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How far are you in the certification process?. I haven ’ t started I got the gogoCLIENT working I passed the IPv6 Web Server test I passed the IPv6 Email Server test I got further than that, perhaps to Sage or Guru. Review. How many bits are in an IPv6 address?. 8 32 64 128 256.

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how far are you in the certification process
How far are you in the certification process?
  • I haven’t started
  • I got the gogoCLIENT working
  • I passed the IPv6 Web Server test
  • I passed the IPv6 Email Server test
  • I got further than that, perhaps to Sage or Guru
the first 16 bits of an ip address are 1111 1110 1000 0000 what is that word in hex
The first 16 bits of an IP address are:1111 1110 1000 0000What is that word in hex?
  • 9870
  • 1514
  • FC00
  • FE80
  • FE90
which ipv6 address is invalid
Which IPv6 address is invalid?
  • ::
  • ::1
  • F:F:F:F:E:E:E:E
  • B:A:D:C:0:D:E
  • C:C:5:F:C:A:F:E
which ipv6 address is invalid1
Which IPv6 address is invalid?
  • DEAD:BEEF::CAFE
  • ABBA:BAD::ACDC:G00D
  • 192:168:0::1
  • 1::1
  • 2::
how is the host portion of a public ipv6 address usually determined in windows 7
How is the host portion of a public IPv6 address usually determined in Windows 7?
  • The router automatically configures it
  • It must be manually set
  • It is constructed from the MAC address
  • It is a random number
  • Something else
how is the network portion of a public ipv6 address usually determined in windows 7
How is the network portion of a public IPv6 address usually determined in Windows 7?
  • The router automatically configures it
  • It must be manually set
  • It is constructed from the MAC address
  • It is a random number
  • Something else
ipv6 client
IPv6 Client

IPv6 packets

inside IPv4 packets

register a domain name
Register a Domain Name
  • Domain registrar
    • Registers whois info
    • Assigns authoritative DNS server
    • Puts “glue records” at the top-level domain (.info, .com, etc.) with A and AAAA records of your nameservers
ipv6 web server
IPv6 Web Server

IPv6 Backbone

Native IPv6

HE.NET

HTTP GET

Native IPv6

IPv6 packets

inside IPv4 packets

IIS Server

Listening

On [::]:80

IPv6-to-IPv4

Gateway

ipv6 email server
IPv6 Email Server

IPv6 Backbone

Native IPv6

HE.NET

SMTP SEND

Native IPv6

IPv6 packets

inside IPv4 packets

James Server

Listening

On [::]:25

IPv6-to-IPv4

Gateway

3 3 ipv6 header
3.3 IPv6 Header
  • Traffic Class: same as TOS in IPv4
  • Flow Label: used for QoS
  • Next Header: can start a chain of headers
3 4 ipv6 extension headers
3.4 IPv6 Extension Headers
  • Extension headers are only examined by the destination node
    • Except for the rarely-used Hop-by-Hop Options header
most important extension headers
Most Important Extension Headers
  • TCP, UDP, ICMP6
    • Specify the higher-layer protocol
  • AH and ESP
    • Used for IPsec security
  • Mobility
    • Used for Mobile IPv6
routing header zero
Routing Header Zero
  • Deprecated, and recommended to be filtered out
    • http://www.ietf.org/rfc/rfc5095.txt
  • A denial-of-service condition is possible by specifying a malicious path, such as a loop
3 5 3 neighbor discovery
3.5.3 Neighbor Discovery
  • Main Uses
    • Autoconfiguration of IPv6 Addresses
    • Duplicate Address Detection (DAD)
    • Address Resolution (replacing ARP)
router advertisement
Router Advertisement
  • Router Solicitation (RS)
    • Sent by an interface when it is enabled and needs an IP address
  • Router Advertisement (RA)
    • Routers send these messages out, telling clients the network prefix and other configuration information
neighbor solicitation
Neighbor Solicitation
  • Neighbor Solicitation (NS)
    • A node sends this message to verify that a neighbor is still reachable, or for Duplicate Address Detection (DAD)
  • Neighbor Advertisement (NA)
    • The response to a NS message
3 5 4 autoconfiguration
3.5.4 Autoconfiguration
  • Automatic addressing via two mechanisms
    • Stateless Autoconfiguration (SLAAC)
      • No server needed
      • Routers advertise network portion
      • Hosts make up their own host portion
    • Stateful Autoconfiguration (DHCPv6)
      • Requires a DHCP server
3 5 6 path maximum transmission unit pmtu discovery
3.5.6 Path Maximum Transmission Unit (PMTU) Discovery
  • IPv4 allows each router to fragment packets if needed to pass into a network with a small MTU
  • In IPv6, only the sender can change the packet size
    • This makes the process much more efficient
path maximum transmission unit pmtu discovery
Path Maximum Transmission Unit (PMTU) Discovery
  • ICMPv6 “Packet Too Big” messages are sent to inform the source device to use smaller packets
slide39
Which of these systems decapsulates tunneled IPv6-in-IPv4 packets and sends them onto the IPv6 backbone?
  • gogoCLIENT
  • sydney.freenet6.net
  • GoDaddy
  • HE.NET
  • Your ISP
slide40

A student fails the HE Web Server test with a “could not grab the file via IPv6” message. Wireshark shows that no HTTP GET was received at their Web server. Which is the least likely explanation?

  • IIS not running
  • Firewall on
  • Incorrect AAAA record in DNS
  • gogo6 tunnel down
  • Filename incorrect
which tool shows your domain s current aaaa record
Which tool shows your domain’s current AAAA record?
  • IPCONFIG
  • NSLOOKUP
  • Wireshark
  • gogoCLIENT
  • NETSTAT
which tool shows listening ports
Which tool shows listening ports?
  • IPCONFIG
  • NSLOOKUP
  • Wireshark
  • gogoCLIENT
  • NETSTAT
which ipv6 header field was once permitted to be zero but now should never be zero
Which IPv6 header field was once permitted to be zero, but now should never be zero?
  • Traffic class
  • Flow label
  • Payload length
  • Next header
  • Hop limit
which ipv6 header field is always 6
Which IPv6 header field is always 6?
  • Traffic class
  • Flow label
  • Payload length
  • Next header
  • Version