Half duplex - Revision history

Pbug at 17:28, 9 August 2009

2009-08-09T17:28:52Z

← Older revision		Revision as of 10:28, 9 August 2009
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	Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what [[full duplex]] provides. [[Ethernet]] [[~~hub~~]]s are half duplex, always.		Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what [[full duplex]] provides. [[Ethernet]] [[hubs]] are half duplex, always.

Pbug at 19:29, 13 October 2005

2005-10-13T19:29:51Z

← Older revision		Revision as of 12:29, 13 October 2005
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	Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides. [[Ethernet]] [[hub]]s are half duplex, always.		Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what [[full duplex]] provides. [[Ethernet]] [[hub]]s are half duplex, always.

Pbug at 19:29, 13 October 2005

2005-10-13T19:29:15Z

← Older revision		Revision as of 12:29, 13 October 2005
Line 1:		Line 1:
	Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides. [[Ethernet]] [[hub]]s are half duplex, always.		Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides. [[Ethernet]] [[hub]]s are half duplex, always.



			=== Forcing an interface into half duplex mode ===

			In [[OpenBSD]] you can see the media modes with the [[ifconfig]] command:

			$ ifconfig -m xl0
			xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
			lladdr 00:60:08:5a:86:82
			media: Ethernet 100baseTX full-duplex
			status: no carrier
			supported media:
			media none
			media 10baseT
			media 10baseT mediaopt full-duplex
			media 100baseTX
			media 100baseTX mediaopt full-duplex
			media autoselect
			inet 172.16.2.2 netmask 0xfffffe00 broadcast 172.16.3.255
			inet6 fe80::260:8ff:fe5a:8682%xl0 prefixlen 64 scopeid 0x2

			To then change it to half duplex mode you would type:

			$ ifconfig xl0 media 10baseT

			In [[Linux]] you'd use [[mii-tool]] to do this.

Pbug at 19:16, 13 October 2005

2005-10-13T19:16:25Z

← Older revision		Revision as of 12:16, 13 October 2005
Line 1:		Line 1:
	Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides. [[~~Hub~~]]s are half duplex, always.		Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides. [[Ethernet]] [[hub]]s are half duplex, always.

Pbug at 19:15, 13 October 2005

2005-10-13T19:15:56Z

← Older revision		Revision as of 12:15, 13 October 2005
Line 1:		Line 1:
	Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides.		Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides. [[Hub]]s are half duplex, always.

Pbug at 19:14, 13 October 2005

2005-10-13T19:14:10Z

New page

Half duplex means that 1 channel is used for communication. Sending data must be synchronized with receiving data and it's possible that both ends of the communication try to send data at the same time causing a collision. The aggregate bandwidth of a 100 Mbps link is 100 Mbps. This is half of what full-duplex provides.