All:
Design question per my attached diagram:
Overall Design: A REP ring segment that terminates into a pair of STP/Dot1Q trunk (EtherChannel etc.) interconnected Layer3 HSRP switches.
( Note: I haven't had a chance to test this in the lab; early next week, still in the planning Phase)
Questions:
1) Does the REP admin VLAN have any communication / signaling use over the Dot1Q trunk? Hypothetically: Would REP LSL PDUs sent/received only on REP ports?
2) Are there any platform-specific limitations about versions/mode of SPANNING TREE with which STCN can integrate? MSTP? PVSTP+? RSTP+?
3) I have found in the Community Forums archives questions from others who chose to design their Inter-HSRP aggregation switch connection as a REP Segment instead of Dot1Q/STP
Does anyone have experience? Are there advantages?
For me, I would chose Dot1Q/STP every time for two reasons:
1) To ensure HSRP messaging never has to switch / transmit more than one Layer1/Layer2 hop
(And not flowing around the ring, because of the ALT port blocking direct communication between AGG1 and AGG2)
2) To allow use of EtherChannel to obtain aggregated/redundant link between core/aggregation
(Can a REP run acrross EtherChannel/LAG/LACP?)
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