Solved

CISCO Router and Switch Loopback Address Problems

Posted on 2013-06-20
2
644 Views
Last Modified: 2013-06-23
I tried to seach the usage of Loopback address on the internet, and I noted that there are 3 main reasons for using configure Loopback address.
1. Router's management address
2. Dynamic Routing's router id
3. BGP establish TCP connection's source address

However, are there any risk is NOT configure lookback address? Or loopback address is forget to be configured.
0
Comment
Question by:mawingho
2 Comments
 
LVL 17

Accepted Solution

by:
TimotiSt earned 400 total points
ID: 39262076
There's no particular risk when not configuring them; they are just handy to have.
- management address can be any address on a router, just keep security considerations in mind (don't allow management from the internet, etc)
- router ID can be configured under the routing protocol
- eBGP usually (not always) uses the physical address, iBGP usually uses a loopback address (when assisted by an IGP, like OSPF)

If you don't run dynamic routing protocols, you can live happily without a loopback, if you run dynamic, it depends on your environment.

Tamas
0
 
LVL 7

Assisted Solution

by:avcontrol
avcontrol earned 100 total points
ID: 39266049
In general, all hardware should have 127.0.0.1 loopback..........
This way makes possible navigate through local file/directory.
Any others loopback, will serve in case of routing hardware purpose described by TimotiSt.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Cisco Supervisor upgrade to 2T 3 65
GPO - Prevent user group from saving files locally C; 8 80
Setting up a VPN 60 137
PCI compliance 16 31
Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question