Difference between Cisco IOS and Cisco IOS XR

Changes have been made in new Cisco IOS called CISCO IOS-XR

The very basic difference between IOS and IOS XR is of kernel. In Cisco IOS kernel is monolithic and all installations have one image and the ongoing processes use one address space. In processes memory is not protected, means if any one process gets crashed, it can affect the whole box leading to a reload.

Secondly, monolithic code has a particular scheduler which watches the process initation and doesnt let any process start untill enough resources arent available. IOS XR runs all processes with separate protection between them and can restart any process without putting impact on others.

Configuration model is also different. IOS has one stage and the applied command takes into effect immediately while in IOS XR, the change in configurations stay in a separate area before we use commit command to change running config.

If there is any error, i observed following error msg:


%Failed to commit one or more configuration items

Also we can see the failed items using #show configuration failed command

Commands that are Omitted in IOS XR

1- aaa authentication
2- version
3- access-list compiled
4- enable
5- boot system
6- tag switching
7- aaa new-model
8- ip boost server
9- ip classless
10- ip finger
11- ip bgp-community new-format
12- service upgrade all
13- ip receive
14- mpls lable protocol ldp
15- service nagle
16- no service pad
17- ip subnet-zero
18- service password-encryption
19- mpls traffic-eng auto-bw
20- service tcp-keepalives-out
21- service tcp-keepalives-in
22- access-list number
23- ip sdp


FAQs


What commands do not exist in CISCO IOS XR anymore?
What are the changes in CISCO IOS XR commands?
Which CISCO IOS commands are changed?

Copyright

All the material is created by the author and the rights to share lie with the author himself. However the forum is open for discussion and the effort is to give as much knowledge to reader as possible.

Regards

Author/Trainer: mplsnetworks dot blogspot dot com

ATM over MPLS AToM

AToM is known as ATM over MPLS.

No doubt MPLS is the latest technology but still ATM is widely used in the market and there are still customers using IPBX and dedicated leased line services via ATM.

MPLS has interoperability phenomenon which helps carry ATM traffic over MPLS cloud.

AAL5 layer is used and SDV, PVC, SVC are the circuit type and protocols.

Login procedure for ATM CBX500

At the back side you can have a  view of CBX , serial port is given for local Login

Following is the cable picture:

  

Connect Db connector to ATM port and USB serial to USB connector accordingly

Open hyperterminal

Create connection

Select the Com port

Select 19200 bits per second

  

There you go.. you will be logged in

* If you dont see anything press ctrl + break

Cable Details. One End DB9 , other End is DB 25

How to Manufacture/Prepare Cable by yourself:

Following is the PIN Configuration:

Get one 9 Pin female connector

Get one 25 pin female connector 

Sold the pins as given configuration using CAT 5 or CAT 6 ethernet cable

FAQ

How to login CBX 500 ATM

How to login BSTDX 9000 ATM 

Copyright

All the material is created by the author and the rights to share lie with the author himself. However the forum is open for discussion and the effort is to give as much knowledge to reader as possible.

Regards

Author/Trainer: mplsnetworks dot blogspot dot com

What is MPLS

MPLS is the most sought after protocol in the modern networks which provides a state of the art mechanism to forward packets in any network topology. MPLS stands for Multi-Protocol Label Switching.

The basic concept is the fast data rate achievement and helping consumers shifting towards DATA networks.

Gone are the days when VOICE was considered to be the best  service and people spent alot on calls where the VOICE media was used in every field of life. Data networks have made communication so easy to manage and subscribers are using DATA networks for learning, communicating with world, marketing, selling, buying and advertising.

Facebook, Linkedin, Twitter, Google and many many more forums are considered to be the living fluid of modern age. All this is possible due to DATA NETWORKS.

Thanks to MPLS and thanks to ISP networks.

Copyright

All the material is created by the author and the rights to share lie with the author himself. However the forum is open for discussion and the effort is to give as much knowledge to reader as possible.

Regards

Author/Trainer: mplsnetworks dot blogspot dot com