From: Bob Sinclair (bsin@cox.net)
Date: Sun Feb 27 2005 - 12:45:14 GMT-3
KC,
It looks from your debug that the neighbor R1 to R2 is unstable. If you can
get that fixed, and clear your ospfv3 process on R6, it should work.
Double-check your ospfv6 neighbor types across the frame link R1-R2. Triple
check your routable and link-local frame maps on this link. Perhaps try p-m
network type. Just some thoughts.
Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net
----- Original Message -----
From: k c
To: Bob Sinclair ; ccielab@groupstudy.com
Sent: Sunday, February 27, 2005 3:08 AM
Subject: Re: IPv6 OSPF problem
Hi Bob amf Group,
1) U can find the output of sh ip ospf data external adv-router 172.16.20.5
at the end of last email. I have read ready the document before and after
reread it, I still cannot understand why?
The connection is
R6--atm(OSPFv6-area16)--R1--FR(OSPFv6-area0)--R2--RIPv6--R5. Pls note that
FEC0::BBBB:1 (FR int of R1) can be learnt from R1. FEC0::D3D3:0/120 can also
be learnt (this route is advertised by R1 via redistribute isis originated
from R3, R3 is also connected to R1 via FR).
Besides, FEC0::AAAA:0 and FEC0::DADA:0 (originated from R5 via
redistribution of RIPv6) can be found in routing table of R1, but not in R6.
How can I check whether 172.16.20.5 is reachable?
2) I found that the ospfv6 neighbour between R1 and R2 (routerid is
172.16.20.5). Does anybody know why? Thanks,
Feb 26 23:16:31.568: OSPFv3: Killing nbr 172.16.20.5 on Serial5/0 due to
excessive (25) retransmissions
Feb 26 23:16:31.568: OSPFv3: 172.16.20.5 address FE80::2222:2222 on
Serial5/0 is dead, state DOWN
Feb 26 23:16:31.568: %OSPFv3-5-ADJCHG: Process 1, Nbr 172.16.20.5 on
Serial5/0 from FULL to DOWN, Neighbor Down: Too many retransmits
Feb 26 23:16:31.568: OSPFv3: Neighbor change Event on interface Serial5/0
Feb 26 23:16:31.568: OSPFv3: DR/BDR election on Serial5/0
Feb 26 23:16:31.568: OSPFv3: Elect BDR 0.0.0.0
Feb 26 23:16:31.568: OSPFv3: Elect DR 172.16.123.1
Feb 26 23:16:31.568: DR: 172.16.123.1 (Id) BDR: none
Feb 26 23:16:31.604: OSPF: Nbr 172.16.20.5 FE80::2222:2222 Serial5/0 is
currently ignored
Feb 26 23:16:32.068: Insert LSA 1006 adv_rtr 172.16.123.1, type 0x2009 in
maxage
Feb 26 23:16:32.068: Insert LSA 6 adv_rtr 172.16.123.1, type 0x2002 in
maxage
Feb 26 23:16:37.068: Insert LSA 2 adv_rtr 172.16.123.1, type 0x2003 in
maxage
Feb 26 23:16:37.068: Insert LSA -1408232443 adv_rtr 172.16.123.1, type
0x2004 in maxage
Feb 26 23:16:37.136: Insert LSA 39 adv_rtr 172.16.106.1, type 0x2003 in
maxage
Feb 26 23:16:37.136: Insert LSA -1408232443 adv_rtr 172.16.106.1, type
0x2004 in maxage
Feb 26 23:16:42.068: OSPFv3: service_maxage: Trying to delete MAXAGE LSA
Feb 26 23:16:42.068: processing 172.16.106.1/27, type 2003
Feb 26 23:16:42.068: processing 172.16.106.1/AC101405, type 2004
Feb 26 23:16:42.792: Insert LSA -1408232443 adv_rtr 172.16.123.1, type
0x2004 in maxage
Feb 26 23:17:31.568: OSPFv3: 0.0.0.0 address FE80::2222:2222 on Serial5/0 is
dead
Feb 26 23:17:31.568: OSPFv3: 0.0.0.0 address FE80::2222:2222 on Serial5/0 is
dead, state DOWN
Feb 26 23:17:31.568: %OSPFv3-5-ADJCHG: Process 1, Nbr 0.0.0.0 on Serial5/0
from ATTEMPT to DOWN, Neighbor Down: Ignore timer expired
Feb 26 23:17:31.568: OSPFv3: Neighbor change Event on interface Serial5/0
Feb 26 23:17:31.568: OSPFv3: DR/BDR election on Serial5/0
Feb 26 23:17:31.568: OSPFv3: Elect BDR 0.0.0.0
Feb 26 23:17:31.568: OSPFv3: Elect DR 172.16.123.1
Feb 26 23:17:31.568: DR: 172.16.123.1 (Id) BDR: none
Feb 26 23:17:33.236: OSPFv3: Sending poll to 0.0.0.0 address FE80::3333:3333
on Serial5/0
Feb 26 23:17:54.240: OSPFv3: 2 Way Communication to 172.16.20.5 on
Serial5/0, state 2WAY
Feb 26 23:17:54.244: OSPFv3: Neighbor change Event on interface Serial5/0
Feb 26 23:17:54.244: OSPFv3: DR/BDR election on Serial5/0
Feb 26 23:17:54.244: OSPFv3: Elect BDR 0.0.0.0
Feb 26 23:17:54.244: OSPFv3: Elect DR 172.16.123.1
Feb 26 23:17:54.244: DR: 172.16.123.1 (Id) BDR: none
Feb 26 23:17:54.244: OSPFv3: Send DBD to 172.16.20.5 on Serial5/0 seq 0x12D6
opt 0x0013 flag 0x7 len 28
Feb 26 23:17:54.264: OSPFv3: Rcv DBD from 172.16.20.5 on Serial5/0 seq 0xF5D
opt 0x0013 flag 0x7 len 28 mtu 1500 state EXSTART
Feb 26 23:17:54.264: OSPFv3: First DBD and we are not SLAVE
Feb 26 23:17:59.244: OSPFv3: Send DBD to 172.16.20.5 on Serial5/0 seq 0x12D6
opt 0x0013 flag 0x7 len 28
Feb 26 23:17:59.244: OSPFv3: Retransmitting DBD to 172.16.20.5 on Serial5/0
[1]
Feb 26 23:17:59.264: OSPFv3: Rcv DBD from 172.16.20.5 on Serial5/0 seq 0xF5D
opt 0x0013 flag 0x7 len 28 mtu 1500 state EXSTART
Feb 26 23:17:59.264: OSPFv3: First DBD and we are not SLAVE
Feb 26 23:17:59.324: OSPFv3: Rcv DBD from 172.16.20.5 on Serial5/0 seq
0x12D6 opt 0x0013 flag 0x2 len 428 mtu 1500 state EXSTART
Feb 26 23:17:59.324: OSPFv3: NBR Negotiation Done. We are the MASTER
Feb 26 23:17:59.324: OSPFv3: Send DBD to 172.16.20.5 on Serial5/0 seq 0x12D7
opt 0x0013 flag 0x3 len 428
Feb 26 23:17:59.328: OSPFv3: Database request to 172.16.20.5
Feb 26 23:17:59.328: OSPFv3: sent LS REQ packet to FE80::2222:2222, length
24
Feb 26 23:17:59.400: OSPFv3: Rcv DBD from 172.16.20.5 on Serial5/0 seq
0x12D7 opt 0x0013 flag 0x0 len 28 mtu 1500 state EXCHANGE
Feb 26 23:17:59.400: OSPFv3: Send DBD to 172.16.20.5 on Serial5/0 seq 0x12D8
opt 0x0013 flag 0x1 len 28
Feb 26 23:17:59.440: OSPFv3: Rcv DBD from 172.16.20.5 on Serial5/0 seq
0x12D8 opt 0x0013 flag 0x0 len 28 mtu 1500 state EXCHANGE
Feb 26 23:17:59.440: OSPFv3: Exchange Done with 172.16.20.5 on Serial5/0
Feb 26 23:17:59.440: OSPFv3: Synchronized with 172.16.20.5 on Serial5/0,
state FULL
Feb 26 23:17:59.440: %OSPFv3-5-ADJCHG: Process 1, Nbr 172.16.20.5 on
Serial5/0 from LOADING to FULL, Loading Done
R6-r8bb2#sh ipv6 ospf database router adv-router 172.16.20.5
OSPFv3 Router with ID (172.16.106.1) (Process ID 1)
Router Link States (Area 0)
LSA ignored in SPF calculation
LS age: 1527 (DoNotAge)
Options: (V6-Bit E-Bit R-bit DC-Bit)
LS Type: Router Links
Link State ID: 0
Advertising Router: 172.16.20.5
LS Seq Number: 800001BE
Checksum: 0xF3EF
Length: 40
AS Boundary Router
Number of Links: 1
Link connected to: a Transit Network
Link Metric: 64
Local Interface ID: 6
Neighbor (DR) Interface ID: 6
Neighbor (DR) Router ID: 172.16.123.1
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 1527 (DNA) 0x800001BE 0 1 E
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID
172.16.20.5 8 (DNA) 0x80000001 0 0x2001 0
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 1172 0x80000130 FEC0::A5A5:0/120
172.16.20.5 1172 0x8000012B FEC0::AAAA:0/120
172.16.20.5 1513 0x80000001 FEC0::DADA:0/120
Bob Sinclair <bsin@cox.net> wrote:
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_note09186a008009481
a.
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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