Cisco IOS Release/Train codes

Answered Question
Feb 19th, 2010

Hello,

I'm looking for the descrition of IOS Release/Train codes. I see alot of IOS releases (12.2SXE, 12.2SRE, etc.).

I know only some of them. For example: S - for Service Providers, T - Technologie train, E - Enterprise train.

But what about another: X, R, etc. ?

Can somebody help me to find a full description of ALL IOS Release/Train codes?

Thank you,

Piotr Covalciuc

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Correct Answer by Ganesh Hariharan about 6 years 11 months ago

Hello,

I'm looking for the descrition of IOS Release/Train codes. I see alot of IOS releases (12.2SXE, 12.2SRE, etc.).

I know only some of them. For example: S - for Service Providers, T - Technologie train, E - Enterprise train.

But what about another: X, R, etc. ?

Can somebody help me to find a full description of ALL IOS Release/Train codes?

Thank you,

Piotr Covalciuc

Hi Piotr Covalciuc,

IOS routers would use the 12.4M (Mainline) or 12.4T (Technology). You will find the T train to contain the newest features but it may also contain the most bugs. We often recommend Mainline over T train if you are interested on stability in your network without the need of new features.

Other tracks would be platform specific, for instance;

12.2SX = Catalyst 6500
12.2SE = Catalyst 3xxx switches
12.2SR = Cisco 7600 Routers
12.2SB = Cisco 7200 and 7300 Routers.

and check out the below link hope that help !!

http://www.cisco.com/en/US/products/sw/iosswrel/ps1818/products_tech_note09186a0080101cda.shtml

If helpful do rate the post

Ganesh.H

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Correct Answer
Ganesh Hariharan Fri, 02/19/2010 - 11:04

Hello,

I'm looking for the descrition of IOS Release/Train codes. I see alot of IOS releases (12.2SXE, 12.2SRE, etc.).

I know only some of them. For example: S - for Service Providers, T - Technologie train, E - Enterprise train.

But what about another: X, R, etc. ?

Can somebody help me to find a full description of ALL IOS Release/Train codes?

Thank you,

Piotr Covalciuc

Hi Piotr Covalciuc,

IOS routers would use the 12.4M (Mainline) or 12.4T (Technology). You will find the T train to contain the newest features but it may also contain the most bugs. We often recommend Mainline over T train if you are interested on stability in your network without the need of new features.

Other tracks would be platform specific, for instance;

12.2SX = Catalyst 6500
12.2SE = Catalyst 3xxx switches
12.2SR = Cisco 7600 Routers
12.2SB = Cisco 7200 and 7300 Routers.

and check out the below link hope that help !!

http://www.cisco.com/en/US/products/sw/iosswrel/ps1818/products_tech_note09186a0080101cda.shtml

If helpful do rate the post

Ganesh.H

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