From: Eric Poulin (epoulins@yahoo.com)
Date: Wed Jun 20 2007 - 20:16:41 ART
Looks like it's a bug in 12.4(10a). I just tried 12.3.22 and it works fine, I can change
the distance on any routes.
Thanks for all your help,
Eric
--- Antonio Soares <amsoares@netcabo.pt> wrote:
> Eric,
>
> Have you tried another IOS release in the meanwhile ? The routers i used in
> the test are running 12.3.20 Enterprise Basic.
>
> Regards,
> Antonio
>
> _____
>
> From: Narbik Kocharians [mailto:narbikk@gmail.com]
> Sent: quarta-feira, 20 de Junho de 2007 15:26
> To: Tarun Pahuja
> Cc: Antonio Soares; Eric Poulin; Marvin Greenlee; ccielab@groupstudy.com
> Subject: Re: I can't get the "distance <distance> <router-id> <acl>" to work
> in OSPF with multiple equal cost routes.
>
>
> Tarun,
>
> I think they are all aware of that.
>
>
> On 6/20/07, Tarun Pahuja <pahujat@gmail.com> wrote:
>
> Eric,
> The Source in the OSPF distance command should be the RID of the
> preferred ABR in your case.
>
> HTH,
> Tarun Pahuja
> CCIE#7707(R&S,Security,SP,Voice,Storage),CCSI
>
> On 6/20/07, Antonio Soares <amsoares@netcabo.pt> wrote:
> >
> > Yes, it seems a Bug. Here's what i got:
> >
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > R3#sh ip route ospf
> > 1.0.0.0/32 is subnetted, 1 subnets
> > O IA 1.1.1.1 <http://1.1.1.1> [110/782] via 13.13.13.1, 00:00:07,
> Serial1/2
> > 2.0.0.0/32 is subnetted, 1 subnets
> > O IA 2.2.2.2 [110/782] via 23.23.23.2, 00:00:07, Serial1/3
> > 12.0.0.0/24 is subnetted, 1 subnets
> > O IA 12.12.12.0 [110/791] via 13.13.13.1, 00:00:07, Serial1/2
> > [110/791] via 23.23.23.2, 00:00:07, Serial1/3
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > R3#sh ip ospf data
> >
> > OSPF Router with ID (3.3.3.3) (Process ID 1)
> >
> > Router Link States (Area 0)
> >
> > Link ID ADV Router Age Seq# Checksum Link count
>
> > 1.1.1.1 1.1.1.1 366 0x80000005 0x004EED 2
> > 2.2.2.2 2.2.2.2 334 0x80000002 0x00D920 2
> > 3.3.3.3 3.3.3.3 334 0x80000004 0x00912F 4
> >
> > Summary Net Link States (Area 0)
> >
> > Link ID ADV Router Age Seq# Checksum
> > 1.1.1.1 1.1.1.1 512 0x80000001 0x0047EC
> > 1.1.1.1 2.2.2.2 335 0x80000001 0x008D98
> > 2.2.2.2 1.1.1.1 512 0x80000001 0x007DA8
> > 2.2.2.2 2.2.2.2 335 0x80000001 0x00FA31
> > 12.12.12.0 1.1.1.1 512 0x80000001 0x001EEC
> > 12.12.12.0 2.2.2.2 335 0x80000001 0x00FF07
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > R3#conf t
> > Enter configuration commands, one per line. End with CNTL/Z.
> > R3(config)#router ospf 1
> > R3(config-router)# distance 101 1.1.1.1 0.0.0.0
> > R3(config-router)#end
> > R3#
> > *Mar 1 00:25:19.358: %SYS-5-CONFIG_I: Configured from console by console
> > R3#
> > R3#sh ip route ospf
> > 1.0.0.0/32 <http://1.0.0.0/32> is subnetted, 1 subnets
> > O IA 1.1.1.1 [101/782] via 13.13.13.1, 00:00:06, Serial1/2
> > 2.0.0.0/32 is subnetted, 1 subnets
> > O IA 2.2.2.2 [101/792] via 13.13.13.1, 00:00:06, Serial1/2
> > 12.0.0.0/24 is subnetted, 1 subnets
> > O IA 12.12.12.0 [101/791] via 13.13.13.1, 00:00:06, Serial1/2
> > R3#
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > R3#
> > R3#conf t
> > Enter configuration commands, one per line. End with CNTL/Z.
> > R3(config)#router ospf 1
> > R3(config-router)#no distance 101 1.1.1.1 0.0.0.0
> > R3(config-router)# distance 102 2.2.2.2 0.0.0.0
> > R3(config-router)#
> > R3(config-router)#end
> > R3#
> > *Mar 1 00:25:37.115 : %SYS-5-CONFIG_I: Configured from console by console
> > R3#sh ip route ospf
> > 1.0.0.0/32 is subnetted, 1 subnets
> > O IA 1.1.1.1 [110/782] via 13.13.13.1, 00:00:03, Serial1/2
> > 2.0.0.0/32 is subnetted, 1 subnets
> > O IA 2.2.2.2 [102/782] via 23.23.23.2, 00:00:03, Serial1/3
> > 12.0.0.0/24 is subnetted, 1 subnets
> > O IA 12.12.12.0 [102/791] via 23.23.23.2 <http://23.23.23.2> ,
> 00:00:03, Serial1/3
> > R3#
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> >
> > -----Original Message-----
> > From: Eric Poulin [mailto: epoulins@yahoo.com <mailto:epoulins@yahoo.com>
> ]
> > Sent: terga-feira, 19 de Junho de 2007 23:45
> > To: Marvin Greenlee; Antonio Soares; ccielab@groupstudy.com
> > Subject: RE: I can't get the "distance <distance> <router-id> <acl>" to
> > work
> > in OSPF with multiple equal cost routes.
> >
> > The 150.1.1.1 and 150.1.2.2 are the advertising routers. Here's the output
> > of show ip ospf database:
> >
> > Rack1R5#sh ip ospf data
> >
> > OSPF Router with ID (150.1.5.5) (Process ID 1)
> >
> > Router Link States (Area 1)
> >
> > Link ID ADV Router Age Seq# Checksum Link count
> > 150.1.1.1 150.1.1.1 1489 0x80000011 0x0013C8 3
> > 150.1.2.2 150.1.2.2 714 0x80000012 0x00EFCF 3
> > 150.1.5.5 150.1.5.5 <http://150.1.5.5> 1709
> 0x8000000B 0x00FFF6 4
> >
> > Summary Net Link States (Area 1)
> >
> > Link ID ADV Router Age Seq# Checksum
> > 139.1.0.0 150.1.1.1 1730 0x8000000A 0x00DBE7
> > 139.1.0.0 150.1.2.2 1712 0x8000000A 0x00CEF2
> > 139.1.2.0 150.1.1.1 1729 0x80000008 0x000DAF
> > 139.1.2.0 150.1.2.2 <http://150.1.2.2> 1712
> 0x8000000A 0x00DB2D
> > 139.1.6.0 150.1.1.1 1730 0x8000000A 0x00A319
> > 139.1.6.0 <http://139.1.6.0> 150.1.2.2 1712
> 0x8000000A 0x009624
> > 139.1.7.0 150.1.1.1 1730 0x8000000A 0x009823
> > 139.1.7.0 150.1.2.2 1712 0x8000000A 0x008B2E
> > 139.1.11.0 150.1.1.1 <http://150.1.1.1> 1730
> 0x8000000A 0x00857C
> > 139.1.11.0 150.1.2.2 1713 0x80000008 0x009C15
> > 139.1.13.0 <http://139.1.13.0> 150.1.1.1 1731
> 0x8000000B 0x00E5D9
> > 139.1.13.0 150.1.2.2 1714 0x8000000A 0x007836
> > 139.1.23.0 150.1.1.1 1732 0x8000000A 0x00178F
> > 139.1.23.0 150.1.2.2 <http://150.1.2.2> 1714
> 0x8000000B 0x006A49
> >
> >
> > --- Marvin Greenlee <marvin@ipexpert.com> wrote:
> >
> > > Looking at the output of show ip ospf database, are the 150.1.1.1 and
> > > 150.1.2.2 the devices that are advertising the routes, or just your
> > > local neighbors?
> > >
> > >
> > >
> > > Marvin Greenlee, CCIE #12237 (R&S, SP, Sec) Senior Technical
> > > Instructor - IPexpert, Inc.
> > > A Cisco Learning Partner - We Accept Learning Credits!
> > > Telephone: +1.810.326.1444
> > > Fax: +1.810.454.0130
> > > Mailto: mgreenlee@ipexpert.com
> > >
> > > IPexpert - The Global Leader in Self-Study, Classroom-Based, Video
> > > Class-On-Demand and Audio Certification Training Tools for the Cisco
> > > CCIE R&S Lab, CCIE Security Lab, CCIE Service Provider Lab, CCIE Voice
> > > Lab and CCIE Storage Lab Certifications.
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > > Of Eric Poulin
> > > Sent: Tuesday, June 19, 2007 4:35 PM
> > > To: ccielab@groupstudy.com
> > > Subject: I can't get the "distance <distance> <router-id> <acl>" to
> > > work in OSPF with multiple equal cost routes.
> > >
> > > Hi GS,
> > >
> > > I don't understand what's going on, but I just can't get the "distance
> > > <distance> <router-id> <acl>" to work in OSPF with multiple equal cost
> > > routes. Here's the output of the routing table without any distance
> > > manipulation:
> > >
> > > Rack1R5#show ip route ospf
> > > 139.1.0.0/16 <http://139.1.0.0/16> is variably subnetted, 14
> subnets, 2 masks
> > > O IA 139.1.11.0/24 [110/65] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.13.0/24 <http://139.1.13.0/24> [110/128] via 139.1.15.1,
> 00:11:27, Serial0/0.15
> > > O IA 139.1.2.0/24 [110/65] via 139.1.25.2 , 00:11:27, Serial0/0.25
> > > O IA 139.1.0.0/24 [110/138] via 139.1.25.2, 00:11:27, Serial0/0.25
> > > [110/138] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.6.0/24 [110/139] via 139.1.25.2, 00:11:27, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.7.0/24 [110/139] via 139.1.25.2, 00:11:27, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.23.0/24 [110/128] via 139.1.25.2, 00:11:27, Serial0/0.25
> > >
> > > As you can see, I have a single route to network 11, 13 and 2 and two
> > > equal-cost routes to network 0, 6, 7 and 23. Routes are learned either
> > > via 139.1.15.1 (RID
> > > 150.1.1.1) or
> > > 139.1.25.2 (RID 150.1.2.2). Under the OSPF process, if I manipulate
> > > the distance of network 11, 13 or 2 which I only have a single route,
> > > everything works fine and I can change distance to whatever I want.
> > > Here's an example:
> > >
> > > router ospf 1
> > > distance 109 150.1.1.1 0.0.0.0 VLAN13
> > >
> > > ip access-list standard VLAN13
> > > permit 139.1.13.0 <http://139.1.13.0>
> > >
> > > Rack1R5#show ip route ospf
> > > 139.1.0.0/16 is variably subnetted, 14 subnets, 2 masks
> > > O IA 139.1.11.0/24 <http://139.1.11.0/24> [110/65] via 139.1.15.1,
> 00:11:27, Serial0/0.15
> > > O IA 139.1.13.0/24 [109/128] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.2.0/24 [110/65] via 139.1.25.2, 00:11:27, Serial0/0.25
> > > O IA 139.1.0.0/24 [110/138] via 139.1.25.2, 00:11:27, Serial0/0.25
> > > [110/138] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA <http://139.1.6.0/24> 139.1.6.0/24 [110/139] via 139.1.25.2,
> 00:11:27, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.7.0/24 [110/139] via 139.1.25.2, 00:11:27, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:11:27, Serial0/0.15
> > > O IA 139.1.23.0/24 [110/128] via 139.1.25.2, 00:11:27, Serial0/0.25
> > >
> > >
> > > Now here's the bug, if I try changing the distance of any equal-cost
> > > routes, it does not work. Here's an example:
> > >
> > > router ospf 1
> > > distance 109 150.1.1.1 0.0.0.0 VIA_R1
> > >
> > > ip access-list standard VIA_R1
> > > permit 139.1.6.0
> > > permit 139.1.7.0
> > >
> > > Rack1R5#show ip route ospf
> > > 139.1.0.0/16 is variably subnetted, 14 subnets, 2 masks
> > > O IA 139.1.11.0/24 [110/65] via 139.1.15.1 <http://139.1.15.1> ,
> 00:00:11, Serial0/0.15
> > > O IA 139.1.13.0/24 [110/128] via 139.1.15.1, 00:00:11, Serial0/0.15
> > > O IA 139.1.2.0/24 <http://139.1.2.0/24> [110/65] via 139.1.25.2,
> 00:00:11, Serial0/0.25
> > > O IA 139.1.0.0/24 [110/138] via 139.1.25.2 , 00:00:11, Serial0/0.25
> > > [110/138] via 139.1.15.1, 00:00:11, Serial0/0.15
> > > O IA 139.1.6.0/24 [110/139] via 139.1.25.2, 00:00:11, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:00:11, Serial0/0.15
> > > O IA <http://139.1.7.0/24> 139.1.7.0/24 [110/139] via 139.1.25.2,
> 00:00:11, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:00:11, Serial0/0.15
> > > O IA 139.1.23.0/24 [110/128] via 139.1.25.2, 00:00:11, Serial0/0.25
> > >
> > >
> > > After seeing that, I decided to eliminate the access-list and see what
> > > happens when I change the distance for all routes learned from
> > > 150.1.1.1:
> > >
> > > router ospf 1
> > > distance 109 150.1.1.1 0.0.0.0
> > >
> > > Rack1R5#show ip route ospf
> > > 139.1.0.0/16 is variably subnetted, 14 subnets, 2 masks
> > > O IA 139.1.11.0/24 [109/65] via 139.1.15.1, 00:05:06, Serial0/0.15
> > > O IA 139.1.13.0/24 [109/128] via 139.1.15.1, 00:05:06, Serial0/0.15
> > > O IA 139.1.2.0/24 [110/65] via 139.1.25.2, 00:05:06, Serial0/0.25
> > > O IA 139.1.0.0/24 <http://139.1.0.0/24> [110/138] via 139.1.25.2,
> 00:05:06, Serial0/0.25
> > > [110/138] via 139.1.15.1, 00:05:06, Serial0/0.15
> > > O IA 139.1.6.0/24 [110/139] via 139.1.25.2, 00:05:06, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:05:06, Serial0/0.15
> > > O IA 139.1.7.0/24 [110/139] via 139.1.25.2, 00:05:06, Serial0/0.25
> > > [110/139] via 139.1.15.1, 00:05:06, Serial0/0.15
> > > O IA 139.1.23.0/24 [110/128] via 139.1.25.2, 00:05:06, Serial0/0.25
> > >
> > > None of the equal-cost routes changed, only the single route. This is
> > > a very strange behavior, and I don't understand why. Can anyone
> > > explain me why this is occuring?
> > >
> > > Thanks for your input,
> > > Eric
> > >
> > >
> > >
> > > ______________________________________________________________________
> > > ______
> > > ________
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> >
> >
> >
> >
> >
> >
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>
>
> --
> Narbik Kocharians
> CCIE# 12410 (R&S, SP, Security)
> CCSI# 30832
>
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