04-21-2016 02:32 AM - edited 03-08-2019 05:26 AM
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
04-21-2016 03:34 AM
What faulting have you done to identify this issue?
04-21-2016 04:55 AM
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
04-21-2016 06:23 AM
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.
04-21-2016 07:02 AM
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?
-------------------------------------------------------------------------
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 ?
04-21-2016 11:08 AM
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.
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