Routing
Routing

Removing the class E prefix on Martian addresses

a month ago

Hi Enthusiasts,

 

I have a query around allowing class E on Juniper devices and read this document to configure the device to allow IPv4 Class E prefixes:

https://www.juniper.net/documentation/en_US/junos/topics/example/routing-martian-routes.html

 

Here is the config snippet:

set routing-options rib inet.1 martians 240.0.0.0/4 orlonger allow
set routing-options rib inet6.0 martians fd00::/8 orlonger         <<<
set routing-options rib inet.3 martians 240.0.0.0/4 orlonger allow
set routing-options rib inet.2 martians 240.0.0.0/4 orlonger allow
set routing-options martians 240.0.0.0/4 orlonger allow

 

One of the statements is to disallow fd00::/8 orlonger unto IPv6 unicast routing tale i.e., inet6.0; can anyone explain why this is disallowed while we configure to allow IPv4 Class E prefixes?

 

I appreciate your time!

 

//Nex

4 REPLIES 4
Routing

Re: Removing the class E prefix on Martian addresses

a month ago

Hi Nexon,

 

There's no correlation between the IPv4 Class E and the fd00::/8 that we could decipher as such.  We're talking about allowing Class E for IPv4 and the allowed prefix is a special unique-local address for IPv6.  This should be a cosmetic issue with documentation that should be fixed.  Please do update if you find anything different or close it here.

 

Hope this helps.

 

Regards,
-r.

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Routing

Re: Removing the class E prefix on Martian addresses

a month ago

Hi mriyaz,

 

Thank you for the reply, I am of the same opinion.

I have sent feedback on the technical article, that should definitely be a cosmetic issue.

Anyways, I shall keep this thread updated on what I hear from the Juniper publication team.

 

//Nex

Routing

Re: Removing the class E prefix on Martian addresses

3 weeks ago

Acknowledged and welcome Nexon.  Thank you for the kudos.  Based on what you find, please mark my reply as a solution or another reply if you find it more suitable.  That will help make the post helpful for anyone else reading through.

 

Thank you.

 

Hope this helps.

Regards,
-r.

--------------------------------------------------

If this solves your problem, please mark this post as "Accepted Solution."
Kudos are always appreciated Smiley Happy.

Routing

Re: Removing the class E prefix on Martian addresses

a week ago

Hello Nexon, did you resolve your query, what's the  solution? 

 

Hope this helps.

 

Regards,
-r.

--------------------------------------------------

If this solves your problem, please mark this post as "Accepted Solution."
Kudos are always appreciated Smiley Happy.