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Re: [IPv6] Request for WG adoption call for draft-carpenter-6man-zone-ui

Ole Troan <otroan@employees.org> Fri, 19 April 2024 20:32 UTC

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From: Ole Troan <otroan@employees.org>
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Date: Fri, 19 Apr 2024 22:31:43 +0200
Cc: Carsten Bormann <cabo@tzi.org>, Michael Richardson <mcr+ietf@sandelman.ca>, 6man WG <ipv6@ietf.org>
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References: <58fcbf4b-66ac-4aad-a143-7a4ba0490564@gmail.com> <15902.1713483836@obiwan.sandelman.ca> <613e475a-0582-4308-8eaf-eb39536355da@gmail.com> <C14B4DE0-D033-4917-B8A6-B5A285389958@tzi.org> <7ded9a0e-b93f-4821-ac07-b3edbd064c6e@gmail.com> <99F3F3B9-E36F-4072-ADFC-6A8C692BB54D@tzi.org> <CANMZLAaNkYgKW85xwaOBFzfyj50i4kmKOmyAV7tOqd8MR4p1xA@mail.gmail.com> <7B1B24B0-D28C-4E51-8286-9B0062F0BC74@employees.org> <8f2c83ba-7c6c-46e5-a6b1-b64828094057@gmail.com> <af7374f8-14d5-4dc1-ae97-c87490cd08c6@gmail.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Subject: Re: [IPv6] Request for WG adoption call for draft-carpenter-6man-zone-ui
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>>>> As far as I know, only ASCII is deployed.
>>> 
>>> In an unusual show of Friday restraint I stopped myself from adding a “blåbærsyltetøy0/0/0” interface on my CPE.
>> I'm going to guess that the Linux implementation is just char ifname[16].
> 
> Or char ifname[IFNAMSIZ + 1], to allow for a null terminator.
> 
> In any case, we shouldn't complicate that. For example,  “blåbærsyltetøy0/0/0” would exceed 16 bytes,
> but so would “blåbærsyltetøy”.

Luckily my CPE doesn’t run Linux:

vpp# show interface
              Name               Idx    State  MTU (L3/IP4/IP6/MPLS)     Counter          Count     
blåbærsyltetøy0/0/0            1     down         9000/0/0/0
local0                            0     down          0/0/0/0       

When the linux side of a virtio interface is connected, is does indeed limit to:
blåbærsyltet?: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::fe:feff:fee4:e449  prefixlen 64  scopeid 0x20<link>
        ether 02:fe:fe:e4:e4:49  txqueuelen 1000  (Ethernet)
        RX packets 1  bytes 150 (150.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 516 (516.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


Cheers,
Ole

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