I was wondering if someone can give me a hand with troubleshooting an issue I have on my Cisco SG300-10 switch.
Cisco SG300-10 switch in L3 mode
WatchGuard Firewall with x1 interface on 10.0.1.1 DHCP is turned off on WatchGuard trusted interface
VLAN 1 - Management 192.168.1.254
VLAN10 - Guest 192.168.10.254
VLAN 20 - Home 192.168.20.254
VLAN 30 - Testing purposes 192.168.30.254
Assigned to Ports
GE1 - 1,10,20 & 30
GE2 - VLAN 1
GE3 - VLAN 10
GE4 - VLAN 20
GE5 - VLAN 30
GE8 - VLAN 10,20 & 30
GE1 - Trunk - interface IP 10.0.1.2
GE2 - Trunk
GE3 - Access
GE4 - Access
GE5 - Access
GE8 - Trunk
Other ports are access or trunk, no VLAN's assigned to them.
The switch has x3 DHCP pools created these are for VLAN's
Address Pool Start
Address Pool End
Number of Leased Addresses
1d 0h 0m
Port 1 on the switch is setup as an interface with IP address of 10.0.1.2 and is connected to interface 1 on the WatchGuard 10.0.1.1 both have been configured with the same subnet mask
I have created a route of 0.0.0.0 0.0.0.0 to 10.0.1.1 (Watchguard IP)
Other routes created by default on Cisco
IPv4 Static Routing Table
Destination IP Prefix
Next Hop Router IP Address
The Problem I have
When I have clients connected to the switch without the Watchguard connected, they receive an IP address from the pools I created on the switch.
After I connect the WatchGuard to GE1 on the Cisco, the clients still retain their IP address but when connecting new ones they don't receive an address, they get an apipa ip address 169.x.x.x
I hope to hear from someone soon.
(getting a local address 169.x simply means that there was no response from the DHCP server)
- But if the Watchguard starts receiving all traffic you may need to use dhcp relays in your configuration ; check this thread :
if 10.0.1.1 is the IP address of the Watchguard, what is the corresponding L3 interface (and IP address) on the SG300 ?
the interface ace on the Cisco for the watchguard is interface GE1 and the IP address is 10.0.1.2
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