SG350 intervlan routing issue

[Xan]

Hi all together,

I have problem with Inter   routing on SG350.

The configuration is :

Default vlan1 : 192.168.1.3

Network: 192.168.1.0/24

Default gateway:  192.168.1.1

VLAN2: 10.0.15.1/24

VLAN3: 10.0.20.1/24

VLAN5: 192.168.2.1/24

I can't see hosts in vlan1 (default) from any network, but the hosts in vlans2, 3 and 5 can see each other without problems.

Also hosts in vlan's2 , 3 and 5 can't see the default g (192.168.1.1) , they only can ping 192.168.1.3 and no more.

IPv4 Routing is enabled on the switch.

Any ideas?

Thanks in advance,

[Seb Rupik · Accepted solution]

Hi there,

Your problem is two-fold. For devices in VLAN1 their DGW is 192.168.1.1, so traffic sourced from the other VLANs is sent to the wrong gateway.

The VLAN1 hosts require routes for the VLANs 2,3,5 to go via the SG350 SVI (192.168.1.3).

Likewise the DGW for VLAN1 also needs the same set of routes configured:

!
ip route 10.0.15.0 255.255.255.0 192.168.1.3
ip route 10.0.20.0 255.255.255.0 192.168.1.3
ip route 192.168.2.0 255.255.255.0 192.168.1.3
!

cheers,

Seb.

[Xan]

Hi Seb Rupik,

Thank you for your answer, much appreciated!

I'm getting error in this case :

sg350(config)#ip route 192.168.2.0 255.255.255.0 192.168.1.3
Gateway cannot be one of the addresses configured on this device.

The problem is with 192.168.1.3

Many thanks,

Xan

[antonioxud80]

the gateway should be 192.168.1.1

[Xan]

you mean on the switch?

[Seb Rupik]

Hello again,

Those routes need to be configured on the device which has the SVI 192.168.1.1 (the VLAN default gateway).

cheers,

Seb.

[Xan]

Hi Seb,

I will check and I will post result here.

Cheers,

Xan

[Xan]

Hi again,

I added route on the Mikrotik for the

10.0.15.0 /24

 and now I can access the router (192.168.1.1) and behind  (the internet) from 10.0.15.0/24 hosts

also from the  192.168.1.0/24  I can see  everything in 10.0.15.0/24 

The only "issue" is  that  I can't   ping anything in 192.168.1.0/24( except 192.168.1.1) from 10.0.15.0/24.

This is just for debugging

[Xan]

I created dhcp pool on mikrotik  and get address for my test client - and now- inter vlan routing between default vlan(192...) and others are working.

mikrotik vlan 2 addr 10.0.15.1/24

ip dhcp server pool :10.0.15.100 -10.0.15.130

cisco vlan 2 int. addr : 10.0.15.2/24 

test client ip addr. 10.0.15.100 ( from dhcp pool)

Everything is working in both directions. 

Thank you all!