Re: OSPF with unnumbered : duplicate router-id

From: Rick Mur (rick@rickmur.com)
Date: Thu Dec 11 2008 - 10:59:22 ARST


Strange behaviour, it should work based on my test topology.
Could you add the specific IEWB lab and task number with it?

Because the topology lacks a little now because we can't see what devices
are behind it and how they are connected and routed.

(btw. I always want to say 'dude' after I see FLOOD_WAR!! ;-)

Rick Mur
CCIE #21946 (R&S)
CCNP, CCIP, JNCIA-ER, MCSE
rick@rickmur.com

On Thu, 11 Dec 2008 17:39:58 +0530
  "GAURAV MADAN" <gauravmadan1177@gmail.com> wrote:
  HI frnds
  
  I am not at all able to point out whats happening wrong . Dont want
to
  unconfigure and configure again untill I dig whats happening : PLzz
help em
  in this
  
  ======s0/0/0=R4
                         | s0/0/1
                         |
                         |
                         | s0/0/1
  ======s0/0/0=R5
  
  R4 and R5 are on PPP link but I had unsed IP unnumbered .
  R4 getting IP from s0/0/0 ; R5 getting from virtual-template
  R4 s0/0/0 is PPPoFR ..... R5 s0/0/0 is normal FR
  
  **************************** R4 Configs *********************
  
  Rack1R4(config-if)#do sh run int s0/0/1
  Building configuration...
  Current configuration : 100 bytes
  !
  interface Serial0/0/1
  ip unnumbered Virtual-Template1
  encapsulation ppp
  clock rate 125000
  end
  Rack1R4(config-if)#do sh run int s0/0/0
  Building configuration...
  Current configuration : 125 bytes
  !
  interface Serial0/0/0
  no ip address
  encapsulation frame-relay
  frame-relay interface-dlci 402 ppp Virtual-Template1
  end
  Rack1R4(config-if)#do sh run int virtual-temp 1
  Building configuration...
  Current configuration : 124 bytes
  !
  interface Virtual-Template1
  ip address 144.1.24.4 255.255.255.0
  ppp authentication chap
  ppp chap hostname Rack1R4
  end
  *************************** R5's configs
******************************
  Rack1R5(config-if)#do sh run int s0/0/0
  Building configuration...
  Current configuration : 71 bytes
  !
  interface Serial0/0/0
  no ip address
  encapsulation frame-relay
  end
  Rack1R5(config-if)#do sh run int s0/0/0.1
  Building configuration...
  Current configuration : 151 bytes
  !
  interface Serial0/0/0.1 multipoint
  ip address 144.1.15.5 255.255.255.0
  ip ospf network broadcast
  frame-relay map ip 144.1.15.1 501 broadcast
  end
  Rack1R5(config-if)#do sh run int s0/0/1
  Building configuration...
  Current configuration : 77 bytes
  !
  interface Serial0/0/1
  ip unnumbered Serial0/0/0.1
  encapsulation ppp
  end
  *************************** OSPF Configs ***********************
  R5
  !
  router ospf 10
  router-id 150.1.5.5
  log-adjacency-changes
  network 144.1.5.5 0.0.0.0 area 0
  network 144.1.15.5 0.0.0.0 area 0
  !
  Rack1R4(config-if)#do sh run | sec ospf
  router ospf 10
  log-adjacency-changes
  area 4 range 150.1.4.0 255.255.255.0
  network 144.1.24.4 0.0.0.0 area 0
  network 150.1.4.4 0.0.0.0 area 4
  ********************************************** ERROR
********************
  
  Rack1R4(config-if)#
  *Dec 11 12:01:27.866: %OSPF-4-DUP_RTRID_AREA: Detected router with
duplicate
  router ID 150.1.4.4 in area 0
  Rack1R4(config-if)#
  *Dec 11 12:01:45.090: %OSPF-4-FLOOD_WAR: Process 10 re-originates LSA
ID
  144.1.5.10 type-2 adv-rtr 150.1.4.4 in area 0
  Where am i missing . Can someone please guide
  
  Gaurav Madan.
  
  
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