Switch on Wrong VLAN? - Page 2

townofnewmarket · ‎08-19-2009

I have about 6 3560s in my network. At one site, they are in VLAN11, and on one switch, I have a 2950 plugged into one of the ports. Anyone hanging on the 2950 is getting IPs from VLAN12...why?

The configuration of the 3560 port with the 2950 off it is like this:

interface FastEthernet0/14

description Connection Cisco 2950

switchport access vlan 11

Any idea what's wrong here? (Obviously I have a fiber trunking port connecting to VLAN12, so that's how the 2950 is getting those 12 addys).

Jon Marshall · ‎08-22-2009

Doug

I'm not sure we are solving this.

If you only want vlan 11 to be present on the 2950 switch then the connection does not need to be a trunk to the 3560. It just needs to be what you have currently configured.

If you are using hyperterm to connect via the console you can actually capture the output into a text file so you can do a "sh run" and have this saved to a file.

Basically to get to the bottom of this we need to know -

1) Which switch is routing for vlan 11 - at the moment we seem to be saying it is the 3560 that is not connected to the 2950.

2) What are the DHCP scopes ie. subnet and subnet mask for vlan 11 & vlan 12

3) Can you post the output of

"sh cdp neighbor" from the 2950 and the 3560 that the 2950 is connected to.

4) the output of

"sh vlan" from the 2950

5) Ideally the configuration of all 3 switches but at a minimum the full config of the 3560 that is connected to the 2950 and the 2950.

I mentioned the bit about hyperterm as this should help you post the switch configs.

Jon

Mohitkumarp · ‎08-25-2009

Can you Post the LAN Diagram with ip address mentioned here and also the sh run on the uplink port on all the switches + sh run of the interface from all the switches ( one specific port that is having problem)

townofnewmarket · ‎09-03-2009

My apologies for being so late with this. I was on vacation for a couple of weeks. So to get back to this, I have attached a quick and dirty network diagram. To answer your questions:

1. The 3560G does all the VLAN routing. The 3560G is in a diff building, connected by fiber.

2. For the 11, the scope is 192.168.11.100-200, with subnet of 255.255.255. The 12 scope is the same, just 192.168.12.100-200.

3. From the 2950:

switch-2950>sho cdp neigh

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID

Switch-3560-2 Fas 0/17 128 S I WS-C3560-2Fas 0/14

From the 3560 (just for Fa0/14):

switch-2950 Fas 0/14 177 T S WS-C2950T-Fas 0/17

4. Sh vlan from 2950:

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Gi0/1, Gi0/2

5 Voice active

6 Voiceservers active

9 Mgmt active

10 Accounting active

11 Main active Fa0/1, Fa0/2, Fa0/3, Fa0/4,

Fa0/5, Fa0/6, Fa0/7, Fa0/8,

Fa0/9, Fa0/10, Fa0/11, Fa0/12,

Fa0/13, Fa0/14, Fa0/15, Fa0/16,

Fa0/18, Fa0/19, Fa0/20, Fa0/21,

Fa0/22, Fa0/23, Fa0/24

12 Data active

1002 fddi-default active

1003 token-ring-default active

1004 fddinet-default active

1005 trnet-default active

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------

1 enet 100001 1500 - - - - - 0 0

5 enet 100005 1500 - - - - - 0 0

6 enet 100006 1500 - - - - - 0 0

9 enet 100009 1500 - - - - - 0 0

10 enet 100010 1500 - - - - - 0 0

11 enet 100011 1500 - - - - - 0 0

12 enet 100012 1500 - - - - - 0 0

1002 fddi 101002 1500 - 0 - - - 0 0

1003 tr 101003 1500 - 0 - - srb 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

The PC plugged into the 2950, Win XP, type "ipconfig /all" and one of the settings says

DHCP Server 192.168.12.49

I originally set this PC up in my office where the 12 network is. Is this something I need to wipe out in the registry??

Let me know if you need anything else to help me out here! I appreciate it!

townofnewmarket · ‎09-03-2009

My apologies for being so late with this. I was on vacation for a couple of weeks. So to get back to this, I have attached a quick and dirty network diagram. To answer your questions:

1. The 3560G does all the VLAN routing. The 3560G is in a diff building, connected by fiber.

2. For the 11, the scope is 192.168.11.100-200, with subnet of 255.255.255. The 12 scope is the same, just 192.168.12.100-200.

3. From the 2950:

switch-2950>sho cdp neigh

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID

Switch-3560-2 Fas 0/17 128 S I WS-C3560-2Fas 0/14

From the 3560 (just for Fa0/14):

switch-2950 Fas 0/14 177 T S WS-C2950T-Fas 0/17

4. Sh vlan from 2950:

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Gi0/1, Gi0/2

5 Voice active

6 Voiceservers active

9 Mgmt active

10 Accounting active

11 Main active Fa0/1, Fa0/2, Fa0/3, Fa0/4,

Fa0/5, Fa0/6, Fa0/7, Fa0/8,

Fa0/9, Fa0/10, Fa0/11, Fa0/12,

Fa0/13, Fa0/14, Fa0/15, Fa0/16,

Fa0/18, Fa0/19, Fa0/20, Fa0/21,

Fa0/22, Fa0/23, Fa0/24

12 Data active

1002 fddi-default active

1003 token-ring-default active

1004 fddinet-default active

1005 trnet-default active

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------

1 enet 100001 1500 - - - - - 0 0

5 enet 100005 1500 - - - - - 0 0

6 enet 100006 1500 - - - - - 0 0

9 enet 100009 1500 - - - - - 0 0

10 enet 100010 1500 - - - - - 0 0

11 enet 100011 1500 - - - - - 0 0

12 enet 100012 1500 - - - - - 0 0

1002 fddi 101002 1500 - 0 - - - 0 0

1003 tr 101003 1500 - 0 - - srb 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

The PC plugged into the 2950, Win XP, type "ipconfig /all" and one of the settings says

DHCP Server 192.168.12.49

I originally set this PC up in my office where the 12 network is. Is this something I need to wipe out in the registry??

Let me know if you need anything else to help me out here! I appreciate it!

townofnewmarket · ‎09-03-2009

My apologies for being so late with this. I was on vacation for a couple of weeks. So to get back to this, I have attached a quick and dirty network diagram. To answer your questions:

1. The 3560G does all the VLAN routing. The 3560G is in a diff building, connected by fiber.

2. For the 11, the scope is 192.168.11.100-200, with subnet of 255.255.255. The 12 scope is the same, just 192.168.12.100-200.

3. From the 2950:

switch-2950>sho cdp neigh

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID

Switch-3560-2 Fas 0/17 128 S I WS-C3560-2Fas 0/14

From the 3560 (just for Fa0/14):

switch-2950 Fas 0/14 177 T S WS-C2950T-Fas 0/17

4. Sh vlan from 2950:

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Gi0/1, Gi0/2

5 Voice active

6 Voiceservers active

9 Mgmt active

10 Accounting active

11 Main active Fa0/1, Fa0/2, Fa0/3, Fa0/4,

Fa0/5, Fa0/6, Fa0/7, Fa0/8,

Fa0/9, Fa0/10, Fa0/11, Fa0/12,

Fa0/13, Fa0/14, Fa0/15, Fa0/16,

Fa0/18, Fa0/19, Fa0/20, Fa0/21,

Fa0/22, Fa0/23, Fa0/24

12 Data active

1002 fddi-default active

1003 token-ring-default active

1004 fddinet-default active

1005 trnet-default active

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------

1 enet 100001 1500 - - - - - 0 0

5 enet 100005 1500 - - - - - 0 0

6 enet 100006 1500 - - - - - 0 0

9 enet 100009 1500 - - - - - 0 0

10 enet 100010 1500 - - - - - 0 0

11 enet 100011 1500 - - - - - 0 0

12 enet 100012 1500 - - - - - 0 0

1002 fddi 101002 1500 - 0 - - - 0 0

1003 tr 101003 1500 - 0 - - srb 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

The PC plugged into the 2950, Win XP, type "ipconfig /all" and one of the settings says

DHCP Server 192.168.12.49

I originally set this PC up in my office where the 12 network is. Is this something I need to wipe out in the registry??

Let me know if you need anything else to help me out here! I appreciate it!