Cisco 3750 intrervlan routing not working

[letal1609]

Hello,

I've defined 3 vlans on my 3750 switch. I've also enabled the routing on it. It is a standalone switch.

But the routing is not working between the vlans.

I don't know what to do .

I've attached the running-config

[Bernhard82]

What faulting have you done to identify this issue?

[paul driver]

Hello

Your configuration looks like it should work -

First of all you don't need the ip helpers or portfast on the SVI's as the switch itself is providing dhcp for vlans 2-3 but not 4 and these a virtual interfaces not physical

Do your hosts receive an ip address from dhcp or from a statically configured host can they ping there own default gateway ( ie the switch SVI ip address)?

Can you ping the hosts from the switch?

Sh ip arp
sh sdm prefer

res
Paul

[chrihussey]

To add to Paul's post, spanning-tree portfast should be configured on the L2 interfaces so that hosts can more easily acquire a DHCP address.

[exabite1371]

hi 

first of all if you config switch to run PVST+ 

you assume that you config e.g previous ver of STP wich have all features backbonefast,portfast and....

second

portfast is layer 2 features of STP protocol

please note:

in your switch add command

spanning-tree mode pvst+

or maybe it works as pvst+

no problem

please delete portfast from your all line that you add before

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pay attention that

if you want to use switch layer 3 as routing in 1 interface like that

use command no switchport

to bring out from layer 2 and work on layer 3 properly.....

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so are you set your client to use SVI(that config in your 3750) as gateway?

say exact problem?

why you mean don't work properly?

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and can your client take an ip address from your 3750?

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please do sho ip int brie

to check all port are ON 

and running

check

connectivity between your 3750 and next device(e.g end-user or other sw L2)

what kind of config you did?

connect 3750 to sw L2 ? use trunk ? or trunk allowed vlan.... or access to specifiv vlan?

or check it to end-user use access ?

[Pawan Raut]

Troubleshooting steps to follow

Check if all vlan status are up /up.

Check user on each vlan have correct default gateway of respective vlan.

Check user are able to ping their default-gateway.