RE: Sanity Check - Redistributing BGP into an IGP [7:66018]
Hi Chuck, I don't know what scenario you are working on, so its hard to give a specific answer. It might be that you ran into the issue that by default I-BGP learned routes are NOT redistributed unless you use the command below. (E-BGP routes are redistributed without it !!) bgp redistribute-internal To allow the redistribution of internal Border Gateway Protocol (iBGP) routes into an Interior Gateway Protocol (IGP) such as Intermediate System-to-Intermediate System (IS-IS) or Open Shortest Path First (OSPF), use the bgp redistribute-internal command in address family configuration mode. To restore the system to the default condition, use the no form of this command. bgp redistribute-internal no bgp redistribute-internal But this also needed for EIGRP, so it might not apply to your scenario as you say that it works with EIGRP. Cheers, Willy -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of The Long and Winding Road Sent: zondag 23 maart 2003 8:38 To: [EMAIL PROTECTED] Subject: Sanity Check - Redistributing BGP into an IGP [7:66018] Yes I know it's not a bright idea ;-> I'm working on a practice lab which appears to me to be poorly written. Some of the solutions are out of left field, but I suppose that's to be expected of CCIE practice labs. Question - redistribution of BGP into OSPF? Problematic? Impossible on a Cisco router? I checked TAC and found the docs on OSPF into BGP writings. But nothing the other way around. I am unable to successfully redistribute BGP into OSPF, although it works just fine if I redistribute BGP into EIGRP, for example. The command takes. All the proper switches are there. But no route in OSPF or in the OSPF database. Incidentally, the "book" solution to this lab is to manually place the particular interface into the OSPF process with a network statement, in addition to placing it manually into the BGP process with a network / mask statement. What am I missing that I can't seem to find on TAC? Thanks. -- TANSTAAFL "there ain't no such thing as a free lunch" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66024&t=66018 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Sanity Check - Redistributing BGP into an IGP [7:66018]
""The Long and Winding Road"" wrote in message news:[EMAIL PROTECTED] > > I am unable to successfully redistribute BGP into OSPF, although it works > just fine if I redistribute BGP into EIGRP, for example. The command takes. > All the proper switches are there. But no route in OSPF or in the OSPF > database. > Chuck, I quickly mocked this up and I am able to do the BGP into OSPF redistribution. Did you remember to add subnets to the redistribute statement? Andrew Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66032&t=66018 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Sanity Check - Redistributing BGP into an IGP [7:66018]
""Willy Schoots"" wrote in message news:[EMAIL PROTECTED] > Hi Chuck, > > I don't know what scenario you are working on, so its hard to give a > specific answer. > > It might be that you ran into the issue that by default I-BGP learned > routes are NOT redistributed unless you use the command below. (E-BGP > routes are redistributed without it !!) > > bgp redistribute-internal Intersting. I looked up the command, and then checked around CCO fo more info - because it apparently does not work on my routers. The route does not show up in the ospf database, nor is it forwarded through ospf. I tried this on two differnt routers after taking a literal reading of the command. R3--OSPF--R1-BGP---eBGP_domain |-iBGP---| I tried it both ways - on R3, and on R1. In neither case does the route in question appear in the ospf database, indicating to me that my humble 25xx routers do not seem to recognize this process. Maybe this is permitted only on the big boys? Maybe I need a different IOS? The routers in question or doing, I believe IP Plus, 12.1.5T10 and 12.2.12a. the later router has to be reloaded quite a lot. It is very flaky. The "book" answer is to add the route to ospf using a network statement. Doing that, it works fine. One of the current crop of Cisco ASET labs. Not a very well written lab IMHO. It's the kind of lab that turns you into a proctor pest. thanks. > > To allow the redistribution of internal Border Gateway Protocol (iBGP) > routes into an Interior Gateway Protocol (IGP) such as Intermediate > System-to-Intermediate System (IS-IS) or Open Shortest Path First > (OSPF), use the bgp redistribute-internal command in address family > configuration mode. To restore the system to the default condition, use > the no form of this command. > > bgp redistribute-internal > no bgp redistribute-internal > > But this also needed for EIGRP, so it might not apply to your scenario > as you say that it works with EIGRP. > > Cheers, > > Willy > > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > The Long and Winding Road > Sent: zondag 23 maart 2003 8:38 > To: [EMAIL PROTECTED] > Subject: Sanity Check - Redistributing BGP into an IGP [7:66018] > > Yes I know it's not a bright idea ;-> > > I'm working on a practice lab which appears to me to be poorly written. > Some > of the solutions are out of left field, but I suppose that's to be > expected > of CCIE practice labs. > > Question - redistribution of BGP into OSPF? Problematic? Impossible on a > Cisco router? > > I checked TAC and found the docs on OSPF into BGP writings. But nothing > the > other way around. > > I am unable to successfully redistribute BGP into OSPF, although it > works > just fine if I redistribute BGP into EIGRP, for example. The command > takes. > All the proper switches are there. But no route in OSPF or in the OSPF > database. > > Incidentally, the "book" solution to this lab is to manually place the > particular interface into the OSPF process with a network statement, in > addition to placing it manually into the BGP process with a network / > mask > statement. > > What am I missing that I can't seem to find on TAC? > > Thanks. > > -- > TANSTAAFL > "there ain't no such thing as a free lunch" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66034&t=66018 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Sanity Check - Redistributing BGP into an IGP [7:66018]
Hi Chuck, The command does work on 2500's, I used IOS 12.2(13)T. I did a clear ip bgp when using the command. bb#sh ver Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2500-IS-L), Version 12.2(13)T, RELEASE SOFTWARE (fc1) TAC Support: http://www.cisco.com/tac Copyright (c) 1986-2002 by cisco Systems, Inc. Compiled Sat 16-Nov-02 07:47 by ccai Image text-base: 0x0307A6E8, data-base: 0x1000 ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE BOOTLDR: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1) bb uptime is 15 hours, 0 minutes System returned to ROM by power-on System image file is "flash:/c2500-is-l.122-13.T" cisco 2511 (68030) processor (revision L) with 14336K/2048K bytes of memory. Processor board ID 02361575, with hardware revision Bridging software. X.25 software, Version 3.0.0. 1 Ethernet/IEEE 802.3 interface(s) 2 Serial network interface(s) 16 terminal line(s) 32K bytes of non-volatile configuration memory. 16384K bytes of processor board System flash (Read ONLY) Cheers, Willy -Original Message- From: Willy Schoots [mailto:[EMAIL PROTECTED] Sent: zondag 23 maart 2003 12:30 To: 'The Long and Winding Road'; '[EMAIL PROTECTED]' Subject: RE: Sanity Check - Redistributing BGP into an IGP [7:66018] Hi Chuck, I don't know what scenario you are working on, so its hard to give a specific answer. It might be that you ran into the issue that by default I-BGP learned routes are NOT redistributed unless you use the command below. (E-BGP routes are redistributed without it !!) bgp redistribute-internal To allow the redistribution of internal Border Gateway Protocol (iBGP) routes into an Interior Gateway Protocol (IGP) such as Intermediate System-to-Intermediate System (IS-IS) or Open Shortest Path First (OSPF), use the bgp redistribute-internal command in address family configuration mode. To restore the system to the default condition, use the no form of this command. bgp redistribute-internal no bgp redistribute-internal But this also needed for EIGRP, so it might not apply to your scenario as you say that it works with EIGRP. Cheers, Willy -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of The Long and Winding Road Sent: zondag 23 maart 2003 8:38 To: [EMAIL PROTECTED] Subject: Sanity Check - Redistributing BGP into an IGP [7:66018] Yes I know it's not a bright idea ;-> I'm working on a practice lab which appears to me to be poorly written. Some of the solutions are out of left field, but I suppose that's to be expected of CCIE practice labs. Question - redistribution of BGP into OSPF? Problematic? Impossible on a Cisco router? I checked TAC and found the docs on OSPF into BGP writings. But nothing the other way around. I am unable to successfully redistribute BGP into OSPF, although it works just fine if I redistribute BGP into EIGRP, for example. The command takes. All the proper switches are there. But no route in OSPF or in the OSPF database. Incidentally, the "book" solution to this lab is to manually place the particular interface into the OSPF process with a network statement, in addition to placing it manually into the BGP process with a network / mask statement. What am I missing that I can't seem to find on TAC? Thanks. -- TANSTAAFL "there ain't no such thing as a free lunch" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66037&t=66018 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Sanity Check - Redistributing BGP into an IGP [7:66018]
the rules of this particular lab exercise is that synchronization MUST be enabled. Thus the route has to be in the IGP in order for iBGP to use it. What equipment are you using? What IOS? I'm using 12.1.5T10 and 12.2.12a - IP Plus versions on 25xx routers. Yes, "subnets" is in the command line. Again, the "book" answer is to place the route in question into the OSPF process using the network statement. If I use "no synch" on the various routers I can accomplish the task as well. I suspect this is an IOS/equipment issue Yep - if I try this on one of my 26xx's it works just fine. Thanks to all who responded. Does not bode well for future CCIE Lab prep. -- TANSTAAFL "there ain't no such thing as a free lunch" ""Andrew Cook"" wrote in message news:[EMAIL PROTECTED] > ""The Long and Winding Road"" wrote in > message news:[EMAIL PROTECTED] > > > > I am unable to successfully redistribute BGP into OSPF, although it works > > just fine if I redistribute BGP into EIGRP, for example. The command > takes. > > All the proper switches are there. But no route in OSPF or in the OSPF > > database. > > > Chuck, I quickly mocked this up and I am able to do the BGP into OSPF > redistribution. Did you remember to add subnets to the redistribute > statement? > > Andrew Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66039&t=66018 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
