Re: Reg : IOS to JUNOS conversion

Hi,

Had few observations with regards to the output:

1.  I believe the announcement is for IP Transit and can see some prefixes with longer than /24. As a best practice, it is recommended not to announce longer than /24 prefixes

http://archive.apnic.net/meetings/22/docs/tut-routing-pres-bgp-bcp.pdf

2.  From the cisco config, I gathered prefixes in AES-ip & TCL-ip were being set local-preference of 500 towards AS9498 and AS4755 respectively. However, since this is eBGP, the local-preference attribute is only local within an AS and does not get announced with the set local-preference to eBGP peers.

To influence inbound routing for specific prefixes, AS-PATH preprend would be more appropriate.

3.  The order of the export policies is also import in the configuration. For example:

set protocols bgp group group-1 neighbor 14.142.79.177 export bgp-redistributes
set protocols bgp group group-1 neighbor 14.142.79.177 export bgp-policies-group-1-1-export

Policy "bgp-redistributes" already contains accept actions, hence the same prefix does not get evaluated in the next policy. Re-ordering the policy can be beneficial.

There are different ways to configure the policy for AS-PATH preprend. An example could be as below:

It's important that the order of the export policies is in the correct order. Example:

export [ TCL-AS-PREPEND EXPORT-BGP ];

 As mentioned before, there could be other ways of writing export policies to achieve the same objective.

Hope this helps.

Cheers,

Ashvin