Ping between VLANs only works one-way, except for Gateway

[jseley002]

Hi all,

I am currently experiencing an issue with communication between VLANs with devices connected to the same L3 switch. 

VLANs are configured as follows: 

Vlan 5  

Interface VLAN 5 

IP Address 192.168.5.1 255.255.255.0 

Vlan 6 

Interface VLAN 6 

IP Address 192.168.6.1 255.255.255.0 

Vlan 8 

Interface VLAN 8 

IP Address 192.168.8.1 255.255.255.0 

Routing is configured as:  

Router eigrp 10  

network 192.168.0.0 255.255.0.0 (no auto-summary and network 192.168.5.0 255.255.255.0, 192.168.6.0 255.255.255.0, and 192.168.8.0 255.255.255.0) 

IP Routing is enabled

VLAN 8/192.168.8.x subnet can ping all IPs on VLAN 5, 6 & 8 

VLAN 6/192.168.6.x subnet can ping all IPs on VLAN 5 & 6, but only the gateway IP on VLAN 8 (not any other IPs, e.g. the device configured with IP address 192.168.8.2 and /24 mask. 

Source pings on the switch from 192.168.6.1 or the PC connected on 192.168.6.2 can ping 192.168.5.1, 192.168.5.2, and 192.168.8.1, but not 192.168.8.2. Pings sourced from 192.168.8.1 or 192.168.8.2 can ping 192.168.5.1, 192.168.5.2, 192.168.6.1 and 192.168.6.2.

What's preventing pings from working in one direction between VLANs???

[mohammed chalil]

Hi,

Try swapping the 8.0 hosts to other vlans. if you are still not able to ping to these hosts then it might be an issue with the firewall policies on the host.

Rgds 

[jseley002]

The only VLANs that work correctly are 5 and 6, any others don't work. I can ping the device on VLAN 8 from the switch from the gateway ip address configured on VLAN 8, but when pinging it from the gateway IP for VLANs 5 or 6 it doesn't complete (so I don't think it's a firewall issue on the host).

Thanks!

[jseley002]

To further clarify, I can also ping the VLAN 8 gateway IP from the VLAN 5 and VLAN 6 gateway IP's as well.

[Masoud Pourshabanian]

Hello,

Do you have any access-list on interface VLANs?

[jseley002]

No access-list is configured

[Masoud Pourshabanian]

Make sure subnet masks are configured correctly on all hosts. Subnet mask must be /24 on all hosts. And as I understood from your posts, default gateway is set on all hosts in VLAN 8.

Masoud

[jseley002]

Thanks, all hosts are configured /24 subnets with the correct gateways.