Bedienungsanleitung ZyXEL Nebula LTE3301-PLUS (Seite 339 von 361) (Englisch)

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Appendix C IPv6

Nebula Mobile Router User’s Guide

339

receives a neighbor advertisement in response, it stores the neighbor’s link-layer address in the neighbor

cache. When the Zyxel Device uses a router solicitation message to query for a router and receives a

router advertisement message, it adds the router’s information to the neighbor cache, prefix list and

destination cache. The Zyxel Device creates an entry in the default router list cache if the router can be

used as a default router.

When the Zyxel Device needs to send a packet, it first consults the destination cache to determine the

next hop. If there is no matching entry in the destination cache, the Zyxel Device uses the prefix list to

determine whether the destination address is on-link and can be reached directly without passing

through a router. If the address is unlink, the address is considered as the next hop. Otherwise, the Zyxel

Device determines the next-hop from the default router list or routing table. Once the next hop IP

address is known, the Zyxel Device looks into the neighbor cache to get the link-layer address and sends

the packet when the neighbor is reachable. If the Zyxel Device cannot find an entry in the neighbor

cache or the state for the neighbor is not reachable, it starts the address resolution process. This helps

reduce the number of IPv6 solicitation and advertisement messages.

Multicast Listener Discovery

The Multicast Listener Discovery (MLD) protocol (defined in RFC 2710) is derived from IPv4's Internet

Group Management Protocol version 2 (IGMPv2). MLD uses ICMPv6 message types, rather than IGMP

message types. MLDv1 is equivalent to IGMPv2 and MLDv2 is equivalent to IGMPv3.

MLD allows an IPv6 switch or router to discover the presence of MLD listeners who wish to receive

multicast packets and the IP addresses of multicast groups the hosts want to join on its network.

MLD snooping and MLD proxy are analogous to IGMP snooping and IGMP proxy in IPv4.

MLD filtering controls which multicast groups a port can join.

MLD Messages

A multicast router or switch periodically sends general queries to MLD hosts to update the multicast

forwarding table. When an MLD host wants to join a multicast group, it sends an MLD Report message

for that address.

An MLD Done message is equivalent to an IGMP Leave message. When an MLD host wants to leave a

multicast group, it can send a Done message to the router or switch. The router or switch then sends a

group-specific query to the port on which the Done message is received to determine if other devices

connected to this port should remain in the group.

Example – Enabling IPv6 on Windows 10

Windows 10 supports IPv6 by default. DHCPv6 is also enabled when you enable IPv6 on a Windows 10

computer.

To enable IPv6 in Windows 10:

1Click the start icon, Settings and then Network & Internet.

2Select the Internet Protocol Version 6 (TCP/IPv6) checkbox to enable it.

3Click OK to save the change.

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