From: Simon Baxter (Simon.Baxter@xxxxxxxxxxxxxx)
Date: Fri Jul 28 2000 - 02:33:44 GMT-3
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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