that distance is too far for stacking. Both the Stacking module and 10GE CX4 module can be configured to either role (Ethernet or Stacking). By default, each module functions according to its module ID. Upon changing the role of a module, a reboot is required for the change to take effect. However I believe the max distance for the stacking cables is around 3 meters. And the CX4 cable limit is 15 meters.  The other modules for the back of the switch are a 10GBase-T, part # X901C. The 10GBase-T module will only install into Bay 2 (right bay when viewing from the back). And a 10GE SFP+ module, part # U691D. The combo ports on the front of the switch are 1GB SFP ports. Combo ports have a combined input and output to and from the PHY chip. Only the optical port or the RJ-45 port cab be used singly, but not at the same time. Whichever cable is connected first will have use of the port PHY.  The fiber option that should fit your needs is a SFP-1G-SX transceiver. This transceiver uses LC multimode fiber and is good to 550m. part # 407-BBOR [URL] Here is a document that goes over the available module options.  [URL] With switch to switch connections involving multiple VLANs, you will want to use Trunk mode connections. For switch to switch connections you do not want to use portfast.  # interface port-channel 1 # switchport mode Trunk # switchport Trunk allwed vlan add 2,3,4,5,6 I hope this helps answer some of your questions.
Good morning all! I currently have 2x PC6248's that are stacked with YY741 stacking module and 2x Dell F4XF-F4XF 1 meter cables between them and it's all working fine.  # show stack-port indicates that xg1 and xg2 are in use on both switches while xg3 and xg4 are both down.  This is what I'd expect. I need to add two more switches but they are going to be at quite a distance away.  The first would be approximately 15 meters away and the second would be somewhere between 75 and 100 meters away.  Can I use F4XF-F4XF cables that long to 'stack' the switches and if so, where can I find cables of that length?  If I can do this, can I get away with just 1 cable to the remote switches?  (Yes, I know it would only be a 12GB inter-connect). If the above answer is no, then can I put 2x gbic's in the xg3/xg4 ports on both the existing switches and and 4x gbic's in xg1-xg4 on the new switches and connect cross-connect the two new switches over LC-LC fiber going that length?  (Yes, I know xg1/xg2 are not usable in the existing stack).  If I can do it this way, what gbic's would I want to get?  Can I use any LC-LC gbic or are there specific gbic's I should use?  And, how would I configure all the switches?  I do have multiple vlan's in the existing stack.  My config is attached below (if you see any errors, feel free to say so lol), it's pretty basic.  All the ports in chassis #1 are in use with a few on chassis #2.  Currently, with only the 2 switches in the stack, everything is working perfectly.  console#show run!Current Configuration:!System Description "PowerConnect 6248, 3.3.13.1, VxWorks 6.5"!System Software Version 3.3.13.1!Cut-through mode is configured as disabled!configurevlan databasevlan 2-3,252,254vlan routing 1 1vlan routing 254 2vlan routing 3 3vlan routing 252 4vlan routing 2 5vlan association subnet 192.168.0.0 255.255.255.0 1vlan association subnet 192.168.1.0 255.255.255.0 2vlan association subnet 192.168.2.0 255.255.255.0 3vlan association subnet 192.168.252.0 255.255.255.0 252vlan association subnet 192.168.254.0 255.255.255.252 254exitsntp unicast client enablesntp server 192.168.0.2                     clock timezone -7 minutes 0 zone "MST"stackmember 1 2member 2 2exitip address 192.168.254.1 255.255.255.252ip domain-name lhcfun.localip name-server 8.8.8.8ip name-server 8.8.4.4ip name-server 198.105.254.17ip name-server 192.168.0.2ip routingip route 0.0.0.0 0.0.0.0 192.168.1.2ip helper-address 192.168.0.2 dhcpip helper-address 192.168.0.2 ntpinterface vlan 1routingip address 192.168.0.1 255.255.255.0exitinterface vlan 2name "Firewall"                     routingip address 192.168.1.1 255.255.255.0exitinterface vlan 3name "iSCSI"routingip address 192.168.2.1 255.255.255.0exitinterface vlan 252name "Console Ports"routingip address 192.168.252.1 255.255.255.0ip helper-address 192.168.0.2 dhcpexitinterface vlan 254name "Management"routingexitusername "admin" password 20b269eca6cf2aa9fb7ff4f4d0460dad level 15 encryptedspanning-tree priority 0dhcp l2relay                     !interface ethernet 1/g1switchport access vlan 252exit!interface ethernet 1/g2channel-group 2 mode autoexit!interface ethernet 1/g3channel-group 2 mode autoexit!interface ethernet 1/g4channel-group 1 mode autoexit!interface ethernet 1/g5channel-group 1 mode autoexit!                     interface ethernet 1/g6channel-group 1 mode autoexit!interface ethernet 1/g7channel-group 1 mode autoexit!interface ethernet 1/g8switchport access vlan 252exit!interface ethernet 1/g11channel-group 3 mode autoexit!interface ethernet 1/g12channel-group 3 mode autoexit!interface ethernet 1/g13                     channel-group 3 mode autoexit!interface ethernet 1/g14channel-group 3 mode autoexit!interface ethernet 1/g15switchport access vlan 252exit!interface ethernet 1/g18channel-group 4 mode autoexit!interface ethernet 1/g19channel-group 4 mode autoexit!interface ethernet 1/g20channel-group 4 mode auto                     exit!interface ethernet 1/g21channel-group 4 mode autoexit!interface ethernet 1/g22switchport access vlan 252exit!interface ethernet 1/g23channel-group 5 mode autoexit!interface ethernet 1/g24channel-group 5 mode autoexit!interface ethernet 1/g25channel-group 6 mode autoswitchport access vlan 3                     exit!interface ethernet 1/g26channel-group 6 mode autoswitchport access vlan 3exit!interface ethernet 1/g27channel-group 6 mode autoswitchport access vlan 3exit!interface ethernet 1/g28channel-group 6 mode autoswitchport access vlan 3exit!interface ethernet 1/g29switchport access vlan 252exit!                     interface ethernet 1/g32channel-group 7 mode autoexit!interface ethernet 1/g33channel-group 7 mode autoexit!interface ethernet 1/g34channel-group 7 mode autoexit!interface ethernet 1/g35channel-group 7 mode autoexit!interface ethernet 1/g36switchport access vlan 252exit!interface ethernet 1/g39                     channel-group 8 mode autoexit!interface ethernet 1/g40channel-group 8 mode autoexit!interface ethernet 1/g41channel-group 8 mode autoexit!interface ethernet 1/g42channel-group 8 mode autoexit!interface ethernet 1/g43switchport access vlan 252exit!interface ethernet 1/g44channel-group 9 mode auto                     exit!interface ethernet 1/g45channel-group 9 mode autoexit!interface ethernet 1/g46switchport access vlan 252exit!interface ethernet 2/g47switchport access vlan 252exit!interface ethernet 2/g48switchport access vlan 2exit!interface port-channel 1description "nas20"spanning-tree portfast                     exit!interface port-channel 2description "nas20port22"spanning-tree portfastexit!interface port-channel 3description "vmw16"spanning-tree portfastexit!interface port-channel 4description "vmw18"spanning-tree portfastexit!interface port-channel 5description "nas24"spanning-tree portfastexit                     !interface port-channel 6description "nas24iscsi vlan 3"spanning-tree portfastswitchport access vlan 3exit!interface port-channel 7description "vmw28"spanning-tree portfastexit!interface port-channel 8description "vmw30"spanning-tree portfastexit!interface port-channel 9description "tsm32"spanning-tree portfastexit                     exit
Connecting Multiple 6248's