Link-Local IPv6 Address - Revision history

Heth at 14:28, 15 June 2011

2011-06-15T14:28:25Z

Heth at 07:32, 13 June 2011

2011-06-13T07:32:16Z

Heth at 06:01, 13 June 2011

2011-06-13T06:01:52Z

Heth at 09:08, 12 June 2011

2011-06-12T09:08:12Z

Heth: Link Local IP-v6 Address moved to Link-Local IPv6 Address

2011-06-12T08:37:41Z

Link Local IP-v6 Address moved to Link-Local IPv6 Address

Heth at 08:14, 12 June 2011

2011-06-12T08:14:07Z

Heth at 08:13, 12 June 2011

2011-06-12T08:13:21Z

Heth at 08:08, 12 June 2011

2011-06-12T08:08:57Z

Heth at 08:06, 12 June 2011

2011-06-12T08:06:49Z

Heth at 08:06, 12 June 2011

2011-06-12T08:06:27Z

@@ Line 16: / Line 16: @@
 Routers must not forward IPv6 packets if the source or destination contains a link-local address.
 }}
 ==IPv6 Link-Local Addresses==
 Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.
 [[Image:Link-Local Address Windows 7.PNG|left|400px|thumb|Windows 7 Link-Local Address Example]]
 [[Image:Link-Local IPv6 address.png|500px|float|thumb|Format of Link-Local address]]
 <source lang=cli>
 IPv6#<input>sh ipv6 int fa0/0</input>
@@ Line 43: / Line 48: @@
    Hosts use stateless autoconfig for addresses.
 </source>
 {{Source cli}}
 ==Example why originating interface is important==

@@ Line 16: / Line 16: @@
 Routers must not forward IPv6 packets if the source or destination contains a link-local address.
 }}
-=IPv6 Link-Local Addresses=
+==IPv6 Link-Local Addresses==
 Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.
 [[Image:Link-Local Address Windows 7.PNG|left|400px|thumb|Windows 7 Link-Local Address Example]]
@@ Line 44: / Line 44: @@
 </source>
 {{Source cli}}
-=Example why originating interface is important=
+==Example why originating interface is important==
 Notice in the example below, we telnet to the Heimdal Router - the very same we're on - even I know that the Link-Local address FE80::218:18FF:FE7C:B440 is on a neighboring Router called Campus1.
 <source lang=cli>

← Older revision		Revision as of 06:01, 13 June 2011
Line 44:		Line 44:
	</source>		</source>
	{{Source cli}}		{{Source cli}}
		+	=Example why originating interface is important=
		+	Notice in the example below, we telnet to the Heimdal Router - the very same we're on - even I know that the Link-Local address FE80::218:18FF:FE7C:B440 is on a neighboring Router called Campus1.
		+	<source lang=cli>
		+	<notice>Heimdal</notice>#<input>telnet FE80::218:18FF:FE7C:B440</input>
		+	Trying FE80::218:18FF:FE7C:B440 ... Open
		+	!!!Netadmin Please upgrade the network security!!!
		+	banner motd
		+
		+	User Access Verification
		+
		+	Password:
		+	<notice>Heimdal</notice>><input>exit</input>
		+
		+	[Connection to FE80::218:18FF:FE7C:B440 closed by foreign host]
		+	</source>
		+	Link-Local addresses are local on a link. We need to tell on which interface the Link-Address are on. First we need to find the interface on which the address resides.
		+	<source lang=cli>
		+	Heimdal#<input>show ipv6 neighbor \| inc B440</input>
		+	FE80::218:18FF:FE7C:B440 0 0018.187c.b440 STALE <notice>Vl1</notice>
		+	</source>
		+	In the output in previous command, it's seen that the Link-Local address lives in Vlan1. Now we telnet from that source-interface - and Voila everything works as expected.
		+	<source lang=cli>
		+	<notice>Heimdal</notice>#<input>telnet FE80::218:18FF:FE7C:B440 /source-interface vlan1</input>
		+	Trying FE80::218:18FF:FE7C:B440 ... Open
		+	!!!Netadmin please upgrade Network Security!!!
		+	banner motd
		+
		+	User Access Verification
		+
		+	Password:
		+	<notice>Campus1</notice>>
		+	</source>
		+	[[Category:CiscoIPv6]]

@@ Line 7: / Line 7: @@
   |Example         = FE80::21B:D4FF:FE0F:8CA2
   |CompareIPv4     = 169.254.0.0/16 Link-Local
   |Explanation     = These addresses are used on a single link or a non-routed common access network, such as an Ethernet LAN.

@@ Line 17: / Line 17: @@
 =IPv6 Link-Local Addresses=
 Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.
-[[Image:Link-Local Address Windows 7.PNG|left|300px|thumb|Windows 7 Link-Local Address]]
+[[Image:Link-Local Address Windows 7.PNG|left|400px|thumb|Windows 7 Link-Local Address Example]]
 [[Image:Link-Local IPv6 address.png|500px|float|thumb|Format of Link-Local address]]
 <source lang=cli>

← Older revision	Revision as of 08:37, 12 June 2011
(No difference)

← Older revision		Revision as of 08:08, 12 June 2011
Line 18:		Line 18:
	Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.		Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.
	[[Image:Link-Local IPv6 address.png\|500px\|float\|thumb\|Format of Link-Local address]]		[[Image:Link-Local IPv6 address.png\|500px\|float\|thumb\|Format of Link-Local address]]
		+	<source lang=cli>
		+	IPv6#<input>sh ipv6 int fa0/0</input>
		+	FastEthernet0/0 is up, line protocol is up
		+	IPv6 is enabled, <notice>link-local address is FE80::21B:D4FF:FE0F:8CA2</notice>
		+	No Virtual link-local address(es):
		+	Description: Outside: Internet connection to ISP
		+	Global unicast address(es):
		+	2001:16D8:DD85:146::2, subnet is 2001:16D8:DD85:146::/64
		+	Joined group address(es):
		+	FF02::1
		+	FF02::2
		+	FF02::D
		+	FF02::16
		+	FF02::1:FF00:2
		+	FF02::1:FF0F:8CA2
		+	MTU is 1500 bytes
		+	ICMP error messages limited to one every 100 milliseconds
		+	ICMP redirects are enabled
		+	ICMP unreachables are sent
		+	ND DAD is enabled, number of DAD attempts: 1
		+	ND reachable time is 30000 milliseconds
		+	Hosts use stateless autoconfig for addresses.
		+	</source>
		+	{{Source cli}}

← Older revision		Revision as of 08:06, 12 June 2011
Line 17:		Line 17:
	=IPv6 Link-Local Addresses=		=IPv6 Link-Local Addresses=
	Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.		Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are ''not'' Routeable.
		+	[[Image:Link-Local IPv6 address.png\|300px\|float\|thumb\|Format of Link-Local address]]