Routing MX 84 to Cisco 3750 Core

TonyBoy
Comes here often

Routing MX 84 to Cisco 3750 Core

Capture3.PNGWhat's the best practice for the MX IP and VLAN, Lets say that my Cisco Core VLAN 1 is set to 192.168.70.1

How should I set the MX

Name Default

Subnet: 192.168.70.0/24

MX IP: 192.168.70.254 (or Any Available IP)

VLAN ID 1  is ok to use same VLAN 1?

 

 

 

 

 

 

Cisco switch

interface GigabitEthernet1/0/36
 description Uplink to FW
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 1
 switchport trunk allowed vlan 1,2  (I have a second vlan for testing) 
 switchport mode trunk

 

 

 

 

7 REPLIES 7
jcottage
Here to help

Hey TonyBoy,

 

With out knowing more about your topology I personally cant give you a 100% answer however I can tell you that as long and the MX and the 3750 have IP interfaces on the same vlan you will be able to route between them. 

 

Side Note: using vlan 1 is against best practice in Cisco world but not necessarily in the Meraki world

PhilipDAth
Kind of a big deal
Kind of a big deal

Does the 3750 have other layer 3 VLANs configured on it?

Vlan 1  192.168.70.1 Default
Vlan 2 192.168.71.1 Wireless
Vlan 3 192.168.72.1 Cameras
Vlan 4 192.168.73.1 Voice
Vlan 5                       User
Vlan 6                       Production
Vlan 7                       Firewall  (ASA is living here)

Vlan 10                     Servers

 

Cisco Core is using   EIGRP

router eigrp 100
 network 192.168.76.0
 network 192.168.253.0
 network 192.168.254.0
 redistribute connected
 passive-interface Vlan254
 eigrp router-id 192.168.70.1
!
ip default-gateway 192.168.76.254

MRCUR
Kind of a big deal

Is your MX meant to be your 3750's default gateway at 192.168.76.254 or is this another device? 

MRCUR | CMNO #12
TonyBoy
Comes here often

will be the MX, the Core is already configured pointing at the FW

Hey Tony,

 

Is the goal to replace the ASA?

TonyBoy
Comes here often

correct the MX will replace it and set it as the gateway

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