ipv4 vs ipv6 addressing format
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*ipv6 hexadecimal xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx
2 char = 1 byte
RFC 2373
ipv6 address space
aggregatable global unicast address
001
link-local unicast address
1111 1110 10
site-local unicast address
1111 1110 11
multicast address
1111 1111
ipv6 address space
Global unicast 2000 3fff (2001) (2002 automatic 64 tunnel space )
Site Local FEC0
link- local FE80
Multicast FF
Modified EUI-64 Addressing
ipv6 host addresses are generated from interface MAC address
MAC address is 48 bits
IPv6 host address is 64-bits
Extra 16 bits derived as follows:
-MAC 1234.5678.9012
-Invert 7th most singificant bit
1034.5678.9012
insert "FFFE" in middle 1034:56FF:FE78:9012
(ca00.1044.0008)
conf)#ipv6 unicast-routing
conf)#int fa0/0
conf-if)#no sh
conf-if)#do sh ipv6 interface fa0/0
FE80::C800:10FF:FE44:8
conf-if)#do sh int fa0/0
conf-if)#mac-address 1234.4567.8901
FE80::1034:56FF:FE78:9012
ICMPv6 Neighbour Discovery
NS-Neighbour Solicitation
-ask for information abour neibhor
NA - Neighbour Advertisement
- Advertise yourself to other neighbors
RS - Router Solicitation
-Ask for information about local routers
RA - Router Advertisement
-Advertise yourself as an active router
IPv6 lab :
conf)#logging buffer
#debug ipv6 packets
#debug ipv6 nd
conf)#ipv6 unicast-routing
conf)#int fa0/0
conf-if)#ipv6 enable
conf)#int fa1/0
conf-if)#ipv6 enable
one(config-if)#ipv6 enable
one(config-if)#
IPV6: source :: (local)
dest FF02::16 (FastEthernet0/1)
traffic class 224, flow 0x0, len 76+0, prot 0, hops 1, originating
IPv6: Sending on FastEthernet0/1
IPV6: source :: (local)
dest FF02::16 (FastEthernet0/1)
traffic class 224, flow 0x0, len 76+0, prot 0, hops 1, originating
IPv6: Sending on FastEthernet0/1
IPV6: source :: (local)
dest FF02::16 (FastEthernet0/1)
traffic class 224, flow 0x0, len 76+0, prot 0, hops 1, originating
IPv6: Sending on FastEthernet0/1
ICMPv6-ND: Sending NS for FE80::C800:10FF:FE44:6 on FastEthernet0/1
IPV6: source :: (local)
dest FF02::1:FF44:6 (FastEthernet0/1)
traffic class 224, flow 0x0, len 64+16, prot 58, hops 255, originating
IPv6: Sending on FastEthernet0/1
one(config-if)#do sh ipv6 int bri
FastEthernet0/0 [up/up]
FE80::1034:56FF:FE78:9012
FastEthernet0/1 [up/up]
FE80::C800:10FF:FE44:6
one(config-if)#do sh ipv6 route
IPv6 Routing Table - 2 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
L FE80::/10 [0/0]
via ::, Null0
L FF00::/8 [0/0]
via ::, Null0
two(config-if)#do sh ipv6 int fa0/0
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::C801:10FF:FE44:8
No global unicast address is configured
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF44:8
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
one(config-if)#do ping FE80::C801:10FF:FE44:8
Output Interface: fastethernet 0/0
% Invalid interface. Use full interface name without spaces (e.g. Serial0/1)
Output Interface: fastethernet0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::C801:10FF:FE44:8, timeout is 2 seconds:
Packet sent with a source address of FE80::1034:56FF:FE78:9012
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/80/168 ms
one(config-if)#int fa0/0
one(config-if)#no ipv
one(config-if)#no ipv6 add
one(config-if)#ipv
one(config-if)#ipv6 add 2001:210:10:1::/64 ?
anycast Configure as an anycast
eui-64 Use eui-64 interface identifier
<cr>
one(config-if)#ipv6 add 2001:210:10:1::/64 eui-64
one(config-if)#no sh
one(config-if)#do sh ipv6 int fa0/0
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::1034:56FF:FE78:9012
Global unicast address(es):
2001:210:10:1:1034:56FF:FE78:9012, subnet is 2001:210:10:1::/64 [EUI]
Joined group address(es):
FF02::1
FF02::2
FF02::1:FF78:9012
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND router advertisements are sent every 200 seconds
ND router advertisements live for 1800 seconds
Hosts use stateless autoconfig for addresses.
one(config-if)#do sh int fa0/0 | in bia
Hardware is i82543 (Livengood), address is 1234.5678.9012 (bia ca00.1044.0008)
STATELESS AUTO-CONFIGURATION
two(config-if)#ipv6 address autoconfig
two(config-if)#do sh ipv6 int bri
FastEthernet0/0 [up/up]
FE80::C801:10FF:FE44:8
FastEthernet0/1 [up/up]
two(config-if)#do sh ipv6 int bri
FastEthernet0/0 [up/up]
FE80::C801:10FF:FE44:8
2001:210:10:1:C801:10FF:FE44:8
FastEthernet0/1 [up/up]
two(config-if)#do sh int | in bia
Hardware is i82543 (Livengood), address is ca01.1044.0008 (bia ca01.1044.0008)
Hardware is i82543 (Livengood), address is ca01.1044.0006 (bia ca01.1044.0006)
two(config-if)#do sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.12.1.2 - ca01.1044.0008 ARPA FastEthernet0/0
Internet 30.1.1.1 - ca01.1044.0006 ARPA FastEthernet0/1
two(config-if)#do sh ipv6 nei
IPv6 Address Age Link-layer Addr State Interface
FE80::1034:56FF:FE78:9012 9 1234.5678.9012 STALE Fa0/0
one(config-if)#no ipv6 add
one(config-if)#ipv6 add 2001:210:10:1::1/64
one(config-if)#do sh ipv6 add
sh ipv6 add
^
% Invalid input detected at '^' marker.
one(config-if)#do sh ipv6 int bri
FastEthernet0/0 [up/up]
FE80::1034:56FF:FE78:9012
2001:210:10:1::1
FastEthernet0/1 [up/up]
FE80::C800:10FF:FE44:6
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