ICX IPv6 /127 Prefix Support?

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  • Updated 6 months ago
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  • (Edited)
Is it possible to configure an interface with a /127 prefix for a point-to-point link (ICX 7650, 08.0.70b)?

For example, let's say I want to configure a point-to-point link between two routers using the prefix 2001:DB8::/127. I seem to be unable to use the first address in the prefix.

[R1] --- [R2]


R1:
R1(config)# int ve 1 port-name Link_to_R2
R1(config-vif-1)# ipv6 address 2001:DB8::/127 Error: cannot assign prefix address! R1(config-vif-1)#

R2:
R2(config)# int ve 1 port-name Link_to_R1
R2(config-vif-1)# ipv6 address 2001:DB8::1/127
R2(config-vif-1)#
Photo of Dan Baker

Dan Baker

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Posted 6 months ago

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Photo of Michael Brado

Michael Brado, Official Rep

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Hi Dan,

 
    Tech Support checked for us and found this is not supported on ICX, and might require
a Feature Request thru your local System Engineer to file on your behalf, to our product
managers attention.  Browsing the Internet, it appears that other vendors may not support
this IPv6 prefix either.
https://www.networkworld.com/article/2223366/cisco-subnet/the-case-for--127-subnets.html

 
(Edited)
Photo of Dan Baker

Dan Baker

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Hi Michael,
Not sure about other vendors, but it is definitely supported in all of our Cisco gear. RFC 6164 (https://tools.ietf.org/html/rfc6164) makes a good case for using /127 in transit links. How can I reach the correct person to file a feature request?

Thanks,
Dan
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Michael Brado, Official Rep

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That would be your local Ruckus reseller (or SE) in your area.Our Product Managers do also follow our Forums, but may not be speaking up...  =:^)