Meraki MS 250 : Inter-Vlan Routing issue

[Pavan_Pawar]

Hello Experts,

I have created two L3 VLANs and each VLAN has one test PC connected, PC1 is not able to reach PC2.

below is the setup:

{

"interfaceId": "3705899543372500746",

"name": "NAME_VLAN_101",

"subnet": "192.168.101.0/24",

"interfaceIp": "192.168.101.1",

"multicastRouting": "disabled",

"vlanId": 101,

"defaultGateway": "192.168.101.254",

"ospfSettings": {

"area": "ospfDisabled"

}

},

{

"interfaceId": "3705899543372500747",

"name": "NAME_VLAN_201",

"subnet": "192.168.201.0/24",

"interfaceIp": "192.168.201.1",

"multicastRouting": "disabled",

"vlanId": 201,

"ospfSettings": {

"area": "ospfDisabled"

}

}

]

"portId": "1",

"name": "FIXIA-P5-37",

"tags": [],

"enabled": true,

"poeEnabled": true,

"type": "access",

"vlan": 101,

"portId": "3",

"name": "FIXIA-P5-39",

"tags": [],

"enabled": true,

"poeEnabled": true,

"type": "access",

"vlan": 201,

routing table : 

[

{

"staticRouteId": "3705899543372501715",

"name": "Default route",

"subnet": "0.0.0.0/0",

"nextHopIp": "192.168.101.254",

"advertiseViaOspfEnabled": false,

"preferOverOspfRoutesEnabled": false

}

]

Source -

PC1(VLAN101) - 192.168.101.10
Destination -

PC2(VLAN201) - 192.168.201.10

PC1 cannot ping PC2, In captures(taken on the dashboard for the switch) I can see the switch is sending an ARP request and receiving an ARP reply from PC2 but the ping fails. 

On the dashboard, the switch ARP table keeps loading and does not show anything.

Note - The default gateway is not reachable as this is local switch routing.

Do I need to toggle any settings for inter-vlan routing?

Regards,

Pavan

[alemabrahao]

Are they Windows machines? Have you tried disabling the Windows firewall?

[Pavan_Pawar]

this are the Linux machine and nothing sort of blocking on this machines

[alemabrahao]

Maybe the Iptables? Just make sure that nothing is being blocked. As they are directly connected networks, routing should be ok.

[RaphaelL]

Note - The default gateway is not reachable as this is local switch routing.

Do I need to toggle any settings for inter-vlan routing?

What ?

[Pavan_Pawar]

Do I need to make any setting changes to enable inter-vlan routing?

[alemabrahao]

No.

Do you have any ACL configured?

[RaphaelL]

Can PC1 ping his gateway ? 

Can PC2 ping his gateway ?

[Pavan_Pawar]

yes

[RaphaelL]

When doing ifconfig on both PC1 and PC2 , it shows the IP , mask and default gateway ?

[cmr]

If you put both ports in vlan 101 and change the second PC to IP 192.168.101.11 can they ping each other?

If so put both PCs on VLAN 201 and 102.168.201.x IP addresses and try the same, does that also work?

[GIdenJoe]

I noticed the default route for your interface is ALSO on VLAN 101 192.168.101.254.  Are your endpoints using 192.168.101.1 or .254 as their default gateway?

It is bad practice to use the same subnet for clients as for routing on your switch to the next hop towards the internet because this causes asymmetric routing and possible issues with DHCP relay.

[Pavan_Pawar · Accepted solution]

The issue is resolved with the below config change :

"portId": "1",

"name": "FIXIA-P5-37",

"tags": [],

"enabled": true,

"poeEnabled": true,

"type": "trunk",

"vlan": 101,

"allowed vlans" 101

"portId": "3",

"name": "FIXIA-P5-39",

"tags": [],

"enabled": true,

"poeEnabled": true,

"type": "trunk",

"vlan": 201,

"allowed vlans" 201

[JRichardson]

What tool is being used to make these configuration changes? It looks like traditional Cisco CLI albeit different syntax, etc. I am having a similar issue in my environment but only configure through the GUI. Any advice is appreciated. 

[Pavan_Pawar]

the output you see is taken from the API response in the Postman application.