IPv6 point to point addressing
lincis_aus
Member Posts: 50 ■■■□□□□□□□
in CCNP
Hi guys,
All of the network configs i saw so far are using a /64 network for a point to point connection. Why is this when only 2 addresses are needed? A /127 gives you exactly 2 addresses, why doesn't anyone use this address?
All of the network configs i saw so far are using a /64 network for a point to point connection. Why is this when only 2 addresses are needed? A /127 gives you exactly 2 addresses, why doesn't anyone use this address?
Comments
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DexterPark
Member Posts: 121
RFC 3627 - I-D Tag:
"Abstract
In some cases, the operational decision may be to use IPv6 /127 prefix lengths, especially on point-to-point links between routers. Under certain situations, this may lead to one router claiming both addresses due to subnet-router anycast being implemented. This document discusses the issue and offers a couple of solutions to the problem; nevertheless, /127 should be avoided between two routers."
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