Default route on VLAN

[Paolo_Trivisonn]

Hi,
I have an problem with my core switch, the core is 2 Summit 670 with EXOS 16.1.3.6 .
On the core and peripheral we have many VLAN but when I try to configure an client with the sumimt's IP as default gw I'm able only to ping other VLAN client.. but the default iproute for 0.0.0.0 don't work.
Intervlan forwarding is enabled.
an example config:
configure vlan Client ipaddress 172.26.15.254 255.255.248.0
enable ipforwarding vlan Client
configure vlan AP ipaddress 192.168.110.10 255.255.255.0
enable ipforwarding vlan AP
configure vlan didattical ipaddress 172.26.20.254 255.255.255.0
configure iproute add default 172.26.15.253

Can anyone help me? please...!

[Paolo_Trivisonn]

Look this:

* Slot-1 Summit670.16 # configure iproute add 8.8.8.8/32 172.26.71.254 vlan "Radio"

* Slot-1 Summit670.17 # ping 8.8.8.8 from 172.26.71.253

Ping(ICMP) 8.8.8.8: 4 packets, 8 data bytes, interval 1 second(s).

16 bytes from 8.8.8.8: icmp_seq=0 ttl=118 time=20 ms

16 bytes from 8.8.8.8: icmp_seq=1 ttl=118 time=20 ms

16 bytes from 8.8.8.8: icmp_seq=2 ttl=118 time=20 ms

16 bytes from 8.8.8.8: icmp_seq=3 ttl=118 time=20 ms



--- 8.8.8.8 ping statistics ---

4 packets transmitted, 4 packets received, 0% loss

round-trip min/avg/max = 20/20/20 ms

* Slot-1 Summit670.18 # configure iproute delete 8.8.8.8/32 172.26.71.254 vlan "Radio"

* Slot-1 Summit670.19 # configure iproute add default 172.26.71.254 vlan "Radio"

* Slot-1 Summit670.20 # ping 8.8.8.8 from 172.26.71.253

Ping(ICMP) 8.8.8.8: 4 packets, 8 data bytes, interval 1 second(s).



--- 8.8.8.8 ping statistics ---

4 packets transmitted, 0 packets received, 100% loss

round-trip min/avg/max = 0/0/0 ms

* Slot-1 Summit670.21 #

I don't understand why only the default route don't work from other vlan..

[Ronald_Dvorak]

Run the following from the 670...

sh iproute
ping 8.8.8.8
ping 8.8.8.8 from 192.168.110.10

...and this on the fortigate...
show router static

...and post a screenshot of it.

[Paolo_Trivisonn]

This is my network..

Centro Stella is the core (2 x summit670) with ip 172.26.15.254
on the VLAN client (VID 1).
On the same VLAN I have an Fortigate (172.26.15.253)
as default gw for the core and all client use the core as gw.

[Patrick_Voss]

I also don't see ipforwarding enabled for didattical. If this VLAN is acting as your default gateway ipforwarding will be needed.

[Patrick_Voss]

What is 172.26.15.253? Does it have a route back to the Client subnet? My guess is the switch is forwarding the traffic to the default route but it is not making it back. If you could give more information on the IP you are pinging from and the destination IP along with a topology it might help.