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| Title: | Digital Brouters Conference |
| Notice: | New common-code brouter family: RouteAbout, DECswitch 900 |
| Moderator: | MARVIN::HART LL |
|
| Created: | Mon Jul 17 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 929 |
| Total number of notes: | 3736 |
775.0. "OSPF Internal router doesn't work." by TKOVOA::NAKANO_K (Koichi Nakano/NPB/Japan) Sat Mar 01 1997 04:47
Hello,
I configure OSPF test environment and now check how OSPF works. It doesn't
work fine than I expected. Configuration is following.
|Outside AS
|10.1.1.4
+--*-----------------------------------+
|DECswitch900EE DRS2.0 |
|ASBR |
+----*-----------------------------*---+
+------+(Area 0.0.0.0)---------------+-----------+
| |10.1.7.1/24 |10.1.8.1/24|
| | | |
| |10.1.7.2/24 |10.1.8.1/24|
+------+-----------------------------+-----------+
+----*--------+ +----*--------*
|AW90EW DRS2.0| |AW90EI DRS2.0|
|ABR1 | |ABR2 |
+---*---------+ +--*----------+
+----(Area 0.0.0.1)--+ +-----(Area 0.0.0.2)-+
| |10.1.2.1/26 | | |10.1.4.1/26 |
| |(PPP) | | |(PPP) |
| |10.1.2.2/26 | | |10.1.4.2/26 |
| +---*---------+ | | +----*--------+ |
| |AW90EW DRS2.0| | | |AW90EI DRS2.0| |
| |IR1 | | | |IR2 | |
| +---*---------+ | | +----*--------+ |
| 10.1.2.65/26 | | 10.1.4.26/26 |
| 10.1.2.129/26 | | 10.1.4.129/26|
| 10.1.2.193/26 | | 10.1.4.193/26|
| (Multiaddress)| | (Multiaddress)|
+--------------------+ +--------------------+
Setting area 1 to a stub area, It works fine I expected. Area 1 Internal
router IR1 knows inter area route, intra area route and default route. IR1
does not know exterior route information.
Area 2 set to normal area, it's not a stub area, it is not work than I
expected. Area 2 internal router IR2 does not know inter area route
information and exterior route information. Only knows intra area route
information. IR2 can not communicate with other routers in outside of the
area 2 and the AS. Changing area 2 to be stub area, IR2 can know inter area
route information and default route information, and it works fine.
Following is ASBR, ABR2 and IR2 router information. Would anyone please help
me, How should I do for IR2 knowing inter area route?
Thanks in advance.
Koichi Nakano.
---ASBR information-----------------------------------
IP config>list all
Interface addresses
IP addresses for each interface:
intf 0 IP disabled on this interface
intf 1 10.1.1.4 255.255.255.0 Network broadcast, fill 1
intf 2 10.1.7.1 255.255.255.0 Network broadcast, fill 1
intf 3 10.1.8.1 255.255.255.0 Network broadcast, fill 1
intf 4 IP disabled on this interface
intf 5 IP disabled on this interface
Router-ID: 10.1.1.4
Routing
Protocols
BOOTP forwarding: disabled
Directed broadcasts: enabled
ARP Subnet routing: disabled
RFC925 routing: disabled
OSPF: enabled
Per-packet-multipath: disabled
RIP: enabled
RIP default origination: disabled
Per-interface address flags:
intf 0 IP & RIP are disabled on this interface
intf 1 10.1.1.4 Send net, subnet and default routes
intf 2 10.1.7.1 Send no routes
intf 3 10.1.8.1 Send no routes
intf 4 IP & RIP are disabled on this interface
intf 5 IP & RIP are disabled on this interface
Per-interface Triggered Rip values :
Accept RIP updates always for:
[NONE]
EGP: disabled
OSPF Config>list all
--Global configuration--
OSPF Protocol: Enabled
# AS ext. routes: 200
Estimated # routers: 50
External comparison: Type 2
AS boundary capability: Enabled
Import external routes: RIP STA DIR SUB
Orig. default route: No (0,0.0.0.0)
Default route cost: (1, Type 2)
Default forward. addr.: 0.0.0.0
Multicast forwarding: Disabled
--Area configuration--
Area ID AuType Stub? Default-cost Import-summaries?
0.0.0.0 0=None No N/A N/A
--Interface configuration--
IP address Area Cost Rtrns TrnsDly Pri Hello Dead
10.1.7.1 0.0.0.0 1 5 5 1 10 40
10.1.8.1 0.0.0.0 1 5 5 1 10 40
OSPF>d
Type Dest net Mask Cost Age Next hop(s)
Sbnt 10.0.0.0 FF000000 1 0 None
Dir* 10.1.1.0 FFFFFF00 1 0 Eth/1
SPIA 10.1.2.0 FFFFFF00 2 2 10.1.7.2
SPIA 10.1.4.0 FFFFFF00 2 2 10.1.8.2
SPF* 10.1.7.0 FFFFFF00 1 1 Eth/2
SPF* 10.1.8.0 FFFFFF00 1 1 Eth/3
RIP 16.0.0.0 FF000000 2 20 10.1.1.1
Routing table size: 768 nets (61440 bytes), 7 nets known
OSPF>i
Ifc Address Phys assoc. Area Type State #nbrs #adjs
10.1.7.1 Eth/2 0.0.0.0 Brdcst DR 1 1
10.1.8.1 Eth/3 0.0.0.0 Brdcst DR 1 1
OSPF>n
Neighbor addr Neighbor ID State LSrxl DBsum LSreq Ifc
10.1.7.2 10.1.7.2 Full 0 0 0 Eth/2
10.1.8.2 10.1.8.2 Full 0 0 0 Eth/3
---ABR2 information-----------------------------------
IP config>list all
Interface addresses
IP addresses for each interface:
intf 0 10.1.8.2 255.255.255.0 Network broadcast, fill 1
intf 1 10.1.4.1 255.255.255.192 Network broadcast, fill 1
intf 2 IP disabled on this interface
Router-ID: 10.1.8.2
Routing
Protocols
BOOTP forwarding: disabled
Directed broadcasts: enabled
ARP Subnet routing: disabled
RFC925 routing: disabled
OSPF: enabled
Per-packet-multipath: disabled
RIP: disabled
EGP: disabled
OSPF Config>list all
--Global configuration--
OSPF Protocol: Enabled
# AS ext. routes: 1000
Estimated # routers: 50
External comparison: Type 2
AS boundary capability: Disabled
Multicast forwarding: Disabled
--Area configuration--
Area ID AuType Stub? Default-cost Import-summaries?
0.0.0.0 0=None No N/A N/A
0.0.0.2 0=None No N/A N/A
--Area ranges--
Area ID Address Mask Advertise?
0.0.0.2 10.1.4.0 255.255.255.0 Yes
--Interface configuration--
IP address Area Cost Rtrns TrnsDly Pri Hello Dead
10.1.8.2 0.0.0.0 1 5 5 1 10 40
10.1.4.1 0.0.0.2 1 5 5 1 10 40
OSPF>d
Type Dest net Mask Cost Age Next hop(s)
Sbnt 10.0.0.0 FF000000 1 0 None
SPE2 10.1.1.0 FFFFFF00 1 1 10.1.8.1
SPIA 10.1.2.0 FFFFFF00 3 3 10.1.8.1
Rnge 10.1.4.0 FFFFFF00 1 0 None
Dir* 10.1.4.0 FFFFFFC0 1 0 PPP/0
SPF 10.1.4.1 FFFFFFFF 2 2 PPP/0
SPF 10.1.4.2 FFFFFFFF 1 1 10.1.4.2
SPF 10.1.4.64 FFFFFFC0 2 2 10.1.4.2
SPF 10.1.4.128 FFFFFFC0 2 2 10.1.4.2
SPF 10.1.4.192 FFFFFFC0 2 2 10.1.4.2
SPF 10.1.7.0 FFFFFF00 2 2 10.1.8.1
SPF* 10.1.8.0 FFFFFF00 1 1 Eth/0
SPE2 16.0.0.0 FF000000 2 1 10.1.8.1
Routing table size: 768 nets (61440 bytes), 13 nets known
OSPF>i
Ifc Address Phys assoc. Area Type State #nbrs #adjs
10.1.8.2 Eth/0 0.0.0.0 Brdcst Backup 1 1
10.1.4.1 PPP/0 0.0.0.2 P-P P-P 1 1
OSPF>n
Neighbor addr Neighbor ID State LSrxl DBsum LSreq Ifc
10.1.8.1 10.1.1.4 Full 0 0 0 Eth/0
10.1.4.2 10.1.4.2 Full 0 0 0 PPP/0
---IR2 information------------------------------------
IP config>list all
Interface addresses
IP addresses for each interface:
intf 0 10.1.4.65 255.255.255.192 Network broadcast, fill 1
10.1.4.129 255.255.255.192 Network broadcast, fill 1
10.1.4.193 255.255.255.192 Network broadcast, fill 1
intf 1 10.1.4.2 255.255.255.192 Network broadcast, fill 1
intf 2 IP disabled on this interface
Router-ID: 10.1.4.2
Routing
Protocols
BOOTP forwarding: disabled
Directed broadcasts: enabled
ARP Subnet routing: disabled
RFC925 routing: disabled
OSPF: enabled
Per-packet-multipath: disabled
RIP: disabled
EGP: disabled
OSPF Config>list all
--Global configuration--
OSPF Protocol: Enabled
# AS ext. routes: 1000
Estimated # routers: 50
External comparison: Type 2
AS boundary capability: Disabled
Multicast forwarding: Disabled
--Area configuration--
Area ID AuType Stub? Default-cost Import-summaries?
0.0.0.2 0=None No N/A N/A
--Interface configuration--
IP address Area Cost Rtrns TrnsDly Pri Hello Dead
10.1.4.65 0.0.0.2 1 5 5 1 10 40
10.1.4.129 0.0.0.2 1 5 5 1 10 40
10.1.4.193 0.0.0.2 1 5 5 1 10 40
10.1.4.2 0.0.0.2 1 5 5 1 10 40
OSPF>d
Type Dest net Mask Cost Age Next hop(s)
Sbnt 10.0.0.0 FF000000 1 0 None
Dir* 10.1.4.0 FFFFFFC0 1 0 PPP/0
SPF 10.1.4.1 FFFFFFFF 1 1 10.1.4.1
SPF 10.1.4.2 FFFFFFFF 2 2 PPP/0
SPF* 10.1.4.64 FFFFFFC0 1 1 Eth/0
SPF* 10.1.4.128 FFFFFFC0 1 1 Eth/0
SPF* 10.1.4.192 FFFFFFC0 1 1 Eth/0
Routing table size: 768 nets (61440 bytes), 7 nets known
OSPF>i
Ifc Address Phys assoc. Area Type State #nbrs #adjs
10.1.4.65 Eth/0 0.0.0.2 Brdcst DR 0 0
10.1.4.129 Eth/0 0.0.0.2 Brdcst DR 0 0
10.1.4.193 Eth/0 0.0.0.2 Brdcst DR 0 0
10.1.4.2 PPP/0 0.0.0.2 P-P P-P 1 1
OSPF>n
Neighbor addr Neighbor ID State LSrxl DBsum LSreq Ifc
10.1.4.1 10.1.8.2 Full 0 0 0 PPP/0
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 775.1 | | MARVIN::HART | Tony Hart, InterNetworking Prod. Eng. Group | Mon Mar 03 1997 06:39 | 14 |
| I tried your configuration in the simulator and it works as expected, i.e. the
IR2 router has all the SPIA routes and the SPE2 route.
Could you post the output from the following commands on IR2
OSPF>ROUTERS
OSPF>DATA 0.0.0.2
OSPF>AS-EXTERNAL
this should show whether IR2 has all the LSAs it should have.
thanks,
Tony
|
| 775.2 | | TKOVOA::NAKANO_K | Koichi Nakano/NPB/Japan | Mon Mar 03 1997 06:47 | 33 |
| Thank you for your replay.
>Could you post the output from the following commands on IR2
> OSPF>ROUTERS
> OSPF>DATA 0.0.0.2
> OSPF>AS-EXTERNAL
--- IR2 info -----------
+pro ospf
Open SPF-Based Routing Protocol console
OSPF>router
DType RType Destination Area Cost Next hop(s)
BR SPF 10.1.8.2 0.0.0.2 1 10.1.4.1
OSPF>data 0.0.0.2
Type LS destination LS originator Seqno Age Xsum
1 10.1.4.2 10.1.4.2 0x8000000B 395 0xAB2
1 10.1.8.2 10.1.8.2 0x8000000A 401 0x32AA
# advertisements: 2
Checksum total: 0x3D5C
OSPF>as
Type LS destination LS originator Seqno Age Xsum
5 10.1.1.0 10.1.1.4 0x8000000C 1200 0xBBEE
5 16.0.0.0 10.1.1.4 0x8000000C 1200 0x8E17
# advertisements: 2
Checksum total: 0x14A05
OSPF>
|
| 775.3 | | TKOVOA::NAKANO_K | Koichi Nakano/NPB/Japan | Mon Mar 03 1997 10:05 | 46 |
| And this is ABR2 data.
OSPF>route
DType RType Destination Area Cost Next hop(s)
ASBR SPF 10.1.1.4 0.0.0.0 1 10.1.8.1
BR SPF 10.1.7.2 0.0.0.0 2 10.1.8.1
OSPF>as
Type LS destination LS originator Seqno Age Xsum
5 10.1.1.0 10.1.1.4 0x80000013 1207 0xADF5
5 16.0.0.0 10.1.1.4 0x80000013 1207 0x801E
# advertisements: 2
Checksum total: 0x12E13
OSPF>area
Area ID Authentication #ifcs #nets #rtrs #brdrs
0.0.0.0 None 1 2 3 2
0.0.0.2 None 1 0 2 1
OSPF>data 0.0.0.0
Type LS destination LS originator Seqno Age Xsum
1 10.1.1.4 10.1.1.4 0x8000001E 1212 0xD7DB
1 10.1.7.2 10.1.7.2 0x8000001D 1219 0x9C49
1 10.1.8.2 10.1.8.2 0x8000001A 1209 0xA63E
2 10.1.7.2 10.1.7.2 0x8000000F 1219 0x37C8
2 10.1.8.2 10.1.8.2 0x80000016 1209 0x20D5
3 10.1.2.0 10.1.7.2 0x80000011 729 0x111A
3 10.1.4.0 10.1.8.2 0x8000000F 1646 0xF732
# advertisements: 7
Checksum total: 0x37B4B
OSPF>data 0.0.0.2
Type LS destination LS originator Seqno Age Xsum
1 10.1.4.2 10.1.4.2 0x80000011 1650 0xFDB8
1 10.1.8.2 10.1.8.2 0x80000010 1645 0x26B0
# advertisements: 2
Checksum total: 0x12468
OSPF>
|
| 775.4 | Configurator related bug... | MARVIN::HART | Tony Hart, InterNetworking Prod. Eng. Group | Mon Mar 03 1997 12:40 | 40 |
| Thanks for the information. IR2 does not have the Summary LSAs (either network
or ASBR) hence the reason why there are no inter-area routes. It does have the
external LSA, however it won't add this route to the forwarding table because
it doesn't have a route to the ASBR (inter-area route again).
BUG:
I think this is caused by the way the Configurator writes the OSPF-AREA SRAM
record in that it always sets the dont-import-summary-lsa field to TRUE. When
the record is written from the CLI the field is always set to FALSE even when
the area is not a Stub.
The router initializatiob code relies on this field being set correctly
regardless of whether the area is a stub, i.e. if its a non-stub area then the
initialization code requires that this field is FALSE in order to ensure that
summary-LSA's are imported into the area. Unfortunately this isn't the case if
the Configurator writes the record.
Note that the "OSPF Config>LIST ALL" does not display the value in the
dont-import-summary-LSAs field if this is a non-stub area.
WORKAROUND:
You should be able to work-around this by seting the area in the Configurator
Extra script or directly from the CLI (the extra script is a better way). So
on ABR2 add the following lines to the extra script (note that you have to
delete the area and re-create it in order to change it)...
! Workaround bug in OSPF Area setup
PROTOCOL OSPF
DELETE AREA 0.0.0.2
SET AREA 0.0.0.2 0
no
!
Please submit an IPMT case for this so that it will get fixed promptly.
Thanks for providing such detailed information it makes diagnosing these
problems much quicker.
Tony
|