trojan81
asked on
pvst spanning tree
Experts,
Suppose I have (3) cisco 3560 switches brand new taken out of the box. I power them on and connect them to each other via trunk links. I dont do anything to the Priority so they will use their MAC's to calculate the bridge IDs. they will use PVST by default. Let's say switch 2 has the lowest MAC address. If I have 10 VLANS, can I assume bridge 2 will be the root bridge for all the VLANS?
Question #2: Does a switch need to have the "int vlan" to qualify to be a candidate for root bridge?
Please, not links explaining STP. I know what it's about and just want to clear up some dumb questions.
Suppose I have (3) cisco 3560 switches brand new taken out of the box. I power them on and connect them to each other via trunk links. I dont do anything to the Priority so they will use their MAC's to calculate the bridge IDs. they will use PVST by default. Let's say switch 2 has the lowest MAC address. If I have 10 VLANS, can I assume bridge 2 will be the root bridge for all the VLANS?
Question #2: Does a switch need to have the "int vlan" to qualify to be a candidate for root bridge?
Please, not links explaining STP. I know what it's about and just want to clear up some dumb questions.
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SVI (Switched Virtual Interface) as the name implies is a virtual interface and can be layer 2 or layer 3. This is on every switch by default.I guess that would depend on one's definition of "SVI". I have never heard of anyone using that term to describe anything other than a VLAN interface.
VLAN = Virtual Local Area Network
SVI = Switched Virtual Interface
The interface VLANs use is Virtual because they themselves are virtual, but are not by themselves SVI
By Layer 2 or 3, I meant "can be on layer 2 or layer 3 switch".
It allows the switch to function in OSI layer 3, (tcp/ip)
When you assign a management ip address to a switch for telnetting or SSHing for example, (whether on a L2 or L3 switch), you are using the SVI
Please keep it simple.
SVI = a Virtual Interface on a Switch (VIS if you will).
Interface is a platform for exchange
http://www.cisco.com/en/US/prod/collateral/routers/ps5853/prod_white_paper0900aecd8064c9f4.html
SVI = Switched Virtual Interface
The interface VLANs use is Virtual because they themselves are virtual, but are not by themselves SVI
By Layer 2 or 3, I meant "can be on layer 2 or layer 3 switch".
It allows the switch to function in OSI layer 3, (tcp/ip)
When you assign a management ip address to a switch for telnetting or SSHing for example, (whether on a L2 or L3 switch), you are using the SVI
Please keep it simple.
SVI = a Virtual Interface on a Switch (VIS if you will).
Interface is a platform for exchange
http://www.cisco.com/en/US/prod/collateral/routers/ps5853/prod_white_paper0900aecd8064c9f4.html
By Layer 2 or 3, I meant "can be on layer 2 or layer 3 switch".The omission of the word "on" is rather significant.
Sorry about that. Down side of auto text on iphones
SVI (Switched Virtual Interface) as the name implies is a virtual interface and can be layer 2 or layer 3. This is on every switch by default.