[c-nsp] Redistributing OSPF into another OSPF process

[Saku Ytti]

On (2012-12-10 17:41 +0400), Murat Kaipov wrote:

I've not yet seen justified reason for multiple OSPF process, people try to
use it like VRF or like BGP peer-group, but it does not work like that. It
just adds confusion and complexity.

Proper way to set preference between processes is to use admin-distance.

Sometimes OSPF is used (note this is not example of justified reason) as
one process to CE<->PE and one process to CE<->LAN. Then you'd in primary
CE prefer CE<->PE process and backup  CE would prefer CE<->LAN process.

But I'd really recommend getting rid of two OSPF processes, unless you have
very clear explanation why you must have it.


> Hello guys. 
> 
> I have an issue on my ME3800 with redistributing ospf process into another
> ospf. Not all routes appears on second ospf process.
> 
> This is my config:
> 
>  
> 
> router ospf 1
> 
> router-id 172.24.203.241
> 
> no auto-cost
> 
> area 197 stub
> 
> redistribute static subnets route-map STATIC-OSPF1
> 
> redistribute ospf 65000 subnets
> 
> redistribute bgp 65000
> 
> passive-interface default
> 
> no passive-interface Vlan42
> 
> no passive-interface Vlan63
> 
> no passive-interface Vlan512
> 
> no passive-interface Vlan901
> 
> no passive-interface Vlan1025
> 
> no passive-interface Vlan3327
> 
> no passive-interface GigabitEthernet0/17
> 
> no passive-interface GigabitEthernet0/21
> 
> no passive-interface GigabitEthernet0/24
> 
> default-metric 100
> 
> bfd all-interfaces
> 
>  
> 
> router ospf 65000
> 
> no auto-cost
> 
> redistribute ospf 1 subnets route-map OSPF1-OSPF65000
> 
> passive-interface default
> 
> no passive-interface Vlan101
> 
> no passive-interface Vlan401
> 
>  
> 
> ip route 172.24.0.0 255.255.0.0 172.24.11.97
> 
>  
> 
> route-map STATIC-OSPF1 permit 10
> 
> match ip address prefix-list GLOBAL-VrfPGW-PRIMARY
> 
> set metric 100
> 
>  
> 
> route-map OSPF1-OSPF65000 permit 10
> 
> match ip address prefix-list OSPF1-OSPF65000
> 
> set metric 50
> 
>  
> 
> ip prefix-list GLOBAL-VrfPGW-PRIMARY seq 10 permit 172.24.0.0/16
> 
> ip prefix-list OSPF1-OSPF65000 seq 5 permit 172.24.0.0/16
> 
>  
> 
> So in first ospf process we see route 172.24.0.0 which was redistributed
> from static. 
> 
> sho ip ospf 1 database
> 
>                 Type-5 AS External Link States
> 
>  
> 
> Link ID         ADV Router      Age         Seq#       Checksum Tag
> 
> 172.24.0.0      172.24.203.241  215         0x800001CF 0x00BBF5 0
> 
> 172.24.17.224   172.24.203.243  1966        0x80000711 0x00D08C 0
> 
> 172.24.200.2    172.24.200.206  1608        0x800023BD 0x004193 0
> 
> 172.24.200.24   172.24.200.204  1256        0x80007E94 0x00860F 0
> 
> 172.24.200.24   172.24.200.205  1418        0x80007E97 0x007A17 0
> 
> 172.24.201.32   172.24.203.243  1966        0x80000F27 0x002423 0
> 
> 172.24.202.48   172.24.203.241  970         0x80000003 0x004DC5 0
> 
> 172.24.202.64   172.24.203.241  970         0x80000003 0x00AC56 0
> 
> 172.24.203.129  172.24.203.241  970         0x80000003 0x003F7A 0
> 
>  
> 
> In second ospf process we don't see route to 172.24.0.0. 
> 
> sho ip ospf 65000 database
> 
> Link ID         ADV Router      Age         Seq#       Checksum Tag
> 
> 172.24.17.0     172.24.203.22   53          0x80000002 0x00CC57 0
> 
> 172.24.17.32    172.24.203.22   53          0x80000002 0x008B78 0
> 
> 172.24.17.64    172.24.203.22   53          0x80000002 0x00AA29 0
> 
> 172.24.17.80    172.24.203.22   53          0x80000002 0x000AB9 0
> 
> 172.24.17.96    172.24.203.22   53          0x80000002 0x00B1F5 0
> 
> 172.24.17.100   172.24.203.22   53          0x80000002 0x00891A 0
> 
> 172.24.17.104   172.24.203.22   53          0x80000002 0x00495A 0
> 
> 172.24.17.128   172.24.203.22   53          0x80000002 0x00C7DB 0
> 
> 172.24.17.160   172.24.203.22   53          0x80000002 0x0086FC 0
> 
> 172.24.17.192   172.24.203.22   53          0x80000002 0x00A5AD 0
> 
>  
> 
> Have any ideas? 
> 
> B.R.
> 
> Murat Kaipov
> 
>  
> 
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-- 
  ++ytti