I am using a stacked pair of 3750-X switches as the core for a network, and there is one location where I need to hook up some devices where I would like to place a local SG300-10 and use a 2 port LAG between the SG300-10. When I look at status of the LAG (Etherchannel) on the 3750-X it shows as being up. When I look at the status on the SG-300 it appears to be up. When I unplug and plug the ethernet cable I see the VLANs on the LAG go up and down from the SG300 log.
| Log Index | Log Time | Severity | Description |
| 2147483453 | 2013-Oct-31 19:11:04 | Informational | %AAA-I-CONNECT: New http connection for user cisco, source 192.168.56.112 destination 192.168.56.206 ACCEPTED |
| 2147483454 | 2013-Oct-31 19:07:23 | Informational | %AAA-I-DISCONNECT: http connection for user cisco, source 192.168.56.112 destination 192.168.56.206 TERMINATED |
| 2147483455 | 2013-Oct-31 18:57:08 | Informational | %LINK-I-Up: Vlan 3 |
| 2147483456 | 2013-Oct-31 18:57:08 | Informational | %LINK-I-Up: Po1 |
| 2147483457 | 2013-Oct-31 18:57:08 | Informational | %TRUNK-I-PORTADDED: Port gi9 added to Po1 |
| 2147483458 | 2013-Oct-31 18:57:05 | Informational | %LINK-I-Up: gi9 |
| 2147483459 | 2013-Oct-31 18:56:30 | Warning | %STP-W-PORTSTATUS: gi1: STP status Forwarding |
| 2147483460 | 2013-Oct-31 18:56:26 | Informational | %LINK-I-Up: Vlan 2 |
| 2147483461 | 2013-Oct-31 18:56:26 | Informational | %LINK-I-Up: gi1 |
| 2147483462 | 2013-Oct-31 18:54:53 | Warning | %LINK-W-Down: Vlan 3 |
| 2147483463 | 2013-Oct-31 18:54:53 | Warning | %LINK-W-Down: Vlan 2 |
| 2147483464 | 2013-Oct-31 18:54:53 | Warning | %LINK-W-Down: Po1 |
| 2147483465 | 2013-Oct-31 18:54:53 | Warning | %LINK-W-Down: gi9 |
| 2147483466 | 2013-Oct-31 18:54:53 | Warning | %TRUNK-W-PORTREMOVED: Port gi9 removed from Po1 |
I have set a couple of ports on the SG-300 to be untagged on the the VLANS and I do not get IP addresses assigned via DHCP, I plug in something statically addressed with that VLAN, and I cannot reach it. I also cannot reach the admin web pages for the switch via the trunked interface. The same configuration on the 3750-X works with the Gigabit port on Catalyst Express 520 so I think the 3750-X is configured properly.
Config Info from the SG300
LAG Config Info
VLAN Config Info
Any thoughts on where I might have gone wrong would be greatly appreciated.
Thx
Bryan
