From: Michael Snyder (msnyder@revolutioncomputer.com)
Date: Sun Feb 22 2004 - 00:17:18 GMT-3
I always do frame-relay non-broadcast multi-point interfaces when given
a choice. I'm behind the curve with this stuff.
Ok, new update. My asbr router's have the /27 routes and don't have the
/32, but my plain abr router's have the /32 and not the /27. It's
136.10.100.0 I'm trying to figure out.
I don't get it. Can someone point me to a url? Why would my asbr
behave in a manner that I would prefer, and my abr only shows the host
routes.
I'm very perplexed.
---------------------------
Here's a plain abr with area 2,3 and 0.
O E1 136.10.78.0/25 [110/1001] via 136.10.56.7, 00:30:08, Vlan904
O 136.10.100.6/32 [110/121] via 136.10.56.5, 00:30:08, Vlan904
O 136.10.100.5/32 [110/1] via 136.10.56.5, 00:30:08, Vlan904
O 136.10.100.2/32 [110/65] via 136.10.56.5, 00:30:08, Vlan904
205.1.1.0/27 is subnetted, 3 subnets
3550#show ip ospf data router
OSPF Router with ID (136.10.10.10) (Process ID 36)
Router Link States (Area 0)
Routing Bit Set on this LSA
LS age: 21 (DoNotAge)
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.2.2
Advertising Router: 136.10.2.2
LS Seq Number: 80000011
Checksum: 0x4E74
Length: 84
AS Boundary Router
Number of Links: 5
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 136.10.6.6
(Link Data) Router Interface address: 136.10.100.2
Number of TOS metrics: 0
TOS 0 Metrics: 56
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 136.10.5.5
(Link Data) Router Interface address: 136.10.100.2
Number of TOS metrics: 0
TOS 0 Metrics: 56
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.100.2
(Link Data) Network Mask: 255.255.255.255
Number of TOS metrics: 0
TOS 0 Metrics: 0
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.25.0
(Link Data) Network Mask: 255.255.255.252
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.2.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 1
Routing Bit Set on this LSA
LS age: 5 (DoNotAge)
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.5.5
Advertising Router: 136.10.5.5
LS Seq Number: 80000070
Checksum: 0xA9EF
Length: 84
Area Border Router
Number of Links: 5
Link connected to: a Virtual Link
(Link ID) Neighboring Router ID: 136.10.10.10
(Link Data) Router Interface address: 136.10.56.5
Number of TOS metrics: 0
TOS 0 Metrics: 10
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.5.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 136.10.2.2
(Link Data) Router Interface address: 136.10.100.5
Number of TOS metrics: 0
TOS 0 Metrics: 64
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.100.5
(Link Data) Network Mask: 255.255.255.255
Number of TOS metrics: 0
TOS 0 Metrics: 0
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.25.0
(Link Data) Network Mask: 255.255.255.252
Number of TOS metrics: 0
TOS 0 Metrics: 1562
Routing Bit Set on this LSA
LS age: 23 (DoNotAge)
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.6.6
Advertising Router: 136.10.6.6
LS Seq Number: 80000065
Checksum: 0xE81D
Length: 60
Area Border Router
AS Boundary Router
Number of Links: 3
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.6.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: another Router (point-to-point)
(Link ID) Neighboring Router ID: 136.10.2.2
(Link Data) Router Interface address: 136.10.100.6
Number of TOS metrics: 0
TOS 0 Metrics: 64
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.100.6
(Link Data) Network Mask: 255.255.255.255
Number of TOS metrics: 0
TOS 0 Metrics: 0
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.10.10
Advertising Router: 136.10.10.10
LS Seq Number: 80000008
Checksum: 0x9923
Length: 48
Area Border Router
Number of Links: 2
Link connected to: a Virtual Link
(Link ID) Neighboring Router ID: 136.10.5.5
(Link Data) Router Interface address: 136.10.56.10
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.10.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 1
Router Link States (Area 2)
LS age: 1083
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.10.10
Advertising Router: 136.10.10.10
LS Seq Number: 80000005
Checksum: 0x7FCB
Length: 60
Area Border Router
Number of Links: 3
Link connected to: a Stub Network
(Link ID) Network/subnet number: 205.1.1.64
(Link Data) Network Mask: 255.255.255.224
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: a Stub Network
(Link ID) Network/subnet number: 205.1.1.32
(Link Data) Network Mask: 255.255.255.224
Number of TOS metrics: 0
TOS 0 Metrics: 1
Link connected to: a Stub Network
(Link ID) Network/subnet number: 205.1.1.0
(Link Data) Network Mask: 255.255.255.224
Number of TOS metrics: 0
TOS 0 Metrics: 1
Router Link States (Area 3)
Routing Bit Set on this LSA
LS age: 1993
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.5.5
Advertising Router: 136.10.5.5
LS Seq Number: 80000002
Checksum: 0x2429
Length: 36
Area Border Router
Number of Links: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.5
Number of TOS metrics: 0
TOS 0 Metrics: 10
Routing Bit Set on this LSA
LS age: 55
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.6.6
Advertising Router: 136.10.6.6
LS Seq Number: 80000003
Checksum: 0x1431
Length: 36
Area Border Router
AS Boundary Router
Number of Links: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.6
Number of TOS metrics: 0
TOS 0 Metrics: 10
Routing Bit Set on this LSA
LS age: 1197
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.7.7
Advertising Router: 136.10.7.7
LS Seq Number: 80000015
Checksum: 0xE49F
Length: 48
AS Boundary Router
Number of Links: 2
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.7
Number of TOS metrics: 0
TOS 0 Metrics: 10
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.7.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 1
LS age: 1085
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.10.10
Advertising Router: 136.10.10.10
LS Seq Number: 80000006
Checksum: 0x1524
Length: 36
Area Border Router
Number of Links: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.10
Number of TOS metrics: 0
TOS 0 Metrics: 1
3550#
---------------------------
Here's an ASBR with just area 3
E1 136.10.69.0/28 [110/1010] via 136.10.56.6, 00:34:19, Ethernet0
C 136.10.78.0/25 is directly connected, Serial0
O IA 136.10.100.0/27 [110/10] via 136.10.56.5, 00:34:19, Ethernet0
[110/10] via 136.10.56.6, 00:34:19, Ethernet0
O IA 205.1.1.0 [110/11] via 136.10.56.10, 00:34:14, Ethernet0
R 208.10.89.0/24 [120/2] via 136.10.78.8, 00:00:10, Serial0
O E1 100.10.14.0 [110/1074] via 136.10.56.5, 00:34:20, Ethernet0
R7#show ip ospf data router
OSPF Router with ID (136.10.7.7) (Process ID 36)
Router Link States (Area 3)
Routing Bit Set on this LSA
LS age: 224
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.5.5
Advertising Router: 136.10.5.5
LS Seq Number: 80000003
Checksum: 0x222A
Length: 36
Area Border Router
Number of Links: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.5
Number of TOS metrics: 0
TOS 0 Metrics: 10
Routing Bit Set on this LSA
LS age: 329
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.6.6
Advertising Router: 136.10.6.6
LS Seq Number: 80000003
Checksum: 0x1431
Length: 36
Area Border Router
AS Boundary Router
Number of Links: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.6
Number of TOS metrics: 0
TOS 0 Metrics: 10
LS age: 1471
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.7.7
Advertising Router: 136.10.7.7
LS Seq Number: 80000015
Checksum: 0xE49F
Length: 48
AS Boundary Router
Number of Links: 2
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.7
Number of TOS metrics: 0
TOS 0 Metrics: 10
Link connected to: a Stub Network
(Link ID) Network/subnet number: 136.10.7.0
(Link Data) Network Mask: 255.255.255.0
Number of TOS metrics: 0
TOS 0 Metrics: 1
Routing Bit Set on this LSA
LS age: 1360
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 136.10.10.10
Advertising Router: 136.10.10.10
LS Seq Number: 80000006
Checksum: 0x1524
Length: 36
Area Border Router
Number of Links: 1
Link connected to: a Transit Network
(Link ID) Designated Router address: 136.10.56.7
(Link Data) Router Interface address: 136.10.56.10
Number of TOS metrics: 0
TOS 0 Metrics: 1
R7#
-----Original Message-----
From: Pete Yeargin (pyeargin) [mailto:pyeargin@cisco.com]
Sent: Saturday, February 21, 2004 7:38 PM
To: 'Michael Snyder'; ccielab@groupstudy.com
Cc: 'Bob Sinclair'
Subject: RE: stupid question about ip ospf network point-to-multipoint
non-broadcast
Michael,
Do you have any other IP addresses on that common subnet other
than
the three p2p interfaces? I'm not sure I see the requirement for the
full
/27 subnet to be advertised to the other neighbors as long as the /32's
are
advertised for each of the 100.0/27 routers.
Pete
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Michael Snyder
Sent: Saturday, February 21, 2004 7:26 PM
To: ccielab@groupstudy.com
Cc: 'Bob Sinclair'
Subject: RE: stupid question about ip ospf network point-to-multipoint
non-broadcast
That puts me in the weird situation of having to put an external lsa in
for
the common network of my ospf backbone. Or I could try to summarize the
/32
routes at the each distribution point.
I can make either one work, but it's really an odd thing to do.
Thanks Bob
-----Original Message-----
From: Bob Sinclair [mailto:bsin@cox.net]
Sent: Saturday, February 21, 2004 6:10 PM
To: Michael Snyder; ccielab@groupstudy.com
Subject: Re: stupid question about ip ospf network point-to-multipoint
non-broadcast
Michael,
Since the point-to-multipoint network type does not treat the
frame-relay
network as mult-access, it does not generate a network LSA for it.
Instead,
you will see the network represented in the router LSAs as a collection
of
point-to-point networks in their respective router LSAs.
Try the command:
sh ip ospf database router
and you should see this. The command:
sh ip ospf database
lists LSAs, not networks, per se.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
This archive was generated by hypermail 2.1.4 : Fri Mar 05 2004 - 07:13:54 GMT-3