topic Re: VDX6740(NOS-7.3.0aa)- Inter-vlan routing not working. in Data Center (VDX)

VDX6740(NOS-7.3.0aa)- Inter-vlan routing not working.

pawarpavan — Tue, 06 Jun 2023 13:30:17 GMT

Dear Team,

I have created two VLANs and they are not able to communicate with each other.

interface vlan 101

name TEST_VLAN_101

exit

interface vlan 201

name TEST_VLAN_201

exit

rbridge-id 1

interface ve 101

ip address 192.168.101.1/24

no shutdown

exit

interface ve 201

ip address 192.168.201.1/24

no shutdown

exit

interface Te 1/0/1

switchport

switchport mode access

switchport access vlan 101

exit

interface Te1/0/2

switchport

switchport mode access

switchport access vlan 201

exit

Server A connected on Te 1/0/1

Server B connected on Te 1/0/2

Server A and B are not able to communicate, Do we need to enable "IP routing" as we do it in Cisco switches here? or is there any feature I need to turn on?

Please support.

Re: VDX6740(NOS-7.3.0aa)- Inter-vlan routing not working.

Michael_Morey — Wed, 07 Jun 2023 13:28:41 GMT

Pawarpavan,

Thank you for your question. While the VCS fabric has a "global" view on the L2 VLANs, meaning any VLAN configured is available on each switch in the fabric, this is not true for L3 configurations. At the network layer, you will need to configure the devices as you would any normal stand alone device.

The easiest approach is to configure a VE for each VLAN on each device along with OSPF. Routes will be distributed among the switches and routing will be successful between the VLANS. You could also consider using VRRP-E in this situation as well to have a single VIP.

I set up a simple example in my lab and was able to route traffic using the configuration:

interface vlan 100 interface vlan 200 rb 3 router ospf area 0 interface Ve 100 ip ospf area 0 ip proxy-arp ip address 10.10.10.1/24 no shutdown interface Ve 200 ip ospf area 0 ip proxy-arp ip address 20.20.20.1/24 no shutdown rb 4 router ospf area 0 interface Ve 100 ip ospf area 0 ip proxy-arp ip address 10.10.10.2/24 no shutdown interface Ve 200 ip ospf area 0 ip proxy-arp ip address 20.20.20.2/24 no shutdown

Re: VDX6740(NOS-7.3.0aa)- Inter-vlan routing not working.

pawarpavan — Sat, 10 Jun 2023 07:15:21 GMT

Thanks for the support, It worked for me, there was an issue with my server A. I did not have to make any OSPF-related changes.

So basically VDX by default support Inter-VLAN routing.

Appreciate your time 🙂

Re: VDX6740(NOS-7.3.0aa)- Inter-vlan routing not working.

hbarker — Mon, 30 Jun 2025 20:42:04 GMT

Do you still have the 7.3.0aa code? I need it for our FIPS 140 compliance and can't get it directly from Extreme.