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Ipv6 link-local - Cisco Community 1) Can I say tht local-link address is just local significance. Therefore every site/router can configure the same link-local address. like router is FE80::8300:500:1:1 and core switch is FE80::8300:500:1:2. It will not conflict. 2)Can I say every interfaces in a router can also configure the same link-local address? IPv6 deployment: Using IPv6 link-local addresses as Aug 07, 2013 networking - What is a link-local address? - Server Fault
The address space allocated to link-local addresses is fe80::/10, but the next 54 bits are defined to be all zeroes, so the effective range is fe80::/64. Which puts it in line with the usual custom for IPv6 addresses. RFC 4291: 2.5.6. Link-Local IPv6 Unicast Addresses Link-Local addresses are for use on a single link.
Which address is a valid IPv6 link-local unicast address? Explanation: IPv6 LLAs are in the fe80::/10 range. The /10 indicates that the first 10 bits are 1111 1110 10xx xxxx. The first hextet has a range of 1111 1110 IPv4/IPv6 subnet calculator and addressing planner
Using a prefix other than fe80 for a link-local address can result in unexpected behaviors. Although permitted by the RFC 4291, using a prefix other than fe80 should be tested prior to usage. In Chapter 6 we will examine the structure, uses, and configuration options for link-local addresses in much more detail.
Solved: ipv6 address and link-local address - Cisco Community here we know router#2 has local-link address FE80::C201:65FE:FE02:0 . But router 2 did not advertise its link-local address to router 1. Router 2 did not have to do that. Remember that Router 2 sent its RIPng message sourced from its link-local address. It is the very same as with RIP in IPv4 - it also does not have to advertise the particular ipv6 - Why is fe80::/10 reserved for link local addresses I think the link-local scope was set to /10 simply to "fit in" better with the other scopes, e.g. site-local (before it was replaced with unique local). Initially I had thought maybe it was to allow the use of many link-local networks on the same link, but RFC 4291 explicitly states that only fe80::/64 may be used. IPv6 address - Wikipedia fe80:: / 10 — Addresses in the link-local prefix are only valid and unique on a single link (comparable to the auto-configuration addresses 169.254.0.0 / 16 of IPv4). Within this prefix only one subnet is allocated (54 zero bits), yielding an effective format of fe80:: / 64 .
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