SG 200 - 08 p - PC connection and phones

Hello

We have a serious problem here with some new firmware for switches 200 - 08 p SG: 1.0.6.2

They are installed behind layer 2 switches 2 SG - 200 50 - real firmware 1.3.2.02.

We have 4 VLANS: 1 for 2 for the PHONE, the RPF MGMNT 10 and 20 for CUSTOMERS - and DATA on the VLAN only 08 P 1 + 2 is required. CDR protocoll is active.

Ports 1-7 on the P-08 is configured as 'Trunk, 1U, 2 t,' setting: Auto negotiation WE. We tried FlowControl ON and - makes no difference. 8 port is configured as "Trunk, 1U, 2 t, 10 t" switch of the floor. The connection port on the floor switch configuration ist 50-switch of SG - 200 as "Trunk, 1U, 2 t, 10 t".

One of the problem switches: on 1-4 08-p port is connected 4 phones Cisco 6921. On the 5-7 Port is connected 1 HP Z400 and 2 Elite 7200 PCs. 6921 phones is switching to a laptop DELL Latitude 6420.

It so happens every morning, the first fixed PC ist works fine, then the switch must be turned to get the next PC connected to the network. Switching 6921 phone does not connect. But after a few more switching market of this walk.

We thried another material 08-P with the same configuration, we tried an older firmware level... we configure ports PoE-phone as GENERAL 1U, 2 T. We gave to external power for phones that PoE is not overloaded... nothing doesn't. Only a few switching/disable help and the PC gets its address IP of the DHCP server and phones all come a discovery of the 6000 CU.

Is there an outside person who can lend a hand on this?

Thank you so far...

Hi Mr. Jens-Peter,.

I would try to disable smartports and ethernet green on SG200 switches.  Then you have to encode each of the ports to have the necessary settings.  Often when a reboot is required to restore the feature smartports is the cause.

Regarding 6921 phones, you need to be sure to have auto voice vlan enabled.  Otherwise, the phones won't be able to pick up the VLAN correct via CDP.  Let me know, if you have any questions.

-Good Trent

* Please note the useful messages! **

Tags: Cisco Support

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