05-05-2008 06:38 AM - edited 03-05-2019 10:46 PM
having difficulties comprehending pieces of stp. can someone expand a bit on CST vs. 802.1d From my understanding 802.1d utilizes 1-to-1 of STP instance per VLAN where CST has one instance for all VLAN's.
Any further info would be appreciated.
thankyou
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05-05-2008 07:22 AM
802.1d is the IEEE spanning-tree algorithm that prevents loops in a layer 2 network.
CST is an implmentation of 802.1d where there is only one instance of STP running for all the vlans in your layer 2 network no matter how many vlans that is.
PVST/PVST+ is an implementation of 802.1d where each vlan runs it's own instance of STP.
Jon
05-05-2008 06:59 AM
Hi
CST is common spanning-tree is a dot1q standard which maintain a single instance of STP for all the vlans.
802.1d is a ieee standard of STP.
Thanks
Mahmood
05-05-2008 07:22 AM
802.1d is the IEEE spanning-tree algorithm that prevents loops in a layer 2 network.
CST is an implmentation of 802.1d where there is only one instance of STP running for all the vlans in your layer 2 network no matter how many vlans that is.
PVST/PVST+ is an implementation of 802.1d where each vlan runs it's own instance of STP.
Jon
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