WALKTHROUGH: External LSAs

So you're stuck or don't trust your work. Here is the cheat/check page. Note that this is all done from the perspective of J2300-1. Adapt to other routers as needed.

  1. How many External LSAs exist in the LSDB?
  2. admin@J2300-1> show ospf database external summary 
    Externals:
       12 Extern LSAs
    
    admin@J2300-1> 
    [edit]
    
  3. How many ASBR Summary LSAs exist in the LSDB for each area?
  4. admin@J2300-1> show ospf database asbrsummary summary 
    Area 0.0.0.0:
       20 ASBRSum LSAs
    Area 0.0.0.1:
       10 ASBRSum LSAs
    Area 30.30.30.30:
       48 ASBRSum LSAs
    Area 101.101.101.101:
       48 ASBRSum LSAs
    Area 102.102.102.102:
       42 ASBRSum LSAs
    
    admin@J2300-1> 
    
  5. Examine the LSA with the ID 101.101.101.101
  6. admin@J2300-1> show ospf database external lsa-id 101.101.101.101 detail 
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   101.101.101.101  10.10.10.10      0x8000000f  2875  0x22 0xf110  36
      mask 255.255.255.255
      Topology default (ID 0)
        Type: 1, Metric: 101, Fwd addr: 0.0.0.0, Tag: 0.0.0.0
    
    admin@J2300-1> 
    
  7. List all of the ASBR Summary LSAs for the router that is originating the External LSA in the previous step
  8. admin@J2300-1> show ospf database asbrsummary lsa-id 10.10.10.10 
    
        OSPF database, Area 0.0.0.0
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum *10.10.10.10      10.0.0.1         0x8000002d  2501  0x22 0xf519  28
    ASBRSum  10.10.10.10      10.0.0.2         0x8000002a  2503  0x22 0xf51b  28
    ASBRSum  10.10.10.10      10.0.0.3         0x80000031  2497  0x22 0xe127  28
    ASBRSum  10.10.10.10      10.0.0.4         0x80000030  2503  0x22 0xdd2b  28
    ASBRSum  10.10.10.10      10.0.0.5         0x8000002c  2540  0x22 0xdf2c  28
    ASBRSum  10.10.10.10      10.0.0.6         0x8000002c  2614  0x22 0xd931  28
    
        OSPF database, Area 0.0.0.1
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum *10.10.10.10      10.0.0.1         0x8000002e  2474  0x22 0xf31a  28
    ASBRSum  10.10.10.10      10.0.0.3         0x80000034  2475  0x22 0xdb2a  28
    
        OSPF database, Area 30.30.30.30
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum *10.10.10.10      10.0.0.1         0x8000002a  2420  0x22 0xfb16  28
    ASBRSum  10.10.10.10      10.0.0.2         0x80000027  2423  0x22 0xfb18  28
    ASBRSum  10.10.10.10      10.0.0.3         0x8000002c  2417  0x22 0xeb22  28
    ASBRSum  10.10.10.10      10.0.0.4         0x8000002a  2422  0x22 0xe925  28
    ASBRSum  10.10.10.10      10.0.0.5         0x8000002b  2460  0x22 0xe12b  28
    ASBRSum  10.10.10.10      10.0.0.6         0x80000027  2533  0x22 0xe32c  28
                                            
        OSPF database, Area 101.101.101.101
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum *10.10.10.10      10.0.0.1         0x8000002e  2447  0x22 0xf31a  28
    ASBRSum  10.10.10.10      10.0.0.2         0x8000002b  2450  0x22 0xf31c  28
    ASBRSum  10.10.10.10      10.0.0.3         0x80000033  2444  0x22 0xdd29  28
    ASBRSum  10.10.10.10      10.0.0.4         0x80000031  2449  0x22 0xdb2c  28
    ASBRSum  10.10.10.10      10.0.0.5         0x8000002e  2486  0x22 0xdb2e  28
    ASBRSum  10.10.10.10      10.0.0.6         0x8000002e  2559  0x22 0xd533  28
    
    admin@J2300-1> 
    
  9. What role in the network is the router that is originating the External LSA with the ID 101.101.101.101 serving?
  10. admin@J2300-1> show ospf database router lsa-id 10.10.10.10 detail 
    
        OSPF database, Area 101.101.101.101
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Router   10.10.10.10      10.10.10.10      0x8000003d  2411  0x22 0x5b55  36
      bits 0x3, link count 1
      id 10.101.0.1, data 10.101.0.10, Type Transit (2)
        Topology count: 0, Default metric: 10
      Topology default (ID 0)
        Type: Transit, Node ID: 10.101.0.1
          Metric: 10, Bidirectional
    
        OSPF database, Area 102.102.102.102
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Router   10.10.10.10      10.10.10.10      0x8000003c  1983  0x22 0x713e  36
      bits 0x3, link count 1
      id 10.102.0.1, data 10.102.0.10, Type Transit (2)
        Topology count: 0, Default metric: 10
      Topology default (ID 0)
        Type: Transit, Node ID: 10.102.0.1
          Metric: 10, Bidirectional
    
    admin@J2300-1> 
    

    The router properties bits are 0x3, signifying that the router is both an ABR (0x1) and an ASBR (0x2). The router thinks it's an ABR because it has links in two different areas (101.101.101.101 and 102.102.102.102).

  11. Examine the LSA with the ID 102.102.102.102
  12. admin@J2300-1> show ospf database lsa-id 102.102.102.102 detail             
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   102.102.102.102  10.10.10.10      0x80000010  1342  0x22 0x4f2c  36
      mask 255.255.255.255
      Topology default (ID 0)
        Type: 2, Metric: 102, Fwd addr: 0.0.0.0, Tag: 0.0.0.0
    
    admin@J2300-1> 
    
  13. What are the roles of the routers that are advertising the ASBR Summary LSAs ?
  14. admin@J2300-1> show ospf database router lsa-id 10.0.0.1 detail area 0 | match bits             
      bits 0x1, link count 5
    
    admin@J2300-1> show ospf database router lsa-id 10.0.0.2 detail area 0 | match bits    
      bits 0x1, link count 5
    
    admin@J2300-1> show ospf database router lsa-id 10.0.0.3 detail area 0 | match bits    
      bits 0x1, link count 7
    
    admin@J2300-1> show ospf database router lsa-id 10.0.0.4 detail area 0 | match bits    
      bits 0x1, link count 7
    
    admin@J2300-1> show ospf database router lsa-id 10.0.0.5 detail area 0 | match bits    
      bits 0x1, link count 5
    
    admin@J2300-1> show ospf database router lsa-id 10.0.0.6 detail area 0 | match bits    
      bits 0x1, link count 5
    
    admin@J2300-1> 
    

    All of the router properties bits are set to 0x1, so each router is an ABR.

  15. Examine two External LSAs that are originating from one of the 0.0.0.1, 0.0.0.2 or 0.0.0.3 areas that your router is not serving as an ABR
  16. admin@J2300-1> show ospf database external 
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   3.3.3.0          10.1.0.3         0x80000016  2783  0x22 0x940b  36
    Extern   4.4.4.0          10.1.0.4         0x80000016  2618  0x22 0x484a  36
    Extern   5.5.5.0          10.2.0.5         0x80000011  1030  0x22 0xae63  36
    Extern   7.7.7.0          10.2.0.7         0x80000010  2937  0x22 0x484   36
    Extern   10.1.0.1         10.1.0.1         0x80000020  2281  0x22 0xc1b9  36
    Extern   10.2.0.5         10.2.0.5         0x80000020  2030  0x22 0x6d04  36
    Extern   10.3.0.11        10.3.0.11        0x80000020  1422  0x22 0xf86a  36
    Extern   10.10.10.10      10.10.10.10      0x80000023  1132  0x22 0x76bf  36
    Extern   11.11.11.0       10.3.0.11        0x80000017   422  0x22 0xae2   36
    Extern   12.12.12.0       10.3.0.12        0x80000011   128  0x22 0x81eb  36
    Extern   101.101.101.101  10.10.10.10      0x80000011  2846  0x22 0xed12  36
    Extern   102.102.102.102  10.10.10.10      0x80000011  2417  0x22 0x4d2d  36
    
    admin@J2300-1> show ospf database external lsa-id 5.5.5.0 detail 
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   5.5.5.0          10.2.0.5         0x80000011  1435  0x22 0xae63  36
      mask 255.255.255.0
      Topology default (ID 0)
        Type: 1, Metric: 1000, Fwd addr: 0.0.0.0, Tag: 0.0.0.5
    
    admin@J2300-1> show ospf database external lsa-id 7.7.7.0 detail    
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   7.7.7.0          10.2.0.7         0x80000011   421  0x22 0x285   36
      mask 255.255.255.0
      Topology default (ID 0)
        Type: 2, Metric: 1000, Fwd addr: 0.0.0.0, Tag: 0.0.0.7
    
    admin@J2300-1> 
    
  17. Locate the LSA from the inspected area that is an External Type 1 route
  18. admin@J2300-1> show ospf database external lsa-id 5.5.5.0 detail                      
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   5.5.5.0          10.2.0.5         0x80000011  1627  0x22 0xae63  36
      mask 255.255.255.0
      Topology default (ID 0)
        Type: 1, Metric: 1000, Fwd addr: 0.0.0.0, Tag: 0.0.0.5
    
    admin@J2300-1> 
    
  19. What is the metric listed in the External LSA?
  20. admin@J2300-1> show ospf database external lsa-id 5.5.5.0 detail | match "Metric:"              
        Type: 1, Metric: 1000, Fwd addr: 0.0.0.0, Tag: 0.0.0.5
    
    admin@J2300-1> 
    
  21. What is the forwarding address listed in the LSA?
  22. admin@J2300-1> show ospf database external lsa-id 5.5.5.0 detail | match "Fwd addr:"              
        Type: 1, Metric: 1000, Fwd addr: 0.0.0.0, Tag: 0.0.0.5
    
    admin@J2300-1> 
    

    Forwarding address is all 0.0.0.0, so traffic destined for 3.3.3.0/24 should be sent to the ABR

  23. In your router's routing table, what is the metric associated with the route for the LSA that has been installed in the routing table?
  24. admin@J2300-1> show route 5.5.5.0/24 terse 
    
    inet.0: 47 destinations, 47 routes (47 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 5.5.5.0/24         O 150       3515            >10.0.12.2
    
    admin@J2300-1> 
    
  25. What is the metric listed in the ASBR Summary LSAs for the router that is originating the Type 1 External LSA?
  26. admin@J2300-1> show ospf database asbrsummary lsa-id 10.2.0.5 area 0 detail                     
    
        OSPF database, Area 0.0.0.0
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum  10.2.0.5         10.0.0.2         0x80000018  2658  0x22 0x7fb0  28
      mask 0.0.0.0
      Topology default (ID 0) -> Metric: 2510
    ASBRSum  10.2.0.5         10.0.0.4         0x80000019  2659  0x22 0xd54d  28
      mask 0.0.0.0
      Topology default (ID 0) -> Metric: 2520
    
    admin@J2300-1> 
    
  27. What is the metric in your routers routing table for each of the two advertising ABRs?
  28. admin@J2300-1> show route 10.0.0.2 terse 
    
    inet.0: 47 destinations, 47 routes (47 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 10.0.0.2/32        O  10          5            >10.0.12.2
    
    admin@J2300-1> show route 10.0.0.4 terse    
    
    inet.0: 47 destinations, 47 routes (47 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 10.0.0.4/32        O  10         10             10.0.12.2
                                                     >10.0.13.3
    
    admin@J2300-1> 
    
  29. Calculate the best route based on the contents of the ASBRsummary LSAs and your routes to the ABRs. Compare this to the value installed in your routing table
  30. Via ABR 10.0.0.2: 1000 (External LSA) + 2510 (ASBRsummary) + 5 (Cost to 10.0.0.2) = 3515

    Via ABR 10.0.0.4: 1000 (External LSA) + 2520 (ASBRsummary) + 10 (Cost to 10.0.0.4) = 3530

    admin@J2300-1> show route 5.5.5.0/24 terse                          
    
    inet.0: 47 destinations, 47 routes (47 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 5.5.5.0/24         O 150       3515            >10.0.12.2
    
    admin@J2300-1> 
    
  31. Locate the LSA from the inspected area that is an External Type 2 route
  32. admin@J2300-1> show ospf database external lsa-id 7.7.7.0 detail            
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   7.7.7.0          10.2.0.7         0x80000011  1170  0x22 0x285   36
      mask 255.255.255.0
      Topology default (ID 0)
        Type: 2, Metric: 1000, Fwd addr: 0.0.0.0, Tag: 0.0.0.7
    
    admin@J2300-1> 
    
  33. Compare the metric in the Type 2 LSA to the metric installed for the route in your routing table
  34. admin@J2300-1> show route 7.7.7.0/24 terse 
    
    inet.0: 47 destinations, 47 routes (47 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 7.7.7.0/24         O 150       1000             10.0.12.2
                                                     >10.0.13.3
    
    admin@J2300-1> 
    
  35. Check and see if your router is advertising any External LSAs
  36. admin@J2300-1> show ospf database router lsa-id 10.0.0.1 detail | match bits                     
      bits 0x1, link count 5
      bits 0x1, link count 1
      bits 0x1, link count 1
      bits 0x1, link count 1
      bits 0x1, link count 1
    
    admin@J2300-1> show ospf database external advertising-router 10.0.0.1         
    
    admin@J2300-1> 
    
  37. Check and see if your router is the target of any ASBR Summary LSAs
  38. admin@J2300-1> show ospf database asbrsummary lsa-id 10.0.0.1 
    
    admin@J2300-1> 
    
  39. Delete your loopback interface from the backbone area
  40. admin@J2300-1> edit 
    Entering configuration mode
    
    [edit]
    admin@J2300-1# edit protocols ospf area 0 
    
    [edit protocols ospf area 0.0.0.0]
    admin@J2300-1# delete interface lo0.0 
    
    [edit protocols ospf area 0.0.0.0]
    admin@J2300-1# commit 
    commit complete
    
    [edit protocols ospf area 0.0.0.0]
    admin@J2300-1# run show ospf route 10.0.0.1    
    Topology default Route Table:
    
    
    [edit protocols ospf area 0.0.0.0]
    admin@J2300-1# 
    
  41. Advertise your loopback interface with an export policy
  42. [edit protocols ospf area 0.0.0.0]
    admin@J2300-1# top 
    
    [edit]
    admin@J2300-1# edit policy-options policy-statement LOOPBACK 
    
    [edit policy-options policy-statement LOOPBACK]
    admin@J2300-1# set from interface lo0.0 
    
    [edit policy-options policy-statement LOOPBACK]
    admin@J2300-1# set then accept 
    
    [edit policy-options policy-statement LOOPBACK]
    admin@J2300-1# top 
    
    [edit]
    admin@J2300-1# set protocols ospf export LOOPBACK 
    
    [edit]
    admin@J2300-1# commit and-quit 
    commit complete
    Exiting configuration mode
    
    admin@J2300-1> 
    [edit]
    
  43. Check and see if your router is originating any External LSAs or is the target of any ASBR Summary LSAs
  44. admin@J2300-1> show ospf database external advertising-router 10.0.0.1 
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern  *10.0.0.1         10.0.0.1         0x80000001   147  0x22 0x1488  36
    
    admin@J2300-1> show ospf database asbrsummary lsa-id 10.0.0.1 
    
        OSPF database, Area 0.0.0.1
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum  10.0.0.1         10.0.0.3         0x80000001   168  0x22 0xb46a  28
    
        OSPF database, Area 30.30.30.30
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum  10.0.0.1         10.0.0.2         0x80000001   164  0x22 0xba65  28
    ASBRSum  10.0.0.1         10.0.0.3         0x80000001   164  0x22 0xb46a  28
    ASBRSum  10.0.0.1         10.0.0.4         0x80000001   164  0x22 0xe038  28
    ASBRSum  10.0.0.1         10.0.0.5         0x80000001   164  0x22 0xda3d  28
    ASBRSum  10.0.0.1         10.0.0.6         0x80000001   164  0x22 0x70b   28
    
        OSPF database, Area 101.101.101.101
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum  10.0.0.1         10.0.0.2         0x80000001   164  0x22 0xba65  28
    ASBRSum  10.0.0.1         10.0.0.3         0x80000001   164  0x22 0xb46a  28
    ASBRSum  10.0.0.1         10.0.0.4         0x80000001   164  0x22 0xe038  28
    ASBRSum  10.0.0.1         10.0.0.5         0x80000001   164  0x22 0xda3d  28
    ASBRSum  10.0.0.1         10.0.0.6         0x80000001   164  0x22 0x70b   28
    ASBRSum  10.0.0.1         10.10.10.10      0x80000001   164  0x22 0x26d8  28
    
        OSPF database, Area 102.102.102.102
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    ASBRSum  10.0.0.1         10.0.0.2         0x80000001   164  0x22 0xba65  28
    ASBRSum  10.0.0.1         10.0.0.3         0x80000001   164  0x22 0xb46a  28
    ASBRSum  10.0.0.1         10.0.0.4         0x80000001   164  0x22 0xe038  28
    ASBRSum  10.0.0.1         10.0.0.5         0x80000001   164  0x22 0xda3d  28
    ASBRSum  10.0.0.1         10.0.0.6         0x80000001   164  0x22 0x70b   28
    
    admin@J2300-1> 
    
  45. Create a static route with the next hop of "receive" for the prefix 5.1..0/25
  46. admin@J2300-1> edit 
    Entering configuration mode
    
    [edit]
    admin@J2300-1# edit routing-options static 
    
    [edit routing-options static]
    admin@J2300-1# set route 5.1.1.0/25 receive 
    
    [edit routing-options static]
    admin@J2300-1# commit 
    commit complete
    
    [edit routing-options static]
    admin@J2300-1# 
    [edit]
    
  47. Create a static route with the next hop of "receive" for the prefix 5.2..0/25
  48. [edit routing-options static]
    admin@J2300-1# set route 5.2.1.0/25 receive   
    
    [edit routing-options static]
    admin@J2300-1# commit 
    commit complete
    
    [edit routing-options static]
    admin@J2300-1# 
    
  49. Advertise the 5.2..0/25 prefix as a Type 2 External Route with a metric of 2 and a tag of 2
  50. [edit]
    admin@J2300-1# edit policy-options policy-statement ADVERTISE-STATIC 
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# set term 5.1.1-NET from protocol static 
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# set term 5.1.1-NET from route-filter 5.1.1.0/25 exact 
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# set term 5.1.1-NET then metric 1                               
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# set term 5.1.1-NET then external type 1 
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# set term 5.1.1-NET then tag 1              
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# set term 5.1.1-NET then accept   
    
    [edit policy-options policy-statement ADVERTISE-STATIC]
    admin@J2300-1# top 
    
    [edit]
    admin@J2300-1# set protocols ospf export ADVERTISE-STATIC 
    
    [edit]
    admin@J2300-1# commit 
    commit complete
    
    [edit]
    admin@J2300-1# run show ospf database external advertising-router 10.0.0.1                      
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern  *5.1.1.0          10.0.0.1         0x80000001    64  0x22 0xe3ba  36
    Extern  *10.0.0.1         10.0.0.1         0x80000001   512  0x22 0x1488  36
    
    [edit]
    admin@J2300-1# 
    
  51. What is the flooding scope of the three External LSAs your router is originating?
  52. External LSAs are always flooded throughout the entire OSPF domain.

  53. Is your router identifying itself in any ASBRSummary LSAs that it is originating?
  54. admin@J2300-1> show ospf database asbrsummary lsa-id 10.0.0.1 advertising-router 10.0.0.1 | count  
    Count: 0 lines
    
    admin@J2300-1> 
    
  55. Configure your router not to install any routes in the 5.1.0.0/16 and 5.2.0.0/16 range learned through External LSAs
  56. admin@J2300-1# run show route 5/8 terse 
    
    inet.0: 58 destinations, 58 routes (58 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 5.1.1.0/25         S   5                        Receive
    * 5.1.2.0/25         O 150          6            >10.0.12.2
    * 5.1.3.0/25         O 150          6            >10.0.13.3
    * 5.1.4.0/25         O 150         11             10.0.12.2
                                                     >10.0.13.3
    * 5.1.6.0/25         O 150         16            >10.0.12.2
                                                      10.0.13.3
    * 5.2.1.0/25         S   5                        Receive
    * 5.2.2.0/25         O 150          2            >10.0.12.2
    * 5.2.3.0/25         O 150          2            >10.0.13.3
    * 5.2.4.0/25         O 150          2             10.0.12.2
                                                     >10.0.13.3
    * 5.2.5.0/25         O 150          2            >10.0.13.3
    * 5.2.6.0/25         O 150          2             10.0.12.2
                                                     >10.0.13.3
    * 5.5.5.0/24         O 150       3515            >10.0.12.2
    
    [edit]
    admin@J2300-1# 
    
  57. Does your routing table have any routes to the 5.1.0.0/16 or 5.2.0.0/16 networks (aside from your own static routes)?
  58. admin@J2300-1# run show route 5/8 terse                       
    
    inet.0: 49 destinations, 49 routes (49 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
    
    A Destination        P Prf   Metric 1   Metric 2  Next hop        AS path
    * 5.1.1.0/25         S   5                        Receive
    * 5.2.1.0/25         S   5                        Receive
    * 5.5.5.0/24         O 150       3515            >10.0.12.2
    
    [edit]
    admin@J2300-1# 
    
  59. Are any LSAs in the 5.1.0.0/16 and 5.2.0.0/16 range still present in the LSDB?
  60. admin@J2300-1> show ospf database external 
        OSPF AS SCOPE link state database
     Type       ID               Adv Rtr           Seq      Age  Opt  Cksum  Len 
    Extern   3.3.3.0          10.1.0.3         0x80000018  2462  0x22 0x900d  36
    Extern   4.4.4.0          10.1.0.4         0x80000018  2297  0x22 0x444c  36
    Extern  *5.1.1.0          10.0.0.1         0x80000002   574  0x22 0xe1bb  36
    Extern   5.1.2.0          10.0.0.2         0x80000001  1459  0x22 0xd2c9  36
    Extern   5.1.3.0          10.0.0.3         0x80000002  1250  0x22 0xbfd9  36
    Extern   5.1.4.0          10.0.0.4         0x80000001  1306  0x22 0xb0e7  36
    Extern   5.1.6.0          10.0.0.6         0x80000002  1191  0x22 0x8c07  36
    Extern  *5.2.1.0          10.0.0.1         0x80000002   300  0x22 0x75a4  36
    Extern   5.2.2.0          10.0.0.2         0x80000001  1459  0x22 0x66b2  36
    Extern   5.2.3.0          10.0.0.3         0x80000002  1250  0x22 0x53c2  36
    Extern   5.2.4.0          10.0.0.4         0x80000001  1427  0x22 0x44d0  36
    Extern   5.2.5.0          10.0.0.5         0x80000001  1430  0x22 0x33df  36
    Extern   5.2.6.0          10.0.0.6         0x80000002  1191  0x22 0x20ef  36
    Extern   5.5.5.0          10.2.0.5         0x80000013   709  0x22 0xaa65  36
    Extern   7.7.7.0          10.2.0.7         0x80000012  2616  0x22 0xff86  36
    Extern  *10.0.0.1         10.0.0.1         0x80000002   963  0x22 0x1289  36
    Extern   10.1.0.1         10.1.0.1         0x80000022  1960  0x22 0xbdbb  36
    Extern   10.2.0.5         10.2.0.5         0x80000022  1710  0x22 0x6906  36
    Extern   10.3.0.11        10.3.0.11        0x80000022  1101  0x22 0xf46c  36
    Extern   10.10.10.10      10.10.10.10      0x80000025  1131  0x22 0x72c1  36
    Extern   11.11.11.0       10.3.0.11        0x80000019   101  0x22 0x6e4   36
    Extern   12.12.12.0       10.3.0.12        0x80000012  2807  0x22 0x7fec  36
    Extern   101.101.101.101  10.10.10.10      0x80000014   229  0x22 0xe715  36
    Extern   102.102.102.102  10.10.10.10      0x80000013  2255  0x22 0x492f  36
    
    admin@J2300-1>