From: Bob Sinclair (bsin@cox.net)
Date: Sat Feb 26 2005 - 17:08:42 GMT-3
KC,
I suspect that the router does not believe that 172.16.20.5 is reachable, in
some sense. Do you have matching network types? Do you have the required
link-local maps?
Can you send the output of sh ip ospf data external adv-router 172.16.20.5 ?
It might give a hint. The best link I know on this topic is this one:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009481a.
shtml
Which is entitled: Why Are Some OSPF Routes in the Database but Not in the
Routing Table?
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net
----- Original Message -----
From: k c
To: ccielab@groupstudy.com
Sent: Saturday, February 26, 2005 10:51 AM
Subject: IPv6 OSPF problem
Hi Group,
I wonder why the external ipv6 prefix FEC0::AAAA:0 and FEC0::A5A5:0 cannot
be inserted into routing table? Any idea? Thanks.
R6-r8bb2#sh ipv6 ospf database external
OSPFv3 Router with ID (172.16.106.1) (Process ID 1)
Type-5 AS External Link States
LS age: 1165
LS Type: AS External Link
Link State ID: 0
Advertising Router: 172.16.20.5
LS Seq Number: 80000113
Checksum: 0x155F
Length: 44
Prefix Address: FEC0::A5A5:0
Prefix Length: 120, Options: None
Metric Type: 2 (Larger than any link state path)
Metric: 40
LS age: 1165
LS Type: AS External Link
Link State ID: 1
Advertising Router: 172.16.20.5
LS Seq Number: 8000010E
Checksum: 0x88F9
Length: 44
Prefix Address: FEC0::AAAA:0
Prefix Length: 120, Options: None
Metric Type: 2 (Larger than any link state path)
Metric: 20
Routing Bit Set on this LSA
LS age: 665
LS Type: AS External Link
Link State ID: 2
Advertising Router: 172.16.123.1
LS Seq Number: 80000009
Checksum: 0x5E73
Length: 44
Prefix Address: FEC0::D3D3:0
Prefix Length: 120, Options: None
Metric Type: 2 (Larger than any link state path)
Metric: 20
R6-r8bb2#sh ipv6 route ospf
IPv6 Routing Table - 8 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
O FEC0::BBBB:1/128 [110/1]
via FE80::6666:1111, ATM2/0.2
OE2 FEC0::D3D3:0/120 [110/20]
via FE80::6666:1111, ATM2/0.2
R6-r8bb2#sh ipv6 ospf database adv-router 172.16.123.1
OSPFv3 Router with ID (172.16.106.1) (Process ID 1)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
172.16.123.1 1 (DNA) 0x800002BD 0 2 EB
Inter Area Prefix Link States (Area 0)
ADV Router Age Seq# Prefix
172.16.123.1 796 (DNA) 0x80000001 FEC0::CCCC:0/120
172.16.123.1 40 (DNA) 0x80000001 FEC0::C6C6:6/128
172.16.123.1 5 (DNA) 0x80000001 FEC0::BBBB:1/128
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
172.16.123.1 10 (DNA) 0x80000001 56 OS0
Router Link States (Area 16)
ADV Router Age Seq# Fragment ID Link count Bits
172.16.123.1 709 0x8000000C 0 1 EB
Inter Area Prefix Link States (Area 16)
ADV Router Age Seq# Prefix
172.16.123.1 713 0x8000000A FEC0::BBBB:0/120
172.16.123.1 205 0x8000000A FEC0::C6C6:0/120
Inter Area Router Link States (Area 16)
ADV Router Age Seq# Link ID Dest RtrID
172.16.123.1 238 0x80000001 2886734853 172.16.20.5
Link (Type-8) Link States (Area 16)
ADV Router Age Seq# Link ID Interface
172.16.123.1 713 0x8000000A 48 AT2/0.2
Intra Area Prefix Link States (Area 16)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID
172.16.123.1 205 0x8000000A 0 0x2001 0
Link (Type-8) Link States (Area 60)
ADV Router Age Seq# Link ID Interface
Type-5 AS External Link States
ADV Router Age Seq# Prefix
172.16.123.1 1204 0x80000009 FEC0::D3D3:0/120
R6-r8bb2#sh ipv6 ospf database adv-router 172.16.20.5
OSPFv3 Router with ID (172.16.106.1) (Process ID 1)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
172.16.20.5 1293 (DNA) 0x80000186 0 1 E
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
Link (Type-8) Link States (Area 16)
ADV Router Age Seq# Link ID Interface
Link (Type-8) Link States (Area 60)
ADV Router Age Seq# Link ID Interface
Type-5 AS External Link States
ADV Router Age Seq# Prefix
172.16.20.5 1717 0x80000113 FEC0::A5A5:0/120
172.16.20.5 1718 0x8000010E FEC0::AAAA:0/120
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