[STP] Other than RP, DP and Blocking port on Switch
missingplugin
Registered Users Posts: 1 ■□□□□□□□□□
in CCNA & CCENT
Its a very basic question i guess, A switch has Root Port, Designated Port, Or Blocking Port, but all these three kind applies when a Switch is Connected to another Switch, isn't it?
How about those ports which connects directly to host, Do those ports works Normal i.e not any one of the three modes, is that so?
How about those ports which connects directly to host, Do those ports works Normal i.e not any one of the three modes, is that so?
Comments
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Chard26
Member Posts: 49 ■■□□□□□□□□
In STP, the cables that are connected to each switch will be set up as trunk ports which STP needs to function. All the other ports will be access ports or normal ports functioning as they would without STP enabled (if that makes sense )
Cheers
Chard -
bermovick
Member Posts: 1,135 ■■■■□□□□□□
STP still runs on access ports though - ports connected to end hosts will be in a forwarding state (they'll be designated ports)Latest Completed: CISSP
Current goal: Dunno -
CodeBlox
Member Posts: 1,363 ■■■■□□□□□□
As stated above, they will be designated ports on access ports. This is because they forward the least-cost BPDU onto that segment ( the host doesn't forward any ). Or so the legend goes.Currently reading: Network Warrior, Unix Network Programming by Richard Stevens -
DragonNOA1
Member Posts: 149 ■■■□□□□□□□
missingplugin wrote: »...but all these three kind applies when a Switch is Connected to another Switch, isn't it?
Yes, it applies when connecting to another switch as well. That port could be forwarding or blocking, and could be pointing to or away from the root (root port).The command line, an elegant weapon for a more civilized age -
bon_chan
Member Posts: 21 ■□□□□□□□□□
I am getting confused.I thought that ports connected to end hosts were called non-designated ports(they'll be designated ports) -
Monkerz
Member Posts: 842
No, a non-designated port is a port in a blocking state. Ports connected to hosts are designated ports.
Watch this flash animation, maybe it will help clear some things up. http://www.cisco.com/image/gif/paws/10556/spanning_tree1.swf -
Arpawocky
Registered Users Posts: 2 ■□□□□□□□□□
Holy moly. Thanks for posting this. A couple light bulbs just went off in my head.No, a non-designated port is a port in a blocking state. Ports connected to hosts are designated ports.
Watch this flash animation, maybe it will help clear some things up. http://www.cisco.com/image/gif/paws/10556/spanning_tree1.swf -
SubnetZero
Member Posts: 124
missingplugin wrote: »How about those ports which connects directly to host, Do those ports works Normal i.e not any one of the three modes, is that so?
Just to echo what everyone else has already said...
Designated ports are put into a forwarding state after going through the listening > learning states (if you want to bypass this turn on portfast)
Non-designated ports are blocking and don't forward frames, however, they do listen-for and receive BPDU's
HTH
While no trees were harmed in the transmission of this message, several electrons were severely inconvenienced :cool:
