[c-nsp] IOS XR 4.3.4 arp inner-cos / arp outer-cos

[Adam Vitkovsky]

Hi Matt,

I reckon it would be best if you open up a case with Cisco -in the case type select answer my question.
XR folks are the best that Cisco has so I'm sure they will dig up some relevant answers for you.

adam
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> Matt Carter
> Sent: 25 June 2015 05:45
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] IOS XR 4.3.4 arp inner-cos / arp outer-cos
> 
> Hi all,
> 
> I recently stumbled upon and had to set the following commands in order to
> send ARP traffic on a double tagged service to the far end with the expected
> CoS value of 0.
> 
> !
> arp inner-cos 0
> arp outer-cos 0
> !
> 
> Those commands do not appear to be documented in the  IOS XR command
> reference anywhere and ominously googling "arp inner-cos" or "arp outer-
> cos" returns no results so I'm a bit dubious about relying on these
> undocumented commands to resolve my issue when there the googles can't
> find any examples or discussion surrounding it's use.
> 
> The obvious question that comes to mind is
> 
> 1)      will these commands stay valid in 5.x or am I creating a rod for my own
> back ?
> and
> 
> 2)      Is this the proper way to ensure ARP on a Layer3 double-tagged subint
> will be originated/replied to with CoS 0 for the inner and outer vlans under
> XR ?
> 
> Your feedback most appreciated.
> 
> Kind regards,
> 
> Matt
> 
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