Topology Discovery - revision history

Dank: /* Inferring Topology */

2011-12-22T07:34:59Z

Inferring Topology

← Older revision		Revision as of 07:34, 22 December 2011
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	==Inferring Topology==		==Inferring Topology==
			==See Also==
			* Wireshark's entries for [http://wiki.wireshark.org/LinkLayerDiscoveryProtocol LLDP]
	[[CATEGORY: Networking]]		[[CATEGORY: Networking]]

Dank: /* Explicit Protocols */

2011-12-22T07:33:42Z

Explicit Protocols

← Older revision		Revision as of 07:33, 22 December 2011
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	==Explicit Protocols==		==Explicit Protocols==
	===Cisco Discovery Protocol (CDP)===		===Cisco Discovery Protocol (CDP)===
			===Link-Layer Discovery Protocol (LLDP)===
			IEEE Standard 802.1AB-2005. It operates directly atop Ethernet, using protocol number 0x88cc, or over SNAP-encoded LLC with the discriminator aa:aa:03:00:00:00. The LLDP multicast destination address is 01:80:c2:00:00:0e.
	===Link-Local Topology Discovery (LLTD) Protocol===		===Link-Local Topology Discovery (LLTD) Protocol===
	A [http://msdn.microsoft.com/en-us/windows/hardware/gg463061.aspx Microsoft protocol] native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.		A [http://msdn.microsoft.com/en-us/windows/hardware/gg463061.aspx Microsoft protocol] native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.

Dank: /* LLTD Packet Format */

2011-12-14T08:43:56Z

LLTD Packet Format

← Older revision		Revision as of 08:43, 14 December 2011
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	A [http://msdn.microsoft.com/en-us/windows/hardware/gg463061.aspx Microsoft protocol] native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.		A [http://msdn.microsoft.com/en-us/windows/hardware/gg463061.aspx Microsoft protocol] native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.
	====LLTD Packet Format====		====LLTD Packet Format====
	* Ethernet header (14 bytes):
	{\| class="wikitable" border="1"		{\| class="wikitable" border="1"
			\|-
	! Field		! Field
	! Size		! Size
			! Value
			\|-
			\| colspan="3" align="center" \| '''Ethernet header (14 bytes)'''
	\|-		\|-
	\| Destination MAC		\| Destination MAC
	\| 6 ~~bytes~~		\| 6 octets
			\|
	\|-		\|-
	\| Source MAC		\| Source MAC
	\| 6 ~~bytes~~		\| 6 octets
			\|
	\|-		\|-
	\| Protocol		\| Protocol
	(0x88d9 in [[Endianness\|NBO]])		\| 2 octets
	\| 2 ~~bytes~~		\| 0x88d9 in [[Endianness\|NBO]]
			\|-
			\| colspan="3" align="center" \| '''LLTD Demux Header (4 bytes)'''
			\|-
			\| Version
			\| 1 octet
			\| 1
			\|-
			\| Type of Service
			\| 1 octet
			\|
			*0: Topology Discovery
			*1: Quick Discovery
			*2: QoS Diagnostics
			\|-
			\| Reserved
			\| 1 octet
			\| Must be set to 0 by sender
			Must be ignored by receiver
			\|-
			\| Function
			\| 1 octet
			\| Specific to Type of Service values
			\|-
	\|}		\|}

Dank: /* Link-Local Topology Discovery (LLTD) Protocol */

2011-12-14T08:28:18Z

Link-Local Topology Discovery (LLTD) Protocol

@@ Line 5: / Line 5: @@
 ===Link-Local Topology Discovery (LLTD) Protocol===
 A [http://msdn.microsoft.com/en-us/windows/hardware/gg463061.aspx Microsoft protocol] native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.
 ==Inferring Topology==
 [[CATEGORY: Networking]]

Dank: /* Link-Local Topology Discovery (LLTD) Protocol */

2011-12-12T06:18:43Z

Link-Local Topology Discovery (LLTD) Protocol

← Older revision		Revision as of 06:18, 12 December 2011
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	===Cisco Discovery Protocol (CDP)===		===Cisco Discovery Protocol (CDP)===
	===Link-Local Topology Discovery (LLTD) Protocol===		===Link-Local Topology Discovery (LLTD) Protocol===
	A Microsoft protocol native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.		A [http://msdn.microsoft.com/en-us/windows/hardware/gg463061.aspx Microsoft protocol] native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.

	==Inferring Topology==		==Inferring Topology==

	[[CATEGORY: Networking]]		[[CATEGORY: Networking]]

Dank at 06:13, 12 December 2011

2011-12-12T06:13:31Z

← Older revision		Revision as of 06:13, 12 December 2011
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	A Microsoft protocol native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.		A Microsoft protocol native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.
	==Inferring Topology==		==Inferring Topology==

			[[CATEGORY: Networking]]

Dank: Created page with "Topology discovery refers to the determination of a network's nodes and links. Explicit topology discovery typically works via either expanding enumeration of broadcast domain..."

2011-12-12T06:13:09Z

Created page with "Topology discovery refers to the determination of a network's nodes and links. Explicit topology discovery typically works via either expanding enumeration of broadcast domain..."

New page

Topology discovery refers to the determination of a network's nodes and links. Explicit topology discovery typically works via either expanding enumeration of broadcast domains or successive queries of authorities. The former requires that broadcasts/multicasts be routed beyond the immediate broadcast domain; the latter requires a system of authorities. Implicit topology discovery has no particular protocol support, but makes use of a combination of techniques to expand knowledge of topology. This tends not to proceed as quickly, nor be as locally complete, as explicit methods, but can be applied more generally than explicit discovery. The two can be combined, as performed by tools such as [[omphalos]].

==Explicit Protocols==
===Cisco Discovery Protocol (CDP)===
===Link-Local Topology Discovery (LLTD) Protocol===
A Microsoft protocol native to Windows Vista and supported on Windows XP via add-on. It operates directly atop Ethernet, using protocol number 0x88D9.
==Inferring Topology==