Issues connecting to a router from Draytek L3 SG500-28

Hi all

I really struggle with this one. I have a SG 500-28 L3 switch with a link to trunk work to two other L2 switches. I am trying to allow guests in VIRTUAL LANs for access to the outside world... the L3 switch is connected to a router Draytek. I have assigned an IP address to one of the ports and set routing in both directions of L3 to the router. I can ping from the L3 switch to the router and the router to the L3 switch, but no host in any VLAN only can ping more far than the interface IP Can anyone help with this? Is there something specific in this switch I'm missing? IP routing is enabled on the L3 switch.

The L3 config is here:


v1.2.7.76 / R750_NIK_1_2_584_002

CLI v1.0

SSD of encrypted file indicator



config of SSD

control of password file unrestricted SSD

no control of the integrity of the file ssd

SSD-control-end cb0a3fdb1f3a1af4e4430033719968c0


database of VLAN

VLAN 10,20,30,100


Add a voice vlan Yes-table 0001e3 Siemens_AG_phone___

Add a voice vlan Yes-table 00036 b Cisco_phone___

Add a voice vlan Yes-table 00096e Avaya___

Add a voice vlan Yes-table 000fe2 H3C_Aolynk___

Add a voice vlan Yes-table 0060 b 9 Philips_and_NEC_AG_phone

Add a voice vlan Yes-table 00d01e Pingtel_phone___

VLAN voice Yes-table add Polycom/Veritel_phone___ 00e075

Add a voice vlan Yes-table 00e0bb 3Com_phone___

Hello interface range vlan 1

hostname switch8abb2b

username privilege 15 0c4d0931711a0e9cb22337c1adbe39091ad15a73 encrypted password cisco


interface vlan 1


no ip address dhcp


interface vlan 10




interface vlan 20




interface vlan 30




interface vlan 100

name ITECH



interface gigabitethernet1/1/1

switchport trunk allowed vlan add 10,20,30,100

default switchport vlan tagged


interface gigabitethernet1/1/24



IP route

The draytek routing table is here:

Key: C - connected, S - static, R - RIP, *-default, ~-private

* / via WAN2

S ~ / via LAN1

S ~ via LAN1

S ~ via LAN1

C ~ directly connected to LAN1

C directly connected WAN2

I am also getting this error periodically on the L3 switch. Not sure if it is related to the problem.

switch8abb2b # 19 July 2012 18:37:27 % CDP-W-NATIVE_VLAN_MISMATCH: incompatibility of VLAN native detected on the interface item in gi1/1/1.

Any help would be greatly appreciated!


Hi Chris, the problem seems to be the router. It does not support interface trunk/sup dot1q or it back pointing you are missing the static routes, to the SVI to the switch.

Please mark replied messages useful

Tags: Cisco Support

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