Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1504
  • Last Modified:

Cisco 3560 Switch - Disable Routing Between two VLANs

Need to prevent communication between VLAN 2 and VLAN3.  Both need to be able to route out through VLAN 1.

Current IP route statement is 0.0.0.0 0.0.0.0 10.30.1.1

Network 1: 10.30.1.0/24  (VLAN 1)
Network 2: 10.30.10.0/24  (VLAN 2)
Network 3: 10.30.20.0/24  (VLAN 3)

How do I disable routing between VLAN 2 and VLAN 3?  Please provide commands.



0
ohmErnie
Asked:
ohmErnie
  • 5
  • 4
  • 2
2 Solutions
 
Istvan KalmarCommented:
Hi,

you need:
int vlan 2
 ip access-group 101 in
access-list 101 deny ip 10.20.10.0 0.0.0.255 10.30.20.0 0.0.0.255
access-list 101 permit ip any any
0
 
Istvan KalmarCommented:
sorry this acl need for you:

access-list 101 deny ip 10.30.10.0 0.0.0.255 10.30.20.0 0.0.0.255
access-list 101 permit ip any any
0
 
joelvpCommented:
conf t
ip access-list e DENYVLAN3
deny ip any 10.30.20.0 255.255.255.0
permit ip any any

ip access-list e DENYVLAN2
deny ip any 10.30.10.0 255.255.255.0
permit ip any any

int vlan2
ip access-group DENYVLAN3 in

int vlan3
ip access-group DENYVLAN2 in


0
Configuration Guide and Best Practices

Read the guide to learn how to orchestrate Data ONTAP, create application-consistent backups and enable fast recovery from NetApp storage snapshots. Version 9.5 also contains performance and scalability enhancements to meet the needs of the largest enterprise environments.

 
joelvpCommented:
Sorry, mine is wrong
0
 
joelvpCommented:
this is what it should have been (but ikalmar already gave the right coding):
conf t
ip access-list e DENYVLAN3
deny ip any 10.30.20.0 0.0.0.255
permit ip any any

ip access-list e DENYVLAN2
deny ip any 10.30.10.0 0.0.0.255
permit ip any any

int vlan2
ip access-group DENYVLAN3 in

int vlan3
ip access-group DENYVLAN2 in

0
 
ohmErnieAuthor Commented:
How would I change this to a permit only?  Say I only want the network x.x.x.x to have access to 10.30.20.0/24 and deny everything else.
0
 
Istvan KalmarCommented:
access-list 102 permit ip x.x.x.0 0.0.0.255 10.30.20.0 0.0.0.255
access-list 102 deny ip any any
0
 
joelvpCommented:
the line
access-list 102 deny ip any any
is not needed as it is implicit

and you would need to code also:
int vlan3
ip access-group 102 out
0
 
ohmErnieAuthor Commented:
If I have two 3560g switches connected via a SFP GB Module, do I need to create this list on both switches?
0
 
joelvpCommented:
On which of the switches are the vlan interfaces defined? Or are you using HSRP? In the latter case you would have to do the job on both switches, otherwise the switch on which the interfaces are defined is sufficient.
0
 
Istvan KalmarCommented:
please show booth switches config..

0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

  • 5
  • 4
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now