Use the command Remarks Enter system view system-view — Enter interface view interface interface-type interface-number — Configure the interface to automatically generate an IPv6 link-local address ipv6 address auto link-local Optional By default, no link-local address is configured on an interface. Remarks Enter system view system-view — Enter interface view interface interface-type interface-number — Configure an IPv6 link-local address manually ipv6 address ipv6-address link-local Optional By default, no link-local address is configured on an interface.
NOTE: An interface can have one link-local address only. Configure the interface to automatically generate an IPv6 link-local address. Optional By default, no link-local address is configured on an interface.
The link-local address as the name implies, is specific only to that local network. In other words, the routers can have the same link-local address and still the directly connected network can communicate with each other without any conflict.
This will not be the same in case of global unicast address. The global unicast address being routable should be unique in a network. The show ipv6 interface brief command shows the information about link-local address on the interface.
In this example, R1 and R3 are assigned with the same link-local address and R2 can still reach both the routers by specifying the corresponding output interface. Note: The R2 can ping the link-local address of R1 and R3 only because they are directly connected. R2 cannot ping the link-local address of the loopback interfaces in routers R1 and R3 as they are not directly connected.
Ping works on link-local addresses only in case of directly connected networks. This is because IPv6 routers must not forward packets that have link-local source or destination addresses to other links. I think they are wrong and if not please correct me by telling me why is it the 6th bit? The 7nth bit is fliped. So, if in the mac address there is a 1 in the 7nth position of the 8 bits, then the 1 becomes a 0 and if it is a 0 instead of a 1, it becomes a 1 in the 7nth position.
Thanks very much. Im a beginer to subnetting. Correct me if i am wrong. Im doing CCNA1 in cisco. Many zeros do indeed equal to double column but this is for abbreviation purposes; meaning that fully writing each 0 is legal as well. Thanks for this … I was wondering if anyone has tried an excel formulae for this and if they would care to share.
Use this a lot martin. Per your suggestion, here it is. I hope this helps. Hey, can please put the Skript on github or something like that. Did you post this with your actual email address? I could send you the meat of the script.
Read the question, the guy wants the mac derived form the link local, not using a local command. Your email address will not be published. Notify me via e-mail if anyone answers my comment.
Unicast addresses can be sub-classified further into four types, as shown in Table Each unicast address type is defined as follows:. An anycast address is not necessarily a subnet-router anycast address and can also function as a global unicast address.
IPv6 addresses do not include broadcast addresses. In IPv6, multicast addresses can provide the functions of broadcast addresses. According to the classification of IPv6 addresses, an IPv6 link-local address is a type of IPv6 unicast address and is often called a link-local IPv6 unicast address.
IPv6 link-local addresses are only used for communication between nodes on the same local link. After IPv6 is enabled on a node and the system is enabled to automatically generate an IPv6 link-local address or a global IPv6 unicast address is manually configured, an IPv6 link-local address is automatically assigned to each interface on the node.
This mechanism enables two IPv6 nodes on a link to communicate with each other without any additional configuration. Therefore, IPv6 link-local addresses are widely used in scenarios, such as neighbor discovery and stateless address configuration. Routing devices do not forward IPv6 packets with an IPv6 link-local address as a source or destination address to devices on different links.
Figure shows the format of an IPv6 link-local address.
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