Core issue
In a 4500 switch with Supervisor 5 (Sup V-10GE), when active and redundant supervisor engines are installed in the same chassis, these four uplink ports are available:
- Gig1/1
- Gig2/1
- Gig 1/2
- Gig2/2
In other words, two GigabitEthernet ports of the active supervisor, 1/1 and 1/2, are available as well as two of the standby supervisor, 2/1 and 2/2.
Resolution
These are the reasons when two Supervisor Engine V-10GEs are present in a Catalyst 4510R or Catalyst 4507R switch:
For 10-Gigabit Ethernet Uplink Ports, one X2 uplink is active on both the primary (active) and secondary (standby) supervisor engines by default, or two uplinks are active in a nonredundant configuration.
For Gigabit Ethernet SFP Uplink Ports, two SFP uplinks are active on both the primary (active) and secondary (standby) supervisor engines by default, or four uplinks are active in a nonredundant configuration.
Refer to the Supervisor Engine V-10GE section of document Installation and Configuration Note for the Catalyst 4500 Series Supervisor Engine V-10GE for more information.
