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

Extreme uses tagged and I untagged instead of trunk/access, so it would look like this for a trunk:

conf vlan test add port gi1 tagged
(and of course you could put other VLAN's on this same port too since it's a trunk)
conf vlan user1 add port gi1 tagged

and this for handoff:

conf vlan lam test add port fa1 untagged

Virtual Local Area Network (VLAN) technology logically divides a physical LAN into multiple broadcast domains, each of which is called a VLAN.
Each VLAN functions as a separate broadcast domain, with devices in the same VLAN able to directly communicate with one another, while those in different VLANs cannot. As a result, broadcast packets are confined within a single VLAN.

try pinging it again and restart it i hope this will work thank you for using fixya! have a great day(dont forget to vote or rate me)

Create the same VLAN on all the switches that will need this VLAN. All ports that link to another switch should have ALL VLAN's set to tagged.
This one VLAN should not have an IP address on any of your switches. This way it won't get routed by any of your users.

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.

VLANs:
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
switch vlan set 2 1~10:X 11~12:FU enet1~enet2:FT VLAN2
switch vlan set 10 1~10:FU 11~12:X enet1~enet2:FT VLAN10
switch vlan set 17 1~12:X enet1~enet2:FT VLAN17
switch vlan pvid 1~10 10
switch vlan pvid 11~12 2
switch vlan pvid enet1~enet2 1
switch vlan priority * 0
switch vlan gvrp * disable
switch vlan frametype * all
switch vlan cpu set 1

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.

you want to give IPs to your VLANs and also make physical interfaces members of a VLAN instead of giving IPs to physical interfaces

yellow light on ports means the port is not working or was shutdown due to port security

i can't set ip address over 4 vlans. the 3com switch 4500 always give error message "there's not enough routing resources available".please help....

%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.