looking for a couple of hints from you
we have a small but peculiar networking need: - 3 vlans, that are to be propagated among two L2 switches - we need to partition the vlans as much as possible, with the goal of
keeping latency as much as indipendent as possible
(one vlan traffic shouln't be able at all of "choking" the other ones, despite the heavy traffic)
we have two cisco sg 300 (28p) available, we had the idea of using
3 dedicated wires (one for each vlan) between the 2 switches
instead of using the usual "one-wire, trunk ports" layout.
we tried to implement it using both trunk and access mode ports, and dedicating a MST instance to house each vlan
but unfortunately, still, the switches seem to detect loops and one or more ports go (and stay) in Blocked status.
currently this is the situation
- SwitchA_Port2 (access, VLAN2), connected through a dedicated wire to SwitchB_Port2 (access, VLAN2)
- SwitchA_Port3 (access, VLAN3), connected through a dedicated wire to SwitchB_Port3 (access, VLAN3)
- SwitchA_Port4 (access, VLAN4), connected through a dedicated wire to SwitchB_Port4 (access, VLAN4)
plus each switch has active the default VLAN1
- MST1 <-> VLAN1
- MST2 <-> VLAN2
- MST3 <-> VLAN3
- MST4 <-> VLAN4
on each switch, and the ids are matching.
unfortunately, i think that using a 3-wire link aggregation would not be the same, since it would "balance" the frames on the three wires, failing to achieve a real latency partitioning
can you suggest us what to look for to understand what we're doing wrong?
thanks a lot