Question about Cisco Catalyst 2950 24x10/100 Mbps Networking Switch

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Switch port i have created vlan in 2950 switch but sometime one of the port turns into orange instead of green.

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Switch setting
int f0/1
speed 100
dup full


and lan card shuld be shud be more then 100mbps or 1gb
then it will conect to full duplex means


u have to to any device shud have same duplex

Posted on Feb 24, 2010

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What this normally means is that the data is being streamed at 10 MBPS (orange light) and not 100 MBPS (green light), so check your network cards speed.

Posted on Aug 11, 2007

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This is likely an ethernet auto-negotiation problem between the switchport and the connected device. If you want this to stop, try hardcoding the switchport to 100full:
int f0/1
speed 100
dup full

then try hardcodeing the connected device to 100full. Usually auto-negotiation works between devices, but not always.

Posted on Nov 09, 2007

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Going through the GUI would take too long, so use CLI to add the commands below. After that, check the GUI and see how those changes appear.

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On all equipment use 802.1q tagging. The example below puts adsl ports 1 to 10 in vlan10 and ports 11-12 in vlan2. These vlans are 802.1q tagged on the ethernet ports.

switch vlan set 1 1~12:X enet1~enet2:FT DEFAULT
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switch vlan gvrp * disable
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ATM circuit:
Each port requires one or more VPI/VCI circuit. You could map different circuits to corresponding vlans. The config below creates a primary circuit 1/35 on each port. On ports 5 and 9 is another circuit 1/32 mapped to vlan10

adsl pvc set * 1 35 super DEFVAL
adsl pvc set 5,9 1 32 10 0 DEFVAL

Remember a dslam is just a switch, bridging packets from a VC onto a VLAN or straight onto ethernet.

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1 Answer

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%SYS-4-P2_WARN: 1/Tag 0 The switch generates %SYS-4-P2_WARN: 1/Tag 0… messages.
This example shows the syslog output that you see when this error occurs:
%SYS-4-P2_WARN: 1/Tag [dec] on packet from [ether] port [chars],
but port's native vlan is [dec] This message indicates that an 802.1Q-tagged packet was received on a nontrunk port. The VLAN that is derived from the packet tag is different from the port native VLAN. In the error message:
  • The Tag [dec] is the VLAN identifier from the packet.
  • The [ether] is the host MAC address.
  • The port [chars] is the port identifier.
  • The second [dec] is the native VLAN number.
There is a possibility that the local port is incorrectly configured as an access port instead of a trunk port. Alternately, the remote side can have been configured as a trunk port instead of an access port.
Verify that the local port is not incorrectly configured as an access port instead of a trunk port. Also, verify that the remote side is not configured as a trunk port instead of an access port.

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