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Pings only working one way across VLANs (except gateway addresses which always work)

Jbyrne244
Level 1
Level 1

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) 

 

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 not192.168.8.2. 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.

(apologies if this was posted multiple times -- my colleague and I are having having trouble finding his post in the forum after submitting with his guest account)

Thanks!

2 Replies 2

Jbyrne244
Level 1
Level 1

Please help, someone!

Ganesh Hariharan
VIP Alumni
VIP Alumni

Hello,

What switch is this ??

Are these switches are in vPC ??

Do you have any ACL configured in switch ??

-GI