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../../exercises/ipv6.rst:6
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IPv6 Networks
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../../exercises/ipv6.rst:9
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Basic questions on IPv6 Networks
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../../exercises/ipv6.rst:11
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Before starting to determine the paths that packets will follow in an IPv6 network, it is important to remember how to convert IPv6 addresses in binary numbers.
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../../exercises/ipv6.rst:15
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An IPv6 forwarding table contains a list of IPv6 prefixes with their associated nexthop or outgoing interface. When an IPv6 router receives a packet, it forwards it according to its forwarding table. Note that IPv6 routers forward packets along the *longest match* between the destination address of the packet and the routes in the forwarding table.
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../../exercises/ipv6.rst:20
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Now that you master the basics, you can determine the paths followed by IPv6 packets in simple networks.
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../../exercises/ipv6.rst:31
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Design questions
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../../exercises/ipv6.rst:33 • ../../exercises/ipv6.rst:142
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Consider the network shown in the figure below. In this network, the following addresses are used.
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../../exercises/ipv6.rst:35 • ../../exercises/ipv6.rst:144 • ../../exercises/ipv6.rst:222
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host ``A`` : ``2001:db8:1341:1::A`` and its default route points to ``2001:db8:1341:1::1``
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../../exercises/ipv6.rst:36 • ../../exercises/ipv6.rst:145 • ../../exercises/ipv6.rst:223
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host ``B`` : ``2001:db8:1341:4::B`` and its default route points to ``2001:db8:1341:4::4``
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../../exercises/ipv6.rst:38 • ../../exercises/ipv6.rst:147 • ../../exercises/ipv6.rst:225
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The routers have one address inside each network :
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../../exercises/ipv6.rst:40 • ../../exercises/ipv6.rst:149
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router ``R1`` uses address ``2001:db8:1341:1::1`` on its West interface, address ``2001:db8:1341:12::1`` on its East interface and address ``2001:db8:1341:13::1`` on its South interface
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../../exercises/ipv6.rst:41
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router ``R2`` uses address ``2001:db8:1341:12::2`` on its West interface, address ``2001:db8:1341:23::2`` on its South-West interface and address ``2001:db8:1341:24::2`` on its South interface.
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../../exercises/ipv6.rst:42
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router ``R3`` uses address ``2001:db8:1341:34::3`` on its East interface, address ``2001:db8:1341:23::3`` on its North-East interface and address ``2001:db8:1341:13::3`` on its North interface
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../../exercises/ipv6.rst:43 • ../../exercises/ipv6.rst:152
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router ``R4`` uses address ``2001:db8:1341:34::4`` on its West interface, address ``2001:db8:1341:24::4`` on its North interface and address ``2001:db8:1341:4::4`` on its East interface
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../../exercises/ipv6.rst:45
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The forwarding paths used in a network depend on the forwarding tables installed in the network nodes. Sometimes, these forwarding tables must be configured manually.
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../../exercises/ipv6.rst:91
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In this network, propose the forwarding tables of ``R2`` and ``R3`` that ensure that hosts ``A`` and ``B`` can exchange packets in both directions.
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../../exercises/ipv6.rst:94
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Consider the same network as in the previous question, but now the forwarding tables of ``R2`` and ``R3`` are configured as shown below :
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../../exercises/ipv6.rst:139
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In this network, select `all` the rules in the shown forwarding tables that ensure that the packets sent from ``A`` to ``B`` follow the reverse path of the packets sent by ``B`` to ``A``.
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../../exercises/ipv6.rst:150 • ../../exercises/ipv6.rst:228
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router ``R2`` uses address ``2001:db8:1341:12::2`` on its West interface, and address ``2001:db8:1341:24::2`` on its South interface
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../../exercises/ipv6.rst:151 • ../../exercises/ipv6.rst:229
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router ``R3`` uses address ``2001:db8:1341:34::3`` on its East interface and address ``2001:db8:1341:13::3`` on its North interface
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