vlan issue

csco11257494 · ‎03-14-2013

Hi,

I am having an issue two diff switches both running on 3 diff vlans and both are connected together. e.g vlan 10, 20 and 30

this 3 vlans are configured on the two switches that are connected to each other and could ping each vlans having configured the ports of the

two switches connected to trunk and having all ports in each vlan connectint to a pc to be in access but those pcs canot ping other vlans the could only ping them selfs even the switch could not ping the PC IP succesfully.

thank you would appreciate any help

Gregory Snipes · ‎03-14-2013

Please post up scrubbed configs for these devices. This will be a much easier way to determine what any issues with these devices are.

csco11257494 · ‎03-14-2013

FOR SW A

spanning-tree mode pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

interface FastEthernet1/0/1

switchport mode access

!

interface FastEthernet1/0/2

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/3

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/4

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/5

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/6

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/7

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/8

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/9

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/10

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/11

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/12

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/13

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/14

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/15

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/16

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/17

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/18

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/19

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/20

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/21

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/22

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/23

switchport trunk encapsulation dot1q

switchport mode access

!

interface FastEthernet1/0/24

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/1

description link to AGGRSW2

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface GigabitEthernet1/0/2

!

interface Vlan1

no ip address

!

interface Vlan105

ip address 192.168.1.1 255.255.255.224

!

interface Vlan120

ip address 192.168.1.33 255.255.255.224

!

interface Vlan250

ip address 192.168.1.65 255.255.255.224

!

ip classless

ip http server

ip http secure-server

FOR SW B

interface GigabitEthernet1/0/1

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/2

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/3

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/4

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/5

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/6

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/7

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/8

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/9

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/10

switchport access vlan 105

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/11

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/12

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/13

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/14

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/15

switchport access vlan 120

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/16

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/17

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/18

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/19

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/20

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/21

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/22

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/23

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/24

switchport access vlan 250

switchport trunk encapsulation dot1q

switchport mode access

!

interface GigabitEthernet1/0/25

description link to AGGRSW1

switchport trunk encapsulation dot1q

switchport mode trunk

!

interface GigabitEthernet1/0/26

!

interface GigabitEthernet1/0/27

!

interface GigabitEthernet1/0/28

!

interface Vlan1

no ip address

!

interface Vlan105

ip address 192.168.1.2 255.255.255.224

!

interface Vlan120

ip address 192.168.1.34 255.255.255.224

!

interface Vlan250

ip address 192.168.1.66 255.255.255.224

!

csco11257494 · ‎03-14-2013

PCs config in vlan 105

ip add 192.168.1.10, S/M:255.255.255.224, D.G:192.168.1.1

PCs config in vlan 120

IP add 192.168.1.34, S/M:255.255.255.224 D.G 192.168.1.32

Gregory Snipes · ‎03-14-2013

PC in VLAN 120 has a duplicate IP to one of the switches.

I belive you want to change the IP on the second switch to:

interface Vlan120

ip address 192.168.1.32 255.255.255.224

Gregory Snipes · ‎03-14-2013

This is a fairly simple config and I do not see any issues with it assuming that they are properly connected together port g1/0/1 to port g1/0/25.

Things to check:

1. Do the vlans exist in both switches "Sh VLAN"

2. Is IP routing enabled, just put "IP routing" into each one for good measure

3. Check the client IP configurations

4. Do a "Sh CDP nei" just to verify layer 2

5. Ensure the hosts are connected to the correct ports

csco11257494 · ‎03-14-2013

all seems to be fine i have checked all you said but i cant just figure out why vlan 105 is not pinging vlan 120

AGGRSW2#sh cdp nei

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

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

D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID Local Intrfce Holdtme Capability Platform Port ID

AGGRSW1 Gig 1/0/25 137 R S I WS-C3750V Gig 1/0/1

AGGRSW2#

csco11257494 · ‎03-14-2013

VLAN Name Status Ports

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

1 default active Gi1/0/26, Gi1/0/27, Gi1/0/28

105 uservlan active Gi1/0/1, Gi1/0/2, Gi1/0/3

Gi1/0/4, Gi1/0/5, Gi1/0/6

Gi1/0/7, Gi1/0/8, Gi1/0/9

Gi1/0/10

120 facility active Gi1/0/11, Gi1/0/12, Gi1/0/13

Gi1/0/14, Gi1/0/15

150 VLAN0150 active

250 IASsecurity active Gi1/0/16, Gi1/0/17, Gi1/0/18

Gi1/0/19, Gi1/0/20, Gi1/0/21

Gi1/0/22, Gi1/0/23, Gi1/0/24

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

1004 fddinet-default act/unsup

1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

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

1 enet 100001 1500 - - - - - 0 0

105 enet 100105 1500 - - - - - 0 0

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2

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

120 enet 100120 1500 - - - - - 0 0

150 enet 100150 1500 - - - - - 0 0

250 enet 100250 1500 - - - - - 0 0

1002 fddi 101002 1500 - - - - - 0 0

1003 tr 101003 1500 - - - - - 0 0

1004 fdnet 101004 1500 - - - ieee - 0 0

1005 trnet 101005 1500 - - - ibm - 0 0

Gregory Snipes · ‎03-14-2013

^Please see my reply to your client configs.^

csco11257494 · ‎03-14-2013

sorry the ipp add is 192.168.1.39 (not .34) it was a mistake

Gregory Snipes · ‎03-14-2013

The gateway is pointed at .32 and there is no .32. You will either need to change the switch IP to .32 or point your gateway at .34.

csco11257494 · ‎03-14-2013

this is it the ip is 192.168.1.39 255.255.255.224 gateway:192.168.1.34 this is the right config

Gregory Snipes · ‎03-14-2013

If you put both clients in the same VLAN/subnet can they ping each other?

csco11257494 · ‎03-14-2013

will try that

csco11257494 · ‎03-14-2013

they cant ping each other even in the same vlan