From: Simon Baxter (Simon.Baxter@xxxxxxxxxxxxxx)
Date: Fri Jul 28 2000 - 03:18:18 GMT-3
Thanks, that makes the links add up better!!
-----Original Message-----
From: Hank Leung [mailto:hank1979@hotmail.com]
Sent: Wednesday, July 28, 1999 4:05 PM
To: Simon Baxter
Subject: Re: OSPF areas
Try show ip ospf database router
----- Original Message -----
From: Simon Baxter <Simon.Baxter@au.logical.com>
To: <ccielab@groupstudy.com>
Sent: Friday, July 28, 2000 1:33 AM
Subject: OSPF areas
> I'm getting really confused here. I'm sure this will be a very simple one
> for someone.
>
> All documentation I can find states : An area is a group of routers that
> maintain complete local link state databases, but only export summary
> advertisements to other areas. (Caslow 390)
>
> What I thought this would mean is every router in an area will have LSA
link
> entiries for every link within that area, but I'm not seeing this.
>
> Scenario : RTRa and RTRb are in area 0, connected by a point-to-point link
> and have full adjacency. RTRa has 3 loopback interfaces all running ospf.
>
> If an LSA is created and flooded for each link in an area, why can't I see
a
> link LSA entry in the 'sh ip os da'?
>
> Why is there only a single entry '10.1.4.1' with a link count of 4.
>
>
> am I thinking too hard about this?
>
>
> eg.
> RTRE# sh ip int brief
> Interface IP-Address OK? Method Status
> Protocol
> Ethernet0 10.1.1.2 YES NVRAM up up
> Loopback1 10.1.2.1 YES NVRAM up up
> Loopback2 10.1.3.1 YES NVRAM up up
> Loopback3 10.1.4.1 YES NVRAM up up
> Serial0 unassigned YES unset administratively down
down
> Serial1 unassigned YES unset administratively down
down
> Serial2 unassigned YES unset administratively down
down
> Serial3 unassigned YES unset administratively down
down
>
> RTRD#sh ip os da
> OSPF Router with ID (193.1.1.1) (Process ID 10)
>
> Router Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum Link count
> 10.1.4.1 10.1.4.1 65 0x80000002 0xD2BA 4
> 193.1.1.1 193.1.1.1 64 0x80000002 0xA6DE 1
>
> Net Link States (Area 0)
>
> Link ID ADV Router Age Seq# Checksum
> 10.1.1.1 193.1.1.1 64 0x80000001 0x3B58
>
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