Syed, It is always important to remember that when setting OSPF on a router you need to have at least one interface up. If it happens that you have not setuped the Router-ID, that interface IP Address will be the OSPF router-ID.
Router-ID can be any 32-bit address, it does not have to necessarily be the actual IP address of an interface. The router-ID : 232.1.1.1 or 254.100.100.100 or 248.248.248.248 can all be used as Router-ID. Kind Regards, Jowi Nkwe (JM) [email protected] "In Prosperity Our Friends Know Us. In Adversity We Know Our Friends." -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: 17 September 2009 10:54 PM To: [email protected] Subject: CCIE_RS Digest, Vol 44, Issue 86 Send CCIE_RS mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://onlinestudylist.com/mailman/listinfo/ccie_rs or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of CCIE_RS digest..." Today's Topics: 1. OSPF Virtual links setup (Syed Zaidi) 2. Re: OSPF Virtual links setup (Kim Pedersen) 3. Re: OSPF Virtual links setup (Syed Zaidi) 4. Re: OSPF Virtual links setup (Kim Pedersen) 5. Re: OSPF Virtual links setup (Bryan Bartik) 6. Re: OSPF Virtual links setup (Joe Astorino) ---------------------------------------------------------------------- Message: 1 Date: Thu, 17 Sep 2009 23:59:10 +0530 From: Syed Zaidi <[email protected]> Subject: [OSL | CCIE_RS] OSPF Virtual links setup To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="iso-8859-1" Hello! This is about Vlinks in OSPF. While configuring OSPF VL, we configure it between to non area0 ABRs, here I would like to know about this..--> when we actually configure these VLinks we define other ABR's Router-id on both the ABRs... well, what I want to know here is; whether this router-id can be the 32 bit address but NOT an actual interface IP address of any interfaces on both the ABRs? I mean is this setup ok, will it still bring the VIRTUAL LINK up? Waiting for a quick answer ASAP. Regards, Syed -------------- next part -------------- An HTML attachment was scrubbed... URL: http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090917/2bfb 1038/attachment-0001.htm ------------------------------ Message: 2 Date: Thu, 17 Sep 2009 20:32:20 +0200 From: Kim Pedersen <[email protected]> Subject: Re: [OSL | CCIE_RS] OSPF Virtual links setup To: Syed Zaidi <[email protected]> Cc: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi, As far as i know, its purely the router ID, which can be represented as an IP address, but in fact its just a 32bit number. Kim Syed Zaidi wrote: > Hello! > > This is about Vlinks in OSPF. > > While configuring OSPF VL, we configure it between to non area0 ABRs, > here I would like to know about this..--> when we actually configure > these VLinks we define other ABR's Router-id on both the ABRs... well, > what I want to know here is; whether this router-id can be the 32 bit > address but NOT an actual interface IP address of any interfaces on > both the ABRs? I mean is this setup ok, will it still bring the > VIRTUAL LINK up? > > Waiting for a quick answer ASAP. > > Regards, > Syed > > ---------------------------------------------------------------------- -- > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com > -- // Freedom Matters // Follow my progress on: http://kpjungle.wordpress.com ------------------------------ Message: 3 Date: Fri, 18 Sep 2009 00:08:03 +0530 From: Syed Zaidi <[email protected]> Subject: Re: [OSL | CCIE_RS] OSPF Virtual links setup To: Kim Pedersen <[email protected]> Cc: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="iso-8859-1" Thats right it is just a 32 bit address to identify a router in OSPF.. but it is not an IP address. This way I was thinking whether configuring this address as the virtual link peer of the other ABR shall enable to bring the virtual link up? On Fri, Sep 18, 2009 at 12:02 AM, Kim Pedersen <[email protected]> wrote: > Hi, > > As far as i know, its purely the router ID, which can be represented as an > IP address, but in fact its just a 32bit number. > > Kim > > Syed Zaidi wrote: > >> Hello! >> >> This is about Vlinks in OSPF. >> >> While configuring OSPF VL, we configure it between to non area0 ABRs, here >> I would like to know about this..--> when we actually configure these VLinks >> we define other ABR's Router-id on both the ABRs... well, what I want to >> know here is; whether this router-id can be the 32 bit address but NOT an >> actual interface IP address of any interfaces on both the ABRs? I mean is >> this setup ok, will it still bring the VIRTUAL LINK up? >> >> Waiting for a quick answer ASAP. >> >> Regards, >> Syed >> >> ---------------------------------------------------------------------- -- >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> > > -- > > // Freedom Matters > // Follow my progress on: http://kpjungle.wordpress.com > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090918/0c86 b781/attachment-0001.htm ------------------------------ Message: 4 Date: Thu, 17 Sep 2009 20:39:07 +0200 From: Kim Pedersen <[email protected]> Subject: Re: [OSL | CCIE_RS] OSPF Virtual links setup To: Syed Zaidi <[email protected]> Cc: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed I dont see any reason why it wouldnt, it has the router-ID in its OSPF database, and then it should work automagically.. Kim Syed Zaidi wrote: > Thats right it is just a 32 bit address to identify a router in OSPF.. > but it is not an IP address. This way I was thinking whether > configuring this address as the virtual link peer of the other ABR > shall enable to bring the virtual link up? > > > > On Fri, Sep 18, 2009 at 12:02 AM, Kim Pedersen <[email protected] > <mailto:[email protected]>> wrote: > > Hi, > > As far as i know, its purely the router ID, which can be > represented as an IP address, but in fact its just a 32bit number. > > Kim > > Syed Zaidi wrote: > > Hello! > > This is about Vlinks in OSPF. > > While configuring OSPF VL, we configure it between to non > area0 ABRs, here I would like to know about this..--> when we > actually configure these VLinks we define other ABR's > Router-id on both the ABRs... well, what I want to know here > is; whether this router-id can be the 32 bit address but NOT > an actual interface IP address of any interfaces on both the > ABRs? I mean is this setup ok, will it still bring the VIRTUAL > LINK up? > > Waiting for a quick answer ASAP. > > Regards, > Syed > > ---------------------------------------------------------------------- -- > > _______________________________________________ > For more information regarding industry leading CCIE Lab > training, please visit www.ipexpert.com <http://www.ipexpert.com> > > > > -- > > // Freedom Matters > // Follow my progress on: http://kpjungle.wordpress.com > > -- // Freedom Matters // Follow my progress on: http://kpjungle.wordpress.com ------------------------------ Message: 5 Date: Thu, 17 Sep 2009 13:21:09 -0600 From: Bryan Bartik <[email protected]> Subject: Re: [OSL | CCIE_RS] OSPF Virtual links setup To: Kim Pedersen <[email protected]> Cc: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="iso-8859-1" Yep, exactly :-) On Thu, Sep 17, 2009 at 12:39 PM, Kim Pedersen <[email protected]> wrote: > I dont see any reason why it wouldnt, it has the router-ID in its OSPF > database, and then it should work automagically.. > > Kim > > Syed Zaidi wrote: > > Thats right it is just a 32 bit address to identify a router in OSPF.. > > but it is not an IP address. This way I was thinking whether > > configuring this address as the virtual link peer of the other ABR > > shall enable to bring the virtual link up? > > > > > > > > On Fri, Sep 18, 2009 at 12:02 AM, Kim Pedersen <[email protected] > > <mailto:[email protected]>> wrote: > > > > Hi, > > > > As far as i know, its purely the router ID, which can be > > represented as an IP address, but in fact its just a 32bit number. > > > > Kim > > > > Syed Zaidi wrote: > > > > Hello! > > > > This is about Vlinks in OSPF. > > > > While configuring OSPF VL, we configure it between to non > > area0 ABRs, here I would like to know about this..--> when we > > actually configure these VLinks we define other ABR's > > Router-id on both the ABRs... well, what I want to know here > > is; whether this router-id can be the 32 bit address but NOT > > an actual interface IP address of any interfaces on both the > > ABRs? I mean is this setup ok, will it still bring the VIRTUAL > > LINK up? > > > > Waiting for a quick answer ASAP. > > > > Regards, > > Syed > > > > > ---------------------------------------------------------------------- -- > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab > > training, please visit www.ipexpert.com <http://www.ipexpert.com > > > > > > > > > > -- > > > > // Freedom Matters > > // Follow my progress on: http://kpjungle.wordpress.com > > > > > > -- > > // Freedom Matters > // Follow my progress on: http://kpjungle.wordpress.com > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://onlinestudylist.com/pipermail/ccie_rs/attachments/20090917/ab8b a801/attachment-0001.htm ------------------------------ Message: 6 Date: Thu, 17 Sep 2009 16:54:19 -0400 From: Joe Astorino <[email protected]> Subject: Re: [OSL | CCIE_RS] OSPF Virtual links setup To: Bryan Bartik <[email protected]> Cc: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="iso-8859-1" Indeed, indeed. The RID is just a 32-bit number, not an IP address. The RID could be the same 32-bit number as an IP address happens to be, but it is not the same thing. In other words, the RID does not have to be a reachable IP address On Thu, Sep 17, 2009 at 3:21 PM, Bryan Bartik <[email protected]> wrote: > Yep, exactly :-) > > > On Thu, Sep 17, 2009 at 12:39 PM, Kim Pedersen <[email protected]> wrote: > >> I dont see any reason why it wouldnt, it has the router-ID in its OSPF >> database, and then it should work automagically.. >> >> Kim >> >> Syed Zaidi wrote: >> > Thats right it is just a 32 bit address to identify a router in OSPF.. >> > but it is not an IP address. This way I was thinking whether >> > configuring this address as the virtual link peer of the other ABR >> > shall enable to bring the virtual link up? >> > >> > >> > >> > On Fri, Sep 18, 2009 at 12:02 AM, Kim Pedersen <[email protected] >> > <mailto:[email protected]>> wrote: >> > >> > Hi, >> > >> > As far as i know, its purely the router ID, which can be >> > represented as an IP address, but in fact its just a 32bit number. >> > >> > Kim >> > >> > Syed Zaidi wrote: >> > >> > Hello! >> > >> > This is about Vlinks in OSPF. >> > >> > While configuring OSPF VL, we configure it between to non >> > area0 ABRs, here I would like to know about this..--> when we >> > actually configure these VLinks we define other ABR's >> > Router-id on both the ABRs... well, what I want to know here >> > is; whether this router-id can be the 32 bit address but NOT >> > an actual interface IP address of any interfaces on both the >> > ABRs? I mean is this setup ok, will it still bring the VIRTUAL >> > LINK up? >> > >> > Waiting for a quick answer ASAP. >> > >> > Regards, >> > Syed >> > >> > >> ---------------------------------------------------------------------- -- >> > >> > _______________________________________________ >> > For more information regarding industry leading CCIE Lab >> > training, please visit www.ipexpert.com < >> http://www.ipexpert.com> >> > >> > >> > >> > -- >> > >> > // Freedom Matters >> > // Follow my progress on: http://kpjungle.wordpress.com >> > >> > >> >> -- >> >> // Freedom Matters >> // Follow my progress on: http://kpjungle.wordpress.com >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> > > > > -- > Bryan Bartik > CCIE #23707 (R&S), CCNP > Sr. Support Engineer - IPexpert, Inc. > URL: http://www.IPexpert.com > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > -- Regards, Joe Astorino - CCIE #24347 R&S Technical Instructor - IPexpert, Inc. 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