Avoid EBGP Best Path Transitions - Implementation Report

1. Summary

This document provides an implementation report for "Avoid BGP Best
Path Transitions from One External to Another" [1]. Each response is
listed. The editor makes no claim as to the accuracy of the
information provided.

The following organizations reported having implementations of the
draft: Cisco Systems, and Redback Networks.


2. Implementation Forms


2.1. Cisco Systems

Person filling out this form:

Kawika Chetron (kawika@cisco.com)

Implementation (Software Version):

IOS-XR 3.3

Does the implementation include all parts of the specification?

We implement the first and second paragraphs of section 3.

We have support for parallel peering sessions between the same
two peers, and as such, paragraph 3 is not applicable to our
implementation.

Are there parts of the specification that are unclear for
implementation?

No.

List other implementations that have been tested for
interoperability.

Certainly, IOS-XR has been tested extensively with IOS. I do not
know if this particular behavior has been covered in testing with
any other OS.



2.2. Redback Networks


Person filling out this form:

Albert Tian (tian@redback.com)


Implementation (Software Version):

SEOS 4.0.3

Does the implementation include all parts of the specification?

Yes.

Are there parts of the specification that are unclear for
implementation?

No.

List other implementations that have been tested for
interoperability.

Cisco.



3. Acknowledgments

The editor would like to thank Kawika Chetron and Albert Tian for
submitting the implementation forms.


4. References

[1] E. Chen, and S. Sangli, "Avoid BGP Best Path Transitions from One
External to Another", draft-ietf-idr-avoid-transition-04.txt,
December 2005.


5. Author Information

Enke Chen
Cisco Systems, Inc.
170 W. Tasman Dr.
San Jose, CA 95134

Email: enkechen@cisco.com