Re: OSPF type 7

ignore

fyi I had the same prefix/mask being advertised from an intra-area router -
trick question

so the asbr was preferring this for installation into the ospf rib, as soon
as I shut this loopback down I see the type 5 generated and installed into
ospf rib

  Type-7 AS External Link States (Area 1)

Link ID ADV Router Age Seq# Checksum Tag
192.168.20.0 10.1.1.26 164 0x80000001 0x00B695 0

                Type-5 AS External Link States

Link ID ADV Router Age Seq# Checksum Tag
192.168.20.0 10.1.1.21 57 0x80000001 0x0069F1 0

On 11 January 2013 03:59, Tony Singh <mothafungla_at_gmail.com> wrote:

>
> Hello
>
> I might be going insane here but doesn't the ABR import type 7 and export
> type 5 LSA's
>
>
> R21#sh ip ospf
> Routing Process "ospf 1" with ID 10.1.1.21
> Start time: 00:01:15.532, Time elapsed: 02:44:16.776
> Supports only single TOS(TOS0) routes
> Supports opaque LSA
> Supports Link-local Signaling (LLS)
> Supports area transit capability
> Event-log enabled, Maximum number of events: 1000, Mode: cyclic
> * It is an area border and autonomous system boundary router*
> Redistributing External Routes from,
> static, includes subnets in redistribution
> Router is not originating router-LSAs with maximum metric
> Initial SPF schedule delay 5000 msecs
> Minimum hold time between two consecutive SPFs 10000 msecs
> Maximum wait time between two consecutive SPFs 10000 msecs
> Incremental-SPF disabled
> Minimum LSA interval 5 secs
> Minimum LSA arrival 1000 msecs
> LSA group pacing timer 240 secs
> Interface flood pacing timer 33 msecs
> Retransmission pacing timer 66 msecs
> Number of external LSA 0. Checksum Sum 0x000000
> Number of opaque AS LSA 0. Checksum Sum 0x000000
> 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 2. 1 normal 0 stub 1 nssa
> Number of areas transit capable is 0
> External flood list length 0
> IETF NSF helper support enabled
> Cisco NSF helper support enabled
> Reference bandwidth unit is 100 mbps
> Area BACKBONE(0)
> Number of interfaces in this area is 2 (1 loopback)
> Area has message digest authentication
> SPF algorithm last executed 02:43:29.372 ago
> SPF algorithm executed 5 times
> Area ranges are
> Number of LSA 14. Checksum Sum 0x07C289
> Number of opaque link LSA 0. Checksum Sum 0x000000
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 0
> Flood list length 0
> Area 1
> Number of interfaces in this area is 1
> It is a NSSA area
> * Perform type-7/type-5 LSA translation*
> Area has message digest authentication
> SPF algorithm last executed 00:28:56.984 ago
> SPF algorithm executed 10 times
> Area ranges are
> 10.1.1.26/32 Passive DoNotAdvertise
> 172.16.13.0/29 Active(64) Advertise
> Area-filter 10 in
> Number of LSA 8. Checksum Sum 0x0341D6
> Number of opaque link LSA 0. Checksum Sum 0x000000
> Number of DCbitless LSA 0
> Number of indication LSA 0
> Number of DoNotAge LSA 0
> Flood list length 0
>
>
> ok it shows type 7/5 conversion in area 1
>
>
>
> R21#show ip ospf database
>
> (output removed)
>
> Type-7 AS External Link States (Area 1)
>
> Link ID ADV Router Age Seq# Checksum Tag
> 192.168.20.0 10.1.1.26 145 0x80000001 0x00B695 0
>
>
>
> so it generates into area 0 a type 3 summary
>
>
> Summary Net Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum
> 192.168.20.0 10.1.1.21 1456 0x80000005 0x009A3E
>
>
> is it not meant to generate a type 5?
>
> im missing some fundamental here
>
>
> :/

Blogs and organic groups at http://www.ccie.net
Received on Fri Jan 11 2013 - 04:18:27 ART