Re: IP unnumbered and OSPF
Karl, Tom, I think you are both mistaken--in fact, RFC 2328 contains multiple references to unnumbered point-to-point links and what should be done about them when developing an OSPF implementation. The router doesn't need an exact interface IP address on a point-to-point link in order to form a neighbor relationship. All OSPF packets on a point-to-point link are going to be sent to the multicast address 224.0.0.5, and it really doesn't matter what IP address is the source in those packets. The neighboring router is identified by its router ID, not its address on the interface. 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 to be neighbors with. > >If what you want to do is have a router with some ospf interfaces and some >other interface not running ospf, and you want unnumbered on the non-OSPF >interfaces, I think taht would be OK. > >Tom > > > > > >At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: > >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/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP unnumbered and OSPF
Thanks Pamela, I found the same info after a bit of searching on the Cisco site. But I know I read it somewhere, maybe I wasn't paying attention to what I was reading. Karl -Original Message- From: Montgomery, Robert WARCOM Contractor [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 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, use an 'address wildcard-mask' pair that refers to the interface to which the unnumbered interface is pointing." -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-point links and what should be done about them when developing an OSPF implementation. The router doesn't need an exact interface IP address on a point-to-point link in order to form a neighbor relationship. All OSPF packets on a point-to-point link are going to be sent to the multicast address 224.0.0.5, and it really doesn't matter what IP address is the source in those packets. The neighboring router is identified by its router ID, not its address on the interface. 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 to be neighbors with. > >If what you want to do is have a router with some ospf interfaces and some >other interface not running ospf, and you want unnumbered on the non-OSPF >interfaces, I think taht would be OK. > >Tom > > > > > >At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: > >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/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP unnumbered and OSPF
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 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 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 and OSPF 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 not running ospf, and you want unnumbered on the non-OSPF interfaces, I think taht would be OK. Tom At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: >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/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > Tom Pruneau Trainer Network Operations GENUITY 3 Van de Graff Drive Burlington Ma. 01803 24 Hr. Network Operations Center 800-436-8489 If you need to get a hold of me my hours are 7AM-3PM ET Mon-Fri --- This email is composed of 82% post consumer recycled data bits --- "Once in a while you get shown the light in the strangest of places if you look at it right" _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IP unnumbered and OSPF
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 not running ospf, and you want unnumbered on the non-OSPF interfaces, I think taht would be OK. Tom At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: >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/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > Tom Pruneau Trainer Network Operations GENUITY 3 Van de Graff Drive Burlington Ma. 01803 24 Hr. Network Operations Center 800-436-8489 If you need to get a hold of me my hours are 7AM-3PM ET Mon-Fri --- This email is composed of 82% post consumer recycled data bits --- "Once in a while you get shown the light in the strangest of places if you look at it right" _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP unnumbered and OSPF
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 and OSPF 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 not running ospf, and you want unnumbered on the non-OSPF interfaces, I think taht would be OK. Tom At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: >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/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > Tom Pruneau Trainer Network Operations GENUITY 3 Van de Graff Drive Burlington Ma. 01803 24 Hr. Network Operations Center 800-436-8489 If you need to get a hold of me my hours are 7AM-3PM ET Mon-Fri --- This email is composed of 82% post consumer recycled data bits --- "Once in a while you get shown the light in the strangest of places if you look at it right" _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: IP unnumbered and OSPF
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 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 and OSPF 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 not running ospf, and you want unnumbered on the non-OSPF interfaces, I think taht would be OK. Tom At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: >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/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > Tom Pruneau Trainer Network Operations GENUITY 3 Van de Graff Drive Burlington Ma. 01803 24 Hr. Network Operations Center 800-436-8489 If you need to get a hold of me my hours are 7AM-3PM ET Mon-Fri --- This email is composed of 82% post consumer recycled data bits --- "Once in a while you get shown the light in the strangest of places if you look at it right" _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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, use an 'address wildcard-mask' pair that refers to the interface to which the unnumbered interface is pointing." -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-point links and what should be done about them when developing an OSPF implementation. The router doesn't need an exact interface IP address on a point-to-point link in order to form a neighbor relationship. All OSPF packets on a point-to-point link are going to be sent to the multicast address 224.0.0.5, and it really doesn't matter what IP address is the source in those packets. The neighboring router is identified by its router ID, not its address on the interface. 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 to be neighbors with. > >If what you want to do is have a router with some ospf interfaces and some >other interface not running ospf, and you want unnumbered on the non-OSPF >interfaces, I think taht would be OK. > >Tom > > > > > >At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: > >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/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: RE: IP unnumbered and OSPF
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 Forsyth <[EMAIL PROTECTED]>, [EMAIL PROTECTED], [EMAIL PROTECTED] From:"Montgomery, Robert WARCOM Contractor" <[EMAIL PROTECTED]> Date:Thu, 1 Feb 2001 12:45:04 -0800 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, use an 'address wildcard-mask' pair that refers to the interface to which the unnumbered interface is pointing." -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-point links and what should be done about them when developing an OSPF implementation. The router doesn't need an exact interface IP address on a point-to-point link in order to form a neighbor relationship. All OSPF packets on a point-to-point link are going to be sent to the multicast address 224.0.0.5, and it really doesn't matter what IP address is the source in those packets. The neighboring router is identified by its router ID, not its address on the interface. 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 to be neighbors with. > >If what you want to do is have a router with some ospf interfaces and some >other interface not running ospf, and you want unnumbered on the non-OSPF >interfaces, I think taht would be OK. > >Tom > > > > > >At 03:22 PM 01/31/2001 -0500, Karl R. West wrote: > >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/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Chat with your friends as soon as they come online. Get Rediff Bol at http://bol.rediff.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
