From: Nigel Taylor (nigel_taylor@hotmail.com)
Date: Mon Oct 14 2002 - 12:45:55 GMT-3
Mark,
By your statement I'm not sure of the question you're asking. A
couple of questions..
1. What is a NSSA?
2. What requirements would a NSSA area fulfill?
3. What type of LSAs are allowed into a NSSA area?
The redistribution of the NSSA area's route specific information into the
backbone should be quite obvious, however the answer to let's say the
"mutual redistribution"
of this scanerio resides in the questions I asked above.
HTH
Nigel
----- Original Message -----
From: "Mark" <ms6275@yahoo.de>
To: <ccielab@groupstudy.com>
Sent: Monday, October 14, 2002 6:10 AM
Subject: NSSA redisting issue
> Shouldn't OSPF automatically redist automatically between NSSA area and
area
> 0 ? The last line of the output below is not what I'd expect.
>
> -----------------------------------------------------------
>
> I do not receive mails sent to GroupStudy. By all means post your
responses
> to the Group but CC me in as well or I will not see your reply.
> http://web.onetel.net.uk/~6foot6/general.html
>
> -----------------------------------------------------------
>
>
> router ospf 1
> router-id 109.1.15.1
> log-adjacency-changes
> area 2 virtual-link 109.1.15.4
> area 3 authentication message-digest
> area 3 nssa default-information-originate metric 200 metric-type 1
> no-summary
>
>
> R1#o
> Routing Process "ospf 1" with ID 109.1.15.1
> Supports only single TOS(TOS0) routes
> Supports opaque LSA
> It is an area border and autonomous system boundary router
> Redistributing External Routes from,
> SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
> Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs
> Number of external LSA 17. Checksum Sum 0x903C7
> Number of opaque AS LSA 0. Checksum Sum 0x0
> Number of DCbitless external and opaque AS LSA 0
> Number of DoNotAge external and opaque AS LSA 0
> Number of areas in this router is 3. 2 normal 0 stub 1 nssa
> External flood list length 0
> Area BACKBONE(0)
> Number of interfaces in this area is 1
> Area has no authentication
> SPF algorithm executed 16 times
> Area ranges are
> Number of LSA 25. Checksum Sum 0xACC42
> Number of opaque link LSA 0. Checksum Sum 0x0
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 16
> Flood list length 0
> Area 2
> Number of interfaces in this area is 1
> Area has no authentication
> SPF algorithm executed 16 times
> Area ranges are
> Number of LSA 36. Checksum Sum 0x111483
> Number of opaque link LSA 0. Checksum Sum 0x0
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 0
> Flood list length 0
> Area 3
> Number of interfaces in this area is 2
> It is a NSSA area
> Perform type-7/type-5 LSA translation
> generates NSSA default route with cost 1
> Area has message digest authentication
> SPF algorithm executed 22 times
> Area ranges are
> Number of LSA 20. Checksum Sum 0xCBC47
> Number of opaque link LSA 0. Checksum Sum 0x0
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 0
> Flood list length 0
> R1#sh ip ospf data database-summary
>
> OSPF Router with ID (109.1.15.1) (Process ID 1)
>
> Area 0 database summary
> LSA Type Count Delete Maxage
> Router 3 0 0
> Network 1 0 0
> Summary Net 10 0 0
> Summary ASBR 3 0 0
> Type-7 Ext 0 0 0
> Opaque Link 0 0 0
> Opaque Area 0 0 0
> Subtotal 17 0 0
>
> Area 2 database summary
> LSA Type Count Delete Maxage
> Router 2 0 0
> Network 0 0 0
> Summary Net 18 0 0
> Summary ASBR 4 0 0
> Type-7 Ext 0 0 0
> Opaque Link 0 0 0
> Opaque Area 0 0 0
> Subtotal 24 0 0
>
> Area 3 database summary
> LSA Type Count Delete Maxage
> Router 4 0 0
> Network 1 0 0
> Summary Net 1 0 0
> Summary ASBR 0 0 0
> Type-7 Ext 6 0 0
> Opaque Link 0 0 0
> Opaque Area 0 0 0
> Subtotal 12 0 0
>
> Process 1 database summary
> LSA Type Count Delete Maxage
> Router 9 0 0
> Network 2 0 0
> Summary Net 29 0 0
> Summary ASBR 7 0 0
> Type-7 Ext 6 0 0
> Opaque Link 0 0 0
> Opaque Area 0 0 0
> Type-5 Ext 11 0 1
> Opaque AS 0 0 0
> Total 64 0 1
>
>
> R1#o data nss 172.16.0.0
>
> OSPF Router with ID (109.1.15.1) (Process ID 1)
>
>
> Type-7 AS External Link States (Area 3)
>
> Routing Bit Set on this LSA
> LS age: 128
> Options: (No TOS-capability, Type 7/5 translation, DC)
> LS Type: AS External Link
> Link State ID: 172.16.0.0 (External Network Number )
> Advertising Router: 109.1.15.3
> LS Seq Number: 80000002
> Checksum: 0xBD6B
> Length: 36
> Network Mask: /24
> Metric Type: 1 (Comparable directly to link state metric)
> TOS: 0
> Metric: 3000
> Forward Address: 0.0.0.0
> External Route Tag: 0
>
> R1#o data ext 172.16.0.0
>
> OSPF Router with ID (109.1.15.1) (Process ID 1)
>
>
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This archive was generated by hypermail 2.1.4 : Tue Nov 05 2002 - 08:35:46 GMT-3