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Author(s) Olivier Bonaventure
Deadline No deadline
Submission limit No limitation
Category tags IPv6

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The IPv6 forwarding table

A router contains a forwarding table that lists for each IPv6 prefix either the interface associated to this prefix if it is directly connected or the nexthop to reach this prefix. Consider a router that has the following forwarding table:

2001:db8:1341::/48, via nexthop1
2001:db8:1341:2000/51, via nexthop5
2001:db8:1341:2000/64, interface1
2001:db8:1341:4000/50, via nexthop2
2001:db8:1341:5000/52, nexthop3
2001:db8:1341:7000/64, interface2
2001:db8:1341:5555/64, interface3
2001:db8::/32 via nexthop4
::/0 via nexthop0

Provide your answer by indicating nexthop3, interface9, ...


Question 1: Packet

How will the router forward a packet sent towards 2001:bad:cafe::1234 ?

Question 2: Packet

How will the router forward a packet sent towards 2001:db8:1342:5555::1 ?

Question 3: Packet

How will the router forward a packet sent towards 2001:db8:1341:3000::1234 ?

Question 4: Packet

How will the router forward a packet sent towards 2001:db8:1341:6000::cafe:beef ?

Question 5: Packet

How will the router forward a packet sent towards 2001:db8:1341:5000::f00f:beef ?