Using the same phone and pc on both ports

Ports 2 and 29 are configured the same in sh run

Port 2 gives a 10.1.1.x to phone and pc

Port 29 gives a 10.1.101.x to phone and pc

When doing a sh vlan brief port 2 is not associated with either vlan, and port 29 is associated with both vlans

According to cisco network assistant security is shut off on both ports


0 Comments   [ + ] Show Comments


Please log in to comment

Community Chosen Answer


Check your DHCP settings.  This can happen in several ways.  A few things I can think of:

1. Port 2 isn't associated with the VLANs, while port 29 is, so they reach different DHCP servers.  The DHCP servers have different configurations.

2. You have a group of DHCP servers, and one is configured with a different DHCP range.  Your phone and PC are already associated with the respective servers, so they are granted the same IPs.

3. The port security / VLANs are different for the DHCP server connections.

3. Your configurations look the same in sh run, but either there is a detail missing, or they are configured differently upstream somewhere.

  If you aren't finding much working from the client end, you may want to start with the DHCP servers they are getting a response from and work from that direction.

Answered 06/11/2012 by: philologist
Red Belt

Please log in to comment



i don't suppose you feel like posting a snippet of your config?

Answered 06/11/2012 by: lcadhelpdesk
Second Degree Blue Belt

Please log in to comment

Yes, please post the config.  Do both PC and phone use the same VLAN, or is there a voice VLAN in the config?

Answered 06/14/2012 by: mdri
Blue Belt

Please log in to comment
Answer this question or Comment on this question for clarity