Subject: [spring] Packet Captures?

From: Andrew Alston <[email-masked]>
Date: Fri, 6 Mar 2020 17:55:09 +0000

Hi Guys,

I just wondered, since there are people on this list who are on the deployment draft – if anyone here has some packet captures from platforms that actually use the SRH.

In an effort to truly understand the behavior of the network programming draft and be able to comment in an informed manner, I’ve been doing a whole bunch of testing.  My problem is – with the boxes (in my case Cisco XR platforms of various flavors) – I am still unable on any code version I have to make them produce anything with an SRH header on it, and do my own compatibility checks and check my own packet generation against the draft – some actual production packet headers would be really useful.  (Any information about how to steer traffic in production XR code would also be welcomed – since I can’t seem to find anything in the code that does that – but I am figuring considering the deployment draft – someone on here must have ways to do this that I am missing)

Alternatively – is there anyone here who can tell me under what circumstances XR which is what I have to work with – will actually generate an SRH and use it – so that I can use that to generate my own packets.  Right now – even when creating vpn’s and using DT4 - I am seeing nothing more than effective iP tunneling (which I presume is as per section 4.7 of the draft)

Thanks

Andrew