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 interface
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
r 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
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
gt; 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
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'
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
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
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
ote:
> 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
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
terminate iBGP sessions on
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=73339&t=73305
--
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Report misconduct and Nondisclosure violations to [EMAI
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
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
ounce 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:
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
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 peo
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=73305&t=73305
--
FAQ, list archives, and subscription in
Shibu Nair wrote:
>
> May find it very simple but could not find an accurate
> answer... Did not
> have a lab switch
> to try it out...
>
> If i make a loopback (cross cable) connectivity between 2 ports
> within the
> switch.
> And having the STP enabled on
May find it very simple but could not find an accurate answer... Did not
have a lab switch
to try it out...
If i make a loopback (cross cable) connectivity between 2 ports within the
switch.
And having the STP enabled on the switch, what would be the status for the
ports...
I thought it is
Papp [SMTP:[EMAIL PROTECTED]
> Enviada em: segunda-feira, 23 de junho de 2003 15:14
> Para: Henrique Issamu Terada
> Cc: [EMAIL PROTECTED]
> Assunto: Re: RES: Loopback subnet mask [7:71121]
>
> You mean the point of the exercise is whethe
ooperation.
> >
> >
> > -Mensagem original-
> > De: Zsombor Papp [SMTP:[EMAIL PROTECTED]
> > Enviada em: segunda-feira, 23 de junho de 2003 11:21
> > Para: [EMAIL PROTECTED]
> > Assunto: Re: Loopback subnet m
Zsombor Papp [SMTP:[EMAIL PROTECTED]
> Enviada em: segunda-feira, 23 de junho de 2003 11:21
> Para: [EMAIL PROTECTED]
> Assunto: Re: Loopback subnet mask [7:71121]
>
> Hi,
>
> IMHO it is technically incorrect to configure anything but /32 on a
Hi,
IMHO it is technically incorrect to configure anything but /32 on a
loopback. Last time I checked, OSPF in IOS advertised the loopback address
as /32 regardless of the configured mask, but other protocols did not (ie.
they advertised the mask as you configured it). So if you ever configure
Hi Group,
I'm practicing the Satterlee and Hutnik labs. Sometimes they
ask to configure the loopback interfaces differently.
interface Loopback 0
ip address 26.26.26.26 255.255.255.0
or
interface Loopback 0
ip address 29.29.29.29 255.255.255.255
Is there a subtle but important diffe
This should help.
http://www.cisco.com/en/US/tech/tk713/tk584/technologies_tech_note09186a0080
0a754b.shtml
-Original Message-
From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]
Sent: Friday, February 21, 2003 1:00 PM
To: [EMAIL PROTECTED]
Subject: RE: Loopback Testing [7:63515]
Do
Yes it has a BuiltIn CSU/DSU
--
Curious
MCSE, CCNP
""Priscilla Oppenheimer"" wrote in message
news:[EMAIL PROTECTED]
> Do the routers have built-in CSU/DUSs? That makes a difference.
>
> Priscilla
>
> Curious wrote:
> >
> > I want to do a
Actually, Frame Relay switches don't forward the loop messages received on
local
port to the remote port. You can only loop between each end router and it's
local
Frame Relay switch. So, unless this is a cross-over simulation, you won't be
able to achieve end-to-end loop. So, you
I want to do a loopback testing between my router and a remote router over a
Frame Circuit.
Tell me what i need to configure
Both routers are Cisco 2600 and running 12.0 IOS.
thanks,
--
Curious
MCSE, CCNP
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=63515&
This is the address of the loopback.
conf t
int loopback 0
no ip address 10.0.0.X 255.255.255.0
Daniel Ladrach
CCNP, CCNA
WorldCom
-Original Message-
From: J. Johnson [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 11, 2003 12:23 PM
To: [EMAIL PROTECTED]
Subject: newbie
]
Subject: newbie: removing an ip route to loopback [7:62811]
Please pardon my newbieness ...
I have a router with this in the routing table:
Router#show ip route
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, Loopback0
Router#
I would like to
)
doesn't do the trick:
Router(config)#no ip route 10.0.0.0 255.255.255.0 Loopback 0
%No matching route to delete
Router(config)#
This command with other addresses works the way I would expect it to work.
E.g. I can do "ip route 10.0.0.3 255.255.255.255 Loopback 0" and the route
ap
Hi All
I am having the T1 CSU/DSU card. While configuring the remote loopback
settings, i am facing some problems like, whatever has been given in cco is
not happening.
The following the excerpt from the cco doc.
The service-module t1 remote-loopback command specifies whether the T1
CSU/DSU
0 0 32768 i
> *> 202.202.1.1/32 202.202.1.1 0 0 111 i
> r5#
>
> why is the route of : * 101.101.101.77/32 not coming as the best path
> with > on R2 as in the table of r5 it is displaying the path of *>
> 202.202.1.1/32
and plus I dont want to give
any static routes to the peers , as they are getting the path of destination
loopback is known via OSPF , and the routes are there in the routing table .
Is there any other solution for this solution , by peering with loopbacks .
thanks,
Navin Parwal
Message
loopback to 5300b to get the irv
announcement to the caller. 5300b can keep 711 code
ivr, and this ivr is only used for authetication, the
5300a can use 729 code for real time vocie.
Is this possible? how to config the loopback?
thanks.
min
=
Min Wang
Mailto: [EMAIL
csu internal to the router, the lack of commands suggests an external csu.
Brian
- Original Message -
From: "Simmi Singla"
To:
Sent: Saturday, December 21, 2002 7:07 PM
Subject: E1 remote loopback [7:59704]
> Hi all,
> How do I configure remote loopback for a E1
Hi all,
How do I configure remote loopback for a E1 link on a cisco Router. I could
do it for T1 using the FDL. But for E1 I can't find any commands for remote
loopback configuration.
Moreover can any body tell me that what these options are
Can U explain me for what these loopback commands
At 04:00 PM 12/10/2002 +, Christopher Dumais wrote:
>Can you use Loopback interfaces to pass OSPF traffic? Here is my example:
The below routers will never form an OSPF adjacency. loopback addresses
are virtual as you likley know, and inherently stub networks (ie they
cannot be used
Could you share with the rest of us? :-)
-Original Message-
From: Christopher Dumais [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 10, 2002 2:42 PM
To: [EMAIL PROTECTED]
Subject: Re: Loopback and OSPF [7:58890]
Never mind..I found my answer. Thanks!
Chris Dumais, CCNP, CNA
Sr
Never mind..I found my answer. Thanks!
Chris Dumais, CCNP, CNA
Sr. Network Administrator
NSS Customer and Desktop Services Team
Maine Medical Center
(207)871-6940
[EMAIL PROTECTED]
>>> "Christopher Dumais" 12/10/02 11:00:45 AM >>>
Can you use Loopback interfaces to p
Can you use Loopback interfaces to pass OSPF traffic? Here is my example:
Router A
Interface loopback0
ip address 10.10.10.10 255.255.255.0
Interface Vlan 2
ip address 2.2.2.2 255.255.255.0
Router ospf 1
network 0.0.0.0 255.255.255.255 area 0
Router B
Interface loopback 0
ip address
Cable Guy wrote:
>
> When you put a hardware loopback plug on a serial to test it, why does the
> router see it as a loopback? With the show int serial command, you will see
> -serial up, line protocol up (loopback mode)-
> Of course it needs to see it as loopback other
Mariusz Trojanowski wrote:
>
> Cable Guy wrote:
> >
> > When you put a hardware loopback plug on a serial to test it,
> > why does the
> > router see it as a loopback? With the show int serial command,
> > you will see
> > -serial up, line pro
In loopback, the serial port sees its own keepalives come back. They are
sequenced so it can tell. The MySeq number would be going up, but the
MineSeen number wouldn't since nobody else is seeing them. I think that's
the gist of it. There's a lot of info about this on Cisco'
Cable Guy wrote:
>
> When you put a hardware loopback plug on a serial to test it,
> why does the
> router see it as a loopback? With the show int serial command,
> you will see
> -serial up, line protocol up (loopback mode)-
It's magic - seriously.
http://www.ci
Yes, that describes the loopback plug. But, loopback isn't just a crossing
of the wires, but a state the router is in as well. If there is a fault in
the wiring, or csu/dsu is put in loopback mode, the router will see and
change to "loopback mode" which you can see in show c
When you put a hardware loopback plug on a serial to test it, why does the
router see it as a loopback? With the show int serial command, you will see
-serial up, line protocol up (loopback mode)-
Of course it needs to see it as loopback otherwise the router wouldn't
operate and
age
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> thanks a lot Stefan!
>
> I got the answer the doc says I need to put an "ip ospf network type
> point-to-point" cmd on the loopback in order to to reveal their actual
> subnet identity. I do not know whether this will
thanks a lot Stefan!
I got the answer the doc says I need to put an "ip ospf network type
point-to-point" cmd on the loopback in order to to reveal their actual
subnet identity. I do not know whether this will work for a
point-to-multipoint network. Let me look for an alternativ
OSPF Loopback [7:52478]
Hi,
How to show a /24 loopback address as /24 entry itself in the routing table?
By default in OSPF it is shown as a /32 even if you advertise as /24. I
didn't do any summarization inbetween.
Any helpers please...
thanks
Message Posted at:
http://www.groupstud
Hi,
How to show a /24 loopback address as /24 entry itself in the routing table?
By default in OSPF it is shown as a /32 even if you advertise as /24. I
didn't do any summarization inbetween.
Any helpers please...
thanks
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&
ng
incorrectly
configured that is responsible for any of the async connected devices
inability to reach
the e0(directly connected) interface
Nigel
- Original Message -
From: "Tunji Suleiman"
To:
Sent: Saturday, August 03, 2002 2:22 PM
Subject: Re: Routing with IP Unnumbered Lo
Tunji,
The network commands that you removed were simply useless, it is normal that
they did not have any impact on your routing table. Question: Is that
normal that the ip address range of the async group is the same as your
loopback. Both are in the 192.168.200.0/24 range. Why don't you
the 3640, then
the issue should be resolved.
TIA
>From: "Nigel Taylor"
>Reply-To: "Nigel Taylor"
>To: [EMAIL PROTECTED]
>Subject: Re: Routing with IP Unnumbered Loopback [7:50581]
>Date: Sat, 3 Aug 2002 10:17:44 GMT
>
>Tunji,
> See Inl
Tunji,
See Inline...
- Original Message -
From: "Tunji Suleiman"
To:
Sent: Saturday, August 03, 2002 5:20 AM
Subject: Routing with IP Unnumbered Loopback [7:50581]
> Hi all,
>
> I am reposting this because there were no responses to the first post. I
am
&
ng with IP Unnumbered Loopback [7:50581]
> Hi all,
>
> I am reposting this because there were no responses to the first post. I
am
> trying to conserve IP addresses by using private IPs for dialin users.
From
> clients I can dial in to network but cant get beyond 3640 NAS, cant eve
Hi all,
I am reposting this because there were no responses to the first post. I am
trying to conserve IP addresses by using private IPs for dialin users. From
clients I can dial in to network but cant get beyond 3640 NAS, cant even
ping 3640 E0/0 LAN IP address. From 3640, I can ping Lo0 fro
Hi all,
I am trying to conserve IP addresses by using private IPs for dialin users.
>From clients I can dial in to network but cant get beyond 3640 NAS, cant
even ping e0/0. From 3640, I can ping connected client and any host on
Internet. From 2611 Internet gateway, I can ping 3640 e0/0 and lo
Hi Group,
This is a re-post as I think the other got lost.
Apologies if it didn't.
I set up an IGRP lab recently to show unequal cost
load balancing, but came across the following problem
during the process.
I had 3 routers as the diameter and 2 loopback
interfaces configured on the 1s
Hi,
Not really a question but more of an observation.
I put a lab together do demonstrate IGRP unequal cost
load balancing recently, and configured 2 loopback
addresses at either end of the network and advertised
them via the network command.
I calculated the BWigrp + DLYigrp i.e the metric
You have to apply crypto map on real interface, otherwise phase I won't kick
off in case of crypto acl match. You can configure isakmp identity and peer
ip to loopback, provided you use the command crypto map mymap local-address.
-Keyur Shah-
CCIE# 4799 (Security; Routing and Switching)
Yes, you can apply crypto may on the loopback, tunnel or Ethernet
interfaces. Just make sure that routing is setup correctly and use
"crypto map mymap local-address lo0".
You can create tunnel between loopback interfaces or use on one router
loopback interface and on another us
Hi All,
Can I apply a crypto map to loopback interface or Ethernet Interface...?
(Currently the VPN tunnel is working fine with the crypto map applied to
Serial interface of the internet edge router)
IF yes, can I create a tunnel between loopback interfaces in peers...? Can I
create a tunnel
Well, our network is made up of a lot of remote sites, in a sort of
three-level tree. Each site has a range of networks that can be
summarised. The loopback(s) for a site are part of that range, so once
the site's networks are summarised, it doesn't add any extra to the route
t
I generally thought a /32 was ideal, making it easily distiguishable from
your normal networks would be an idea for the purposes of troubleshooting!
Message Posted at:
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--
FAQ, list archive
what range do people generally use? also.. if people
use /32 masks and advertise all of the loopback
"networks" via an igp doesn't that add a crap-load of
discontiguous routes to the ole route-table?
i guess what i am looking for is a case-study for a
large bgp/ospf installatio
Mark,
You can _advertise_ the whole subnet, but the problem is that once you
assign a subnet to the loopback, you cannot assign another interface an IP
address in the same address space. I'm still not sure I understand what
your trying to accomplish here. If you have hosts that will ha
, 2002 4:11 PM
To: Mark Odette II
Cc: [EMAIL PROTECTED]
Subject: Re: Loopback Interfaces..long reply, read carefully please to
[7:38285]
The answer everyone keeps giving you is no.
Mark Odette II wrote:
OK, For some reason, my first time of sending this reply got chopped, sohere
it is
The answer everyone keeps giving you is no.
Mark Odette II wrote:
>OK, For some reason, my first time of sending this reply got chopped, so
>here it is again.
>
>Brian, et al.,
>Please Note the following:
>
>***All I wanted to know was: Can the Loopback Interface be use
OK, For some reason, my first time of sending this reply got chopped, so
here it is again.
Brian, et al.,
Please Note the following:
***All I wanted to know was: Can the Loopback Interface be used to host a
complete subnet (and the Router make routing decisions with this inteface),
or is its
EIGRP 1750
Network 192.168.100.0 >>Brian
""Mark Odette II"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> OK, I'll make the question simpler.
>
>
> Can you use a loopback interface in the same respect that you would u
Mark,
It sounds like you want to create a huge subnet that spans across 3 links?
If you are trying to have both the ethernet interface and the serial
interface be unnumbered to the loopback interface you would inherintly
introduce a problem to the router. The problem would be with the internal
OK, I'll make the question simpler.
Can you use a loopback interface in the same respect that you would use an
ethernet interface?
Create the loopback: Interface Loopback0
Assign it an IP with a /24 mask : ip address 192.168.10.1
Configure the subnet assigned to the loopback interface
What in the world is the question about, what are you trying to do.
Ping the remote routers, they have a serial
interface that you can ping, or the ethernet. Why do you need a
loopback, what routing protocol are you
running, where is a config? We can't figure out what you are talking
cc:
Subject:Loopback Interfaces... [7:37933]
Just when I thought I understood Loopback interfaces, I decided while
redesigning a network, that I would use them but now I'm questioning
my
comprehension.
Somebody clear the confusion for me- Please.
This is what I'm
This has got to be the most confusing message I have ever read.
A loopback interface is just a virtual interface. It's not a real interface
it's just a virtual interface you can create within the router, and you can
create as many as you want.
The biggest reason someone would wan
Just when I thought I understood Loopback interfaces, I decided while
redesigning a network, that I would use them but now I'm questioning my
comprehension.
Somebody clear the confusion for me- Please.
This is what I'm wanting to do, but not sure if this is proper utilization,
Rob,
Very interesting.
I have my lab in 4 weeks too in Brussels.
Is there anywhere on CCO that details anything to do with this and why
loopbacks should not be used in Area0.
?Is this OSPF Specific or LAB specific?
I'll try and think about this today and see if I can figure out why.
Richard
ruary 2002 07:02
To: [EMAIL PROTECTED]
Subject: Re: Where to place the loopback in an ospf environment
[7:34441]
when in the Lab, do as the folder ( and/or the proctor ) instructs :->
Chuck
wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi there,
>
> sorr
when in the Lab, do as the folder ( and/or the proctor ) instructs :->
Chuck
wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi there,
>
> sorry for the posting on more.
> But I'm currently 4 weeks before the CCIE lab and I'm really confusedly
about
> this.
> Some guys told me
Hi there,
sorry for the posting on more.
But I'm currently 4 weeks before the CCIE lab and I'm really confusedly about
this.
Some guys told me place it near the area 0 and other guys say it _dfepends_
Any guides for this ???
Mit freundlichen Gr|_en
Udo Konstantin / koud , GS KA
NEEF LAPPCOM Gm
te in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi all,
>
> The scenario is this :
>
> R2R3---R4
>
>
> R3 is a FR switch between 2 DTE devices R2 and R4.
>
> R4 is having a loopback i
thers will respond.
Tim
-Original Message-
From: Rajesh Kumar [mailto:[EMAIL PROTECTED]]
Sent: Friday, January 18, 2002 12:36 PM
To: [EMAIL PROTECTED]
Subject: Advertising loopback interfaces via IGRP. [7:32498]
Hi all,
The scenario is this :
R2
Hi all,
The scenario is this :
R2R3---R4
R3 is a FR switch between 2 DTE devices R2 and R4.
R4 is having a loopback interface, ethernet interface and a serial
interface. I am running IGRP 2 on R4 on loopback and serial
If you are using a classful routing protocol and advertising the Loopback,
it's going to burn the /24 anyway, you could use it.
-Eh
-Original Message-
From: Lupi, Guy [mailto:[EMAIL PROTECTED]]
Sent: Thursday, January 17, 2002 4:16 PM
To: [EMAIL PROTECTED]
Subject: RE: Loopba
ything other than a /32 bit
mask
> > on a virtual interface?
> > You are not going to route using the loopback address are you?
> >
> >
> >
> > Jim Walker
> > Master Network Engineer
> > Partners HealthCare System, Inc.
> > Information Syste
you could also do a FLRP or as known in the industry as a Full Loopback
Reverse Path
-Original Message-
From: Lupi, Guy
Sent: Thursday, January 17, 2002 4:16 PM
To: [EMAIL PROTECTED]
Subject: RE: Loopback IP masking - 32 or 24 bits? or? [7:32345]
Well, you could use part of the
Well, you could use part of the loopback subnet for a nat pool if your
loopback is a public IP address, that is one reason you may want more than a
/32 on the interface. Just throwing things out there.
-Original Message-
From: Walker, Jim [mailto:[EMAIL PROTECTED]]
Sent: Thursday
ht. Why would you use anything other than a /32 bit mask
> on a virtual interface?
> You are not going to route using the loopback address are you?
>
>
>
> Jim Walker
> Master Network Engineer
> Partners HealthCare System, Inc.
> Information Systems / Technical Services &
Your friend is right. Why would you use anything other than a /32 bit mask
on a virtual interface?
You are not going to route using the loopback address are you?
Jim Walker
Master Network Engineer
Partners HealthCare System, Inc.
Information Systems / Technical Services & Operations
Tel.
Hi, all;
I recently started considering why I might want to have a 32-bit mask
for my loopbacks as opposed to some other scheme - for instance using
the regularly documented 24-bit mask on a loopback.
I am speaking of course, of: Interface Loopback0
To: [EMAIL PROTECTED]
> Subject: cannot ping loopback IP addresses [7:29345]
>
> I have two routers connected to the same LAN but I cannot ping the
> loopback
> IP address of each other. from router1 I am not able to ping the loopback
> of
> router2 and vice-versa. Why ?.
uters connected to the same LAN but I cannot ping the
loopback
> IP address of each other. from router1 I am not able to ping the loopback
of
> router2 and vice-versa. Why ?.
>
> Here is the sample config of the two routers.
>
> --
> Router1:
>
Set the masks of your loopback addresses to 255.255.255.255
""mindiani mindiani"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I have two routers connected to the same LAN but I cannot ping the
loopback
> IP address of each other. from
the same LAN but I cannot ping the
loopback
> IP address of each other. from router1 I am not able to ping the loopback
of
> router2 and vice-versa. Why ?.
>
> Here is the sample config of the two routers.
>
> --
> Router1:
>
> host
I have two routers connected to the same LAN but I cannot ping the loopback
IP address of each other. from router1 I am not able to ping the loopback of
router2 and vice-versa. Why ?.
Here is the sample config of the two routers.
--
Router1:
hostname
>From what I've read the functions/benefits of the loopback interface
includes that "it provides an entry point for console based telnet
sessions in the event that all physical interfaces are down".
Why is this a benefit?
You can always connect through the console to configu
At 10:44 AM 11/19/01 -0500, Mark Latis wrote:
>What is the purpose of the Loopback and the Null interfaces ?
>(I know that the loopback interface can be used to emulate an always-on
>interface to be used for point-topoint unnumbered links )
>
>Thanks,
>Mark
Well, you got the l
> - Original Message -
> From: "Mark Latis"
> To:
> Sent: Monday, November 19, 2001 3:44 PM
> Subject: Loopback and Null interfaces [7:26703]
>
> > What is the purpose of the Loopback and the Null interfaces ?
> > (I know that the loopback interface ca
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