thanks a lot !!
What I do not fully understand from the explanation above is "set protocols ospf area 0.0.0.1 area-range 3.3.3.3/32 restrict".
1. I thought the loopback IPs are advertised via ospf for them to be reachable to each other for GRE establishment. The restrict aims to stop it advertised. I do know why.
2. I tested and did not find any difference whether I used this line or not. area-range is normally used on ABR connected to backbone area.
Original Message:
Sent: 05-08-2021 11:35
From: Unknown User
Subject: Can anyone help to understand what the following line is for ?
area-range is used for summarization and controlling routes between two areas, on ABR. please see below resources from Juniper.
(Area border routers only) For an area, summarize a range of IP addresses when sending summary link advertisements (within an area). To summarize multiple ranges, include multiple area-range
statements.
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/ref/statement/area-range-edit-protocols-ospf.html
here is an example that might help you understand:
https://www.juniper.net/documentation/en_US/junos/topics/example/ospf-route-summarization-configuring.html
Original Message:
Sent: 05-05-2021 23:32
From: Unknown User
Subject: Can anyone help to understand what the following line is for ?
I came across a sample configuration for the following topology