OSPF type 7

From: Tony Singh <mothafungla_at_gmail.com>
Date: Fri, 11 Jan 2013 03:59:16 +0000

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

:/

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Received on Fri Jan 11 2013 - 03:59:16 ART

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