3Com 3CR17561-91-US - Switch 4500 26PORT Managed 24 10/100 2 Gbe Stackable..., Руководство по началу работы, Страница: 65 / 128

Unit Numbering within the Stack 65
■
When a port is operating in stack mode it will no longer be
configurable in the normal way, that is, you cannot control port
features such as auto-negotiation, VLANs, static addresses, STP,
Aggregated Links, Resilient Links, and so on. However, it is possible to
specify the stack VLAN.
Figure 22 Stack example (using 4 units)
Unit Numbering
within the Stack
When a stack is created using the Switch 4500 the unit numbering can
be determined in two ways.
■
You can manually assign unit IDs 1 to 8 to specific units using the
c
hange[self-unit, unit-id] to [1-8,
auto-numbering]
command from the System View. If you
manually assign unit IDs to a Switch via the
change
command the IDs
will be retained after a power cycle.
If you add a unit to a stack that has previously been manually
configured with a unit ID and this conflicts with an ID already within
the stack, then the Switch with the lowest MAC address assumes the
ID in question and the other unit will automatically renumber.
3Com recommends that you manually assign the unit IDs within the stack
if you wish to have predictability of knowing which units have which IDs
at all times.
■
Stack topology is ‘discovered’ and the units auto-number their IDs.
Adding and removing units from the stack does not cause any
renumbering to occur and the stack will continue to work normally.
3 C R17561-91 SuperSt ac k 3 Swit c h 4500 26-Por t
1000BASE-X
10/100BASE-TX
10/100/1000BASE-T
Speed: (100B a se-TX) Gr een = 100M b ps Ye llow = 10M b ps (1000B a se-X) Green = 1000M b ps Ye llow = 10/100M b ps Duplex: Green = Full Duplex, Ye llow = H a lf Duplex
26 25 25 26
3 C R17561-91 SuperSt ac k 3 Swit c h 4500 26-Por t
1000BASE-X
10/100BASE-TX
10/100/1000BASE-T
Speed: (100B a se-TX) Gr een = 100M b ps Ye llow = 10M b ps (1000B a se-X) Green = 1000M b ps Ye llow = 10/100M b ps Duplex: Green = Full Duplex, Ye llow = H a lf Duplex
26 25 25 26
3 C R17561-91 SuperSt ac k 3 Swit c h 4500 26-Por t
1000BASE-X
10/100BASE-T X
10/100/1000BASE-T
Speed: (100B a se-TX) Gr een = 100M b ps Ye llow = 10M b ps (1000B a se-X) Green = 1000M b ps Ye llow = 10/100M b ps Duplex: Green = Full Duplex, Ye llow = H a lf Duplex
26 25 25 26
3 C R17562-91 SuperSt ac k 3 Swit c h 4500 50-Por t
PWR
RPS
Duplex:Gr een = Full Duplex, Ye llow = H a lf Duplex Speed:Gr een = 100M b ps, Ye llow = 10M b ps
49 50
49
50
2
25
2