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Philip_W2
Participant
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SMB 770 default route not via WAN interface

Hi,

I'm having trouble setting the default gateway behind another interface but the WAN on my SMB.

Background

For our customer's SMB 770 installation I need to use the following interface config:

WAN: DHCP IP

LAN1: fixed IP + by default traffic needs to be routed this way

LAN2: fixed IP

I configured the following:

1) Internet1 = DHCP, but without "route traffic through this interface by default"

2) LAN2: no issue there, it's just a LAN interface with a connected network

And tried adding the default gateway via LAN1:

1) Configured LAN1 IP in the WebUI (but I'd need to add the default route, which does not accept 0.0.0.0/0).

2) Next I tried adding interface IP and GW via CLI:

set interface LAN1 ipv4-address x.x.x.x mask-length 24 default-gw x.x.x.y

Should be simple, but this returns the error "Failed to find the requested interface"

 

What am I missing here?

Grtz

Philip

1 Solution

Accepted Solutions
Maarten_Sjouw
Champion
Champion

Had similar issue, no Internet connection configured at all.

This is how you solve this issue, let say the nexthop is 10.10.1.15, you just create 2 routes:

add static-route destination 0.0.0.0/1 nexthop gateway ipv4-address 10.10.1.15
add static-route destination 128.0.0.0/1 nexthop gateway ipv4-address 10.10.1.15

Effectively this is 2 half default routes adding up to a default route.

The error about the Interface could be related to the LAN1_Switch, to remove use the following:

delete switch LAN1_Switch
set dhcp server interface LAN1 disable
set interface LAN1 unassigned
set interface LAN1 ipv4-address 10.10.1.1 mask-length 29 state on

Regards, Maarten

View solution in original post

8 Replies
PhoneBoy
Admin
Admin

The LAN interface cannot be used as the default route on SMB appliances.

Philip_W2
Participant

Hi Dameon,

Thanks for your answer.

I filled out a Request for Enhancement for this.

Grtz

Philip

Maarten_Sjouw
Champion
Champion

Had similar issue, no Internet connection configured at all.

This is how you solve this issue, let say the nexthop is 10.10.1.15, you just create 2 routes:

add static-route destination 0.0.0.0/1 nexthop gateway ipv4-address 10.10.1.15
add static-route destination 128.0.0.0/1 nexthop gateway ipv4-address 10.10.1.15

Effectively this is 2 half default routes adding up to a default route.

The error about the Interface could be related to the LAN1_Switch, to remove use the following:

delete switch LAN1_Switch
set dhcp server interface LAN1 disable
set interface LAN1 unassigned
set interface LAN1 ipv4-address 10.10.1.1 mask-length 29 state on

Regards, Maarten
Philip_W2
Participant

Thx Maarten, I'll definitely try that when the issue comes along again!

0 Kudos
Constantin_Pop
Contributor
Thanks Maarten for the hint, that's ingenious and worked great.

Had this issue with the 1430 appliances...if you're not using the WAN interface you can't setup a default route.
Even if you did enter it manually as 0.0.0.0/8, it would come up as dynamic and would not be used.

IMHO setting a default route shouldn't need such artifacts though.
0 Kudos
Maarten_Sjouw
Champion
Champion
It's just to bad, but even in R80.20 on the 15x0 it is still not possible to create a Default route on a LAN port.
Regards, Maarten
0 Kudos
Constantin_Pop
Contributor
That's nice for such a basic feature.
I tried finding this limitation in the docs but doesn't show up anywhere.
0 Kudos
Jose_Garza
Employee
Employee

If you plan to follow these steps, do not use the "state on" at the end of the command:

 

set interface LAN1 ipv4-address 10.10.1.1 mask-length 29 state on

 

Using state on will result in the firewall not setting the IP. (1800 SMB r81.x.x)

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