7:73305] > > > I know the loopback interface is useful for assigning the > router ID. Is > there any other purpose? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73316&t=73305 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Loopback Interface [7:73305]
To monitor the router, since its up/up if the router is up. Larry Letterman Cisco Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of DeVoe, Charles (PKI) Sent: Thursday, July 31, 2003 12:16 PM To: [EMAIL PROTECTED] Subject: Loopback Interface [7:73305] I know the loopback interface is useful for assigning the router ID. Is there any other purpose? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73317&t=73305 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Loopback Interface [7:73305]
when doing unnumbered interfaces routing via loopbacks. Virtual templates, dialer interfaces etc... I use loopbacks for many testing reasons. load balancing and redundancy via BGP use as peer in DLSW for redundancy/stability generate routes Those are a couple I can think of off the top of me noodle Dave DeVoe, Charles (PKI) wrote: > I know the loopback interface is useful for assigning the router ID. Is > there any other purpose? -- 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=73315&t=73305 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
