I think support for /31 masks was introduced in 12.2.8 though I'm
sure someone will correct me if I'm mistaken;)
Dave
s vermill wrote:
MADMAN wrote:
Glad you got it figured out and I hope you learned some
reason(s) not
to do unnumbered. I can't think of and good reasons for it and
if you
specific route for that IP.
Daniel Ladrach
CCNP,CCNA
WorldCom
-Original Message-
From: Deepak N [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, January 29, 2003 4:07 PM
To: [EMAIL PROTECTED]
Subject: IP unnumbered for HDLC connection [7:62134]
HI All
I have simple configuration of HDLC
Hi Ladrach
I tried with the route statement. it worked perfectly. but the problem is
when i am running the routing protocol. i have given detailed configs for 3
different cases in the previous mails.
Regards
Deepak
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=62193t=62134
Deepak N wrote:
HI All
I have simple configuration of HDLC connected back to back.
If i give ip unnumbered at one end and the static ip address at
the other end, I cant ping the either end. But when i give show
ip int brief, it shows the line and protocol are up.
If i give ip unnumbered
Hi Vermill
Now I got the point. So when i am using the numbered interface, the router
tries to reach the next hop via the next hop ip address, in my case it is
behind the directly connected interface.But it has no way of finding the
next hop ip address behind the unnumbered interface. So it was
suggestions
that were made. If, on the numbered end, you entered a static route to the
unnumbered interface IP using the outgoing interface, it seems like it might
work. Something like:
'ip route 192.168.100.1 s0'
where 192.168.100.1 was the IP of the interface being referenced in the 'ip
unnumbered
Glad you got it figured out and I hope you learned some reason(s) not
to do unnumbered. I can't think of and good reasons for it and if you
running out of addresses I have an RFC full of them for you;)
Dave
Deepak N wrote:
Hi Vermill
Now I got the point. So when i am using the numbered
MADMAN wrote:
Glad you got it figured out and I hope you learned some
reason(s) not
to do unnumbered. I can't think of and good reasons for it and
if you
running out of addresses I have an RFC full of them for you;)
Dave,
I heard rumor to the effect that Cisco would introduce /31 mask
In mail.net.groupstudy.pro, you wrote:
I heard rumor to the effect that Cisco would introduce /31 mask support
for
serial p-t-p links. Anyone tried that yet? I keep forgeting to when on a
router with shiny new IOS.
It works well on all platforms I've used it on. Introduced in 12.2(2)T,
[EMAIL PROTECTED] (Kaj J. Niemi) wrote:
In mail.net.groupstudy.pro, you wrote:
I heard rumor to the effect that Cisco would introduce /31
mask support for
serial p-t-p links. Anyone tried that yet? I keep
forgeting to when on a
router with shiny new IOS.
It works well on all
HI All
I have simple configuration of HDLC connected back to back.
If i give ip unnumbered at one end and the static ip address at the other
end, I cant ping the either end. But when i give show ip int brief, it shows
the line and protocol are up.
If i give ip unnumbered at both ends, now i am
Hi Deepak
When you configure ip unnnumbered on an interfaces it looks like an
interface with a /0 mask.
On the other side with a configured ip address on the interface you have a
different mask. So the two connected interfaces don't belong to the same
network.
What you could do is to configure on
Hi Claudio
Thanks for quick response.
But i have tried that options. i defined a static ip route to the network
on the other end through the connecting interface.it did work.
But when i am using the routing protocol, i am not able to ping either end.
But if i make the other end also
Which is failing to get to the other side? The ping (echo) or the ping reply
(echo reply). Pinging could fail for either reason. Debug icmp and you might
get more info.
Also, send us your configs. Help us help you.
Priscilla
Deepak N wrote:
Hi Claudio
Thanks for quick response.
But i
Hi
What kind of routing protocol are you using? Ospf can not build an adjacency
this way.
With other routing protocols you should be able to exchange routing tables.
But you won't be able to send traffic, because the router does not know
where the next-hop address is. So you still need this
Hi all
The following are the configurations of the routers and the ping outputs.
I have given 3 cases.
1) When ip unnumbered at one end and static routes are defined
sdmheadend#sh run
Building configuration...
Current configuration : 1115 bytes
!
version 12.2
service timestamps debug
Hi
Give us a look at the routing table from both routers.
The router with the configured ip address on the Serial interface does not
know how to get to the next hop address.
Do you see in the routing table the next-hop address or the outbound
interface?
see you
Message Posted at:
ip route should tell you a lot.
Priscilla
Deepak N wrote:
Hi all
The following are the configurations of the routers and the
ping outputs.
I have given 3 cases.
1) When ip unnumbered at one end and static routes are defined
sdmheadend#sh run
Building configuration...
Current
HI Claudio
Please find the following for the different cases i mentioned.
Regards
Deepak
1)When ip unnumbered at one end and static routes are defined
sdmheadend#sh ip rou
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O
Hi
when i did debug ip icmp, i got the message that its unroutable when one
end is numbered and the other end is unnumbered. This is expected because it
doesnt have the next hop ip address to reach. But i expect the same
behaviour when both are unnumbered. But it is able to send the rip updates
FastEthernet0/0
no ip address
shutdown
speed auto
!
interface Serial0/0
ip unnumbered Loopback0
no fair-queue
!
interface Serial0/1
no ip address
shutdown
!
ip classless
ip route 12.12.12.0 255.255.255.0 Serial0/0
no ip http server
ip pim bidir-enable
!
!
!
call rsvp-sync
!
dial
Folks,
Anyone have any sample configs of 2 peers doing EBGP with both interfaces
using ip unnumbered and pointing to loopback addresses? I don't even know
if this can be done.
Daren
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=57901t=57901
interface Serial0
ip unnumbered Loopback1001
the ebgp-multihop is required since the neighbor ip addresses are not on
directly connected interfaces.
the static route is required because otherwise, the router has no clue where
to send packets destined for the BGP neighbor. ( I've been told
and route tables:
3640-NAS Config:
interface Loopback0
ip address 192.168.200.254 255.255.255.0
!
interface Ethernet0/0
ip address 216.199.175.12 255.255.255.224
!
interface Group-Async1
ip unnumbered Loopback0
peer default ip address pool PRIVATE
!
router eigrp 10
network 192.168.1.0
network 192.168.200.0
? Below are my configs and route tables:
3640-NAS Config:
interface Loopback0
ip address 192.168.200.254 255.255.255.0
!
interface Ethernet0/0
ip address 216.199.175.12 255.255.255.224
!
interface Group-Async1
ip unnumbered Loopback0
peer default ip address pool PRIVATE
!
router eigrp 10
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
trying to conserve IP
of 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 Inline...
- Original Message -
From: Tunji Suleiman
address 192.168.200.254 255.255.255.0
!
interface Ethernet0/0
ip address 216.199.175.12 255.255.255.224
!
interface Group-Async1
ip unnumbered Loopback0
peer default ip address pool PRIVATE
!
router eigrp 10
network 192.168.1.0
network 192.168.200.0
network 216.199.175.0
no auto-summary
!
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 Loopback [7:50581]
Thanks Ciaron and Nigel, I removed the route
255.255.255.0
!
interface Ethernet0/0
ip address 216.199.175.12 255.255.255.224
!
interface Group-Async1
ip unnumbered Loopback0
peer default ip address pool PRIVATE
!
router eigrp 10
network 192.168.1.0
network 192.168.200.0
network 216.199.175.0
no auto-summary
!
ip local pool PRIVATE 192.168.200.41
This will work, we have many routers configured with the serial link (going
to ISP) as ip unnumbered ethernet 0/0. The only additional command you will
need is crypto map rtp local-address FastEthernet0/0
Doug
-Original Message-
From: Firesox [mailto:[EMAIL PROTECTED]]
Sent: Thursday
configure IP unnumbered ethernet0 or
loopback0 (with one of them having a routable IP address) and so I must
configure ppp encap on the serial ??
I am a bit confused, thx for your help !!
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=48894t=48894
to
them.
them: ip route your public space out interface X
You: ip route 0.0.0.0 0.0.0.0 interface Y
this is a regular practice.
IP unnumbered is even better, because then no one has to commit to or agree
upon address, and no one has to waste public space.
Usually, you would number your ethernet
You can use ip unnumbered with or without PPP, depending on how your
provider is set up. You would just use ip unnumbered to the ethernet port
or to a loopback interface, whichever you prefer, I prefer the loopback.
*-Original Message-
*From: richard dumoulin [mailto:[EMAIL PROTECTED
, and you in turn are using a static
route to
them.
them: ip route your public space out interface X
You: ip route 0.0.0.0 0.0.0.0 interface Y
this is a regular practice.
IP unnumbered is even better, because then no one has to commit
to or agree
upon address, and no one has to waste
Comments inline:
*-Original Message-
*From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]]
*Sent: Tuesday, July 16, 2002 1:32 PM
*To: [EMAIL PROTECTED]
*Subject: Re: ip unnumbered [7:48894]
*
*
*Chuck wrote:
*
* recall that the link between you and whomever is a two host
* network
Depending what your provider is selling you,
If the provider offers you an IP address for the WAN take, it as it makes
things easier to troubleshoot.
You usually use IP unnumbered on point to point links where the traffic
doesn't need to use the address because it is point to point and can
Hi Chuck
Could you explain the statement : Usually, you would number your ethernet
port with a public number, and you
would use an ip unnumbered off that publicly addressed interface. -
Normally we number the port with private address I am not sure what you mean
by public number here!!! Just
to-point
description 192K CIR PVC to Perth
mtu 800
bandwidth 192
ip unnumbered Ethernet0/0
ip inspect corp in
no ip directed-broadcast
backup delay 5 10
backup interface Dialer0
frame-relay de-group 1 17
frame-relay interface-dlci 17
frame-relay payload-compression packet-b
16 interface Serial1/1 16
frame-relay route 20 interface Serial1/1 20
frame-relay route 22 interface Serial1/1 22
!
interface Serial1/0.1 point-to-point
description 192K CIR PVC to Head Office
mtu 800
backup delay 5 10
backup interface Dialer0
ip unnumbered Ethernet0/0
ip inspect firewall
.1 point-to-point
description 192K CIR PVC to Head Office
mtu 800
backup delay 5 10
backup interface Dialer0
ip unnumbered Ethernet0/0
ip inspect firewall in
bandwidth 192
frame-relay de-group 1 17
frame-relay interface-dlci 17
frame-relay payload-compression packet-by-packet
Serial1/1 16
frame-relay route 20 interface Serial1/1 20
frame-relay route 22 interface Serial1/1 22
!
interface Serial1/0.1 point-to-point
description 192K CIR PVC to Perth
mtu 800
bandwidth 192
ip unnumbered Ethernet0/0
ip inspect corp in
no ip directed-broadcast
backup delay 5 10
backup
Relay service to head office on interface Serial 0/0 and is
currently ip unnmbered to the E0/0 interface.
Using CBAC I cannot get the ip inspect stuff to work and I suspect either
1. the code 12.0(3)T FFS
2. IP unnumbered
Q. Any one done this before?
Regards
Dennis Cooper
Lab date 13/08/2002
the code 12.0(3)T FFS
2. IP unnumbered
Q. Any one done this before?
Regards
Dennis Cooper
Lab date 13/08/2002 (but who's counting)
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=48723t=48721
--
FAQ, list archives, and subs
Does anyone know how to configure IPsec Tunnel to terminate at an IP Address
that is confiugred with ip unnumbered command?
Serial 0/0 is using ip unnumbred f0/0 on 2621 router.
IPSec doesn't seem to like the ip unnumbered interface or the loopback as
its termination point
I am trying
It's not yet supported to terminate IPSec tunnels on a unnumbered Interface.
-Antonio
Firesox wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Does anyone know how to configure IPsec Tunnel to terminate at an IP
Address
that is confiugred with ip unnumbered command?
Se
to the internet and has ip unnumbered from
ethernet interface.
when I try to create IPSec tunnel using the crypto map command to s0/0
interface, I cannot connect to the remote site.
After some debugging, it seems as if the IPSec tunnel is being created
because the S0/0 interface has ip unnumbered command
want to open a TAC case for assistance.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Firesox
Sent: Thursday, June 27, 2002 9:09 PM
To: [EMAIL PROTECTED]
Subject: IPSec to the tunnel endpoint withr IP unnumbered interface
[7:47622]
Folks,
I need some help
Not sure what you're asking there?
The address you're going to is within your Ethernet subnet. Traceroute
shouldn't take too long (no hops).
I take it you mean this is the remote router.
I take it you made that config up (typos and all :-) ). Paste the real
thing for both ends.
What does
Hi,
I am facing a problem .That is i have use ip unnubered command on my
router.But i am not able to traceroute my next hop but i am able to
ping that next hop.Here is the conf
int e0/0
ip address 216.252.243.181 255.255.255.240
full duplex
!
!
int s0/0
ip address 192.168.5.2 255.255.255.252
.
so check for configs there.
A simple example would be something like:
int s0
ip unnumbered e0
You are telling the router to use e0's address for the serial link. Now one
would think that this would not work, because the ethernet interfaces on two
routers usually will not have ip addresses
You tie your serial (generally) to a LAN or loopback interface instead
of giving the serial interface it's own address. For this scenerio just
don't do it, need addresses, see RFC 1918.
Dave
birdy wrote:
Dear all
can anyone tell me what is IP unnumbered ?
Regards, birdy
--
David
I think a lot of the ISPs are doing this for the smaller customers..
For example, we put in on the side, an internet router for a small law firm
using MCI and instead of giving us an address for the
serial interface, they wanted me to ip unnumber it from ethernet port.
Saves them some ip
Dear all
can anyone tell me what is IP unnumbered ?
Regards, birdy
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=21794t=21794
--
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report
The Loopback Interface is useful in OSPF, BGP, for network management. If
a loopback will have 2-3 uses anyway, why not throw in ip unnumbered.
If someone is dead set against loopback, you could use
interface serial 0/0
ip unnumbered
interface ethernet 0/0
ip address 10.1.1.1 255.255.255.0
Interface is useful in OSPF, BGP, for network management. If
a loopback will have 2-3 uses anyway, why not throw in ip unnumbered.
If someone is dead set against loopback, you could use
interface serial 0/0
ip unnumbered
interface ethernet 0/0
ip address 10.1.1.1 255.255.255.0
no keepalive
Hi
Instead of using a numbered link you can use ip unnumbered to connect
sites.
Example:
Router A:
interface fastethernet 0
ip address 10.100.2.1 255.255.255.0
interface serial 0
ip unnumbered fasthethernet 0
Router B:
interface fastethernet 0
ip address 10.100.31 255.255.255.0
Brett gives a good example that will work just fine but I would not
recommend using IP unnumbered. With RFC 1918 you have more IP addesses
than your going to need so no problems with using registered addresses
on p-to-p links. troubleshooting also becomes trickier but if you
insist on using
Dave,
I agree totally with your statement, however, I don't understand why you say
that if you use ip unnumbered pointing to a LoopBack interface that
nullifies the point of using unnumbered (to save IPs). You can still use a
single IP address on a LoopBack not waste more by putting separate
At this point, it think it would be good to mention that (IMHO) it's best to
use the LoopBack interface for ip unnumbered because it can never go
down..
In the config snipet you gave, your Serial0 couldn't communicate if
FastEthernet0 went down.
I do believe that with some version of 12.x
Agree, you don't use as many address with LB's as p-to-p networks but
the primary point I was trying to make before I rambled is that there is
really no good reason IMHO to ip unnumbered.
Dave
Michael L. Williams wrote:
Dave,
I agree totally with your statement, however, I don't
Hello everybody,
I know how to cinfigure IP unumbered but I do not know
any practical scenario that I make use of this
feature.Any body has specific scanrios where I can
use ip unnumbered .
Regards ,
sami
__
Do You Yahoo!?
Get email alerts NEW
Sure, IP unnumbered is frequently used by ISP's to save address space and
for ease of configuration. Lets say you have a 7513 with 280 T1 customers
on it, that would mean wasting 280 /30 IP blocks just on interface transit,
so why use those IP's if you don't have a specific reason
practical scenario that I make use of this
feature.Any body has specific scanrios where I can
use ip unnumbered .
Regards ,
sami
[snip]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7i=18257t=18250
--
FAQ, list archives
you might use it if you had say an access-server
e.g you got group-async 1 and group-async
the router wont let you do 'ip address 10.0.0.1 255.0.0.0 on both interfaces
so instead you would assign 10.0.0.1 to loopback 0
and then in group-async 1 2
ip unnumbered loopback 0
thus giving them both
anything, nd don't have to go
renumbering any interfaces either.
Brian
On Sun, 2 Sep 2001, Lupi, Guy wrote:
Sure, IP unnumbered is frequently used by ISP's to save address space and
for ease of configuration. Lets say you have a 7513 with 280 T1 customers
on it, that would mean wasting 280 /30 IP
Greetings all,
Can you guys share any disadvantages to ip unnumbered.
Thanks,
Nabil
_
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Suite 500
Houston, TX 77056
-Original Message-
From: Nabil Fares [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 19, 2001 11:41 AM
To: [EMAIL PROTECTED]
Subject: IP unnumbered
Greetings all,
Can you guys share any disadvantages to ip unnumbered
Houston, TX 77056
-Original Message-
From: Nabil Fares [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 19, 2001 11:41 AM
To: [EMAIL PROTECTED]
Subject: IP unnumbered
Greetings all,
Can you guys share any disadvantages to ip unnumbered.
Thanks,
Nabil
At 02:15 PM 2/26/01, nobody wrote:
Is the below a dumb question?
No.
Nobody replied. Can somebody enlighten me? ;-)
p.
- Original Message -
From: "nobody" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, February 23, 2001 2:07 PM
Subject: need clarification: ip
ten me? ;-)
p.
- Original Message -
From: "nobody" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, February 23, 2001 2:07 PM
Subject: need clarification: ip unnumbered in routing tables
just need to verify my thinking:
example: serial line (PPP) connection b
If you are using ip unnumbered,then there is no need to assign IP addresses
to the serial interfaces of Routers A and B.
You could do:
RouterA#show run
and check the listings that follows the serial 0/0. If there is an assigned
IP address, then you have not correctly configured the ip
Priscilla,
just need to verify my thinking:
example: serial line (PPP) connection between routers A and B using ip
unnumbered.
router A:
e0=192.168.1.1/24
s0=192.168.3.1/24
Why does s0 have an address if it's unnumbered?
Good catch. I did not even notice it ;-(
Seems
just need to verify my thinking:
example: serial line (PPP) connection between routers A and B using ip
unnumbered.
router A:
e0=192.168.1.1/24
s0=192.168.3.1/24
routing table for A:
c192.168.1.0/24is directly connected, ethernet0
r192.168.2.0/24[120/1] via 192.168.3.2, 00:00
.
I have set up OSPF with IP unnumbered, and it worked just fine.
Pamela
At 02:07 AM 2/1/01 -0500, Tom Pruneau wrote:
Greetings Karl
I can't remember exactly where I read that , but I did. More specifically
you can't have ip unnumbered on an interface running OSPF because there is
no address
01, 2001 3:45 PM
To: Pamela Forsyth; [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: RE: IP unnumbered and OSPF
From the Cisco Press book:
"When an unnumbered interface is configured, it references another interface
... When enabling OSPF on the unnumbered int with the network command
I guess you could do that too...
-Original Message-
From: Montgomery, Robert WARCOM Contractor
[mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 01, 2001 2:36 PM
To: Karl R. West; [EMAIL PROTECTED]
Subject: RE: IP unnumbered and OSPF
Why wouldn't you just use wildcards to indicated
Greetings Karl
I can't remember exactly where I read that , but I did. More specifically
you can't have ip unnumbered on an interface running OSPF because there is
no address to be neighbors with.
If what you want to do is have a router with some ospf interfaces and some
other interface
Thanks, I thought so too but someone pointed me to this link
http://www.cisco.com/warp/public/104/ospfdb1.html
-Original Message-
From: Tom Pruneau [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 01, 2001 2:08 AM
To: Karl R. West; [EMAIL PROTECTED]
Subject: Re: IP unnumbered
Why wouldn't you just use wildcards to indicated the exact interface(s)?
-Original Message-
From: Karl R. West [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 01, 2001 11:23 AM
To: 'Tom Pruneau'; [EMAIL PROTECTED]
Subject: RE: IP unnumbered and OSPF
Thanks, I thought so too
nting."
-Original Message-
From: Pamela Forsyth [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 01, 2001 1:07 PM
To: [EMAIL PROTECTED]
Subject: Re: IP unnumbered and OSPF
Karl, Tom,
I think you are both mistaken--in fact, RFC 2328 contains multiple
references to unnumbered point-to-p
Ip unnumbered can be used on OSPF running routers.U can refer this with the cisco link
http://www.cisco.com/warp/public/104/ospfdb1.html.
Regards
N.Anand
- Original Message --
"Montgomery, Robert WARCOM Contractor" [EMAIL PROTECTED] wrote:
To:Pamela Fors
Refresh me please...
I remember reading some where why you should not have IP UNNUMBERED running
on the router your going to put OSPF on.
Can some one refresh my memory.
Regards,
Karl
_
FAQ, list archives, and subscription info: http://www.groupstudy.com/list
: [EMAIL PROTECTED] (bcc: JENNY
MCLEOD/NSO/CSDA)
Subject: Re: IP Unnumbered.
There is one huge disadvantage. If the ether
segment goes down in an ip
unnumbered setup, then even if everything is
physically ok on the serial
link associated, that serial link will become
unusable
Advisable to use it over a point to point Links.
Thangavel
- Original Message -
From: Brian [EMAIL PROTECTED]
To: Erick B. [EMAIL PROTECTED]
Cc: Gunjan Mathur at 9netave [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Monday, October 16, 2000 5:41 PM
Subject: Re: IP Unnumbered.
unnumbered
Hi,
Can somebody tell me Advantages disadvantages of
IP unnumbered system.
TIA
Gm.
Hi,
Can somebody tell me Advantages disadvantages of
IP unnumbered system.
TIA
Gm.
.
With
ip unnumbered, we can not route
properly from the ethernet to the CAN.
When
we put a bona fide subnet on
the
serial ports, we can route to the CAN.
We
haven't tried it with the 3000 on a higher
level
IOS, because it would have to boot
from a
tftp server, and we haven't taken
the
time to set
Ip unnumbered preserves IP addresses. It
allows a port to "borrow" an IP address from another Port on the same device.
(usually the Loopback, can be any, but Loopback stays "up")
It's great for point to point connections.
ISDN , Frame Relay etc..
Jon
disadvantages of
IP unnumbered system.
__
Do You Yahoo!?
Yahoo! Messenger - Talk while you surf! It's FREE.
http://im.yahoo.com/
_
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
believe that is not the case.
Anyone else?
Original Message Follows
From: "Ray Mosely" [EMAIL PROTECTED]
Reply-To: "Ray Mosely" [EMAIL PROTECTED]
To: "net974 at Yahoo" [EMAIL PROTECTED], [EMAIL PROTECTED]
Subject: RE: IP Unnumbered.
Date: Mon, 16 Oct 2000 10:21:
There is one huge disadvantage. If the ether segment goes down in an ip
unnumbered setup, then even if everything is physically ok on the serial
link associated, that serial link will become unusable. From a monitoring
perspective, unnumbered is a bad idea. I suspect some people use it to
save
interface to see if it's
down, etc.
--- Gunjan Mathur at 9netave [EMAIL PROTECTED]
wrote:
Hi,
Can somebody tell me Advantages disadvantages of
IP unnumbered system.
__
Do You Yahoo!?
Yahoo! Messenger - Talk while you surf! It's
ot; [EMAIL PROTECTED]
To: Gunjan Mathur at 9netave [EMAIL PROTECTED]
cc: [EMAIL PROTECTED] (bcc: JENNY MCLEOD/NSO/CSDA)
Subject: Re: IP Unnumbered.
There is one huge disadvantage. If the ether segment goes down in an ip
unnumbered setup, then even if everything is physically ok on the se
Thanks Ms. Jenny. I was wondering whether loopback was an option. The
numbering of the Unumbered was getting to me. :)
Dale CCNA
Original Message Follows
From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: IP Unnumbered.
Date: Tue, 17 Oct 2000 11:25:13
There is one huge disadvantage. If the ether segment goes down in an ip
unnumbered setup, then even if everything is physically ok on the serial
link associated, that serial link will become unusable. From a monitoring
perspective, unnumbered is a bad idea. I suspect some people use it to
save
is configured for frame
relay as a point-to-point subinterface. There is an ip unnumbered
Ethernet0/0 command for this interface and also the frame relay
configuration is set (dlci #, lmi type etc)
What does this ip unnumbered do in this case?
Pg. 417 and 418 of the ICRC book from Cisco Press for CCNA
). This
cuts down the the number of IP subnets and routing table size
used in a network.
Hope this helps?
Dan
From: "Niraj Palikhey" [EMAIL PROTECTED]
Reply-To: "Niraj Palikhey" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: ip unnumbered??
Date: Wed, 19 Jul 2000 10:18:06
only go one place..the other end of the pipe.
IP Unnumbered can be use.
As a configuration example that one of my friends showed me, his serial 0 is
configured for T1, with no ip address, serial 0.2 is configured for frame
relay as a point-to-point subinterface. There is an ip
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Justin Marcus
Sent: Wednesday, June 07, 2000 4:41 PM
To: ALI SHEERAZ
Cc: [EMAIL PROTECTED]
Subject: Re: ip unnumbered
if your ethernet0 is 10.0.0.1
and you make your serial0 have
1 - 100 of 111 matches
Mail list logo
