 Slot Ports Module-Type Model Sub Status 1000BaseX Supervisor WS-X6K-SUP2-2GE yes ok Multilayer Switch Feature WS-F6K-MSFC2 no ok 1000BaseX Supervisor WS-X6K-SUP2-2GE yes standby Multilayer Switch Feature WS-F6K-MSFC2 no ok 10/100BaseTX Ethernet WS-X6348-RJ-45 no ok Configuring SVIs 10/100BaseTX Ethernet WS-X6348-RJ-45 no ok 10/100BaseTX Ethernet WS-X6348-RJ-45 no ok The first MSFC is reported as being in slot 15. This is normal when the supervisor is in slot 1, as the MSFC is a daughter card on the supervisor. The switch assigns an internal slot number to the MSFC. We can now connect to the MSFC: Catos-6509: (enable) session 15 Trying Router-15 Connected to Router-15. Escape character is '^]'. MSFC-6509> en MSFC-6509# Another way to get to the MSFC is with the switch console command. Now that we're in IOS, let's see what the MSFC thinks about the two VLANs: MSFC-6509# sho ip int brief Interface IP-Address OK? Method Status Protocol There are no SVIs active on the MSFC-not even VLAN 1. Let's add an SVI for VLAN 20 and see what happens: MSFC-6509# conf t Enter configuration commands, one per line. End with CNTL/Z. MSFC-6509(config)# int vlan 20 MSFC-6509(config-if)# ip address 10.20.20.1 255.255.255.0 MSFC-6509(config-if)# no shut MSFC-6509(config-if)# ^Z MSFC-6509# 17w2d: %LINK-3-UPDOWN: Interface Vlan20, changed state to down 17w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan20, changed state to down MSFC-6509# MSFC-6509# sho ip int brief Interface IP-Address OK? Method Status Protocol Vlan20 10.20.20.1 YES manual down The SVI is now there, but it won't come up. The SVI will not come up unless there is an active port in the VLAN in layer two. I often forget this fact and, after adding the SVIs, go off to create my VLANs only to find that none of them will come up. To illustrate the point, I'll assign an IP address to the CatOS management interface SC0, and place it in VLAN 20. This will put an active device in the VLAN: Catos-6509: (enable) set int sco 20 10.20.20.20 255.255.255.0 Interface SCO vlan set