Switches / Hubs
Switches / Hubs

3COM VLAN

Does created VLANs route by itself by default ? I have created few VLANs and it can communicate within each VLAN. Any idea ?

Tks
Configuration.txt

AXISHKAsked: 2015-09-15

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LVL 4

Anthony CarterCommented: 2015-09-15

If it is anything like HP Procurve, all VLANs can talk to all VLANs by default. You need to configure acls in the Layer3 switch to stop the hopping between VLANs.

The Layer3 switch automatically has a route map. If it knows about all 3 VLAN's, it knows how to route them. Apply ACLs to prevent traffic between them.

Have a look at: http://www.h3c.com/portal/Technical_Support___Documents/Technical_Documents/WLAN/Access_Controller/H3C_WX3000_Series_Unified_Switches/Configuration/Operation_Manual/H3C_WX3000_CG-6W103/201007/685290_1285_0.htm

specifically, Assigning an ACL to a VLAN.

LVL 4

Anthony CarterCommented: 2015-09-15

This is a quick example I found googling:

acl number 3011
description Inbound vlan 11 traffic
rule deny ip source 10.0.11.0 255.255.255.0 destination 10.0.13.0 255.255.255.0
rule permit ip source any
quit

now go into vlan interface 11 and apply the acl

int vlan 11
packet-filter 3011 inbound
quit

You can find more here (message 10 has the full example): http://h30499.www3.hp.com/t5/Comware-Based/Can-we-restrict-routing-between-VLANs-in-A5120-using-ACL/td-p/5398109#.Vfjcc_lVhBc

LVL 1

Budhi WitonoCommented: 2015-09-15

on vlan-interface1
rule 10 deny ip source 10.0.23.253 destination 10.0.22.253
rule 20 deny ip source 10.0.23.253 destination 10.0.21.253
rule 30 deny ip source 10.0.23.253 destination 10.0.20.253

on vlan-interface10
rule 10 deny ip source 10.0.22.253 destination 10.0.23.253
rule 20 deny ip source 10.0.22.253 destination 10.0.21.253
rule 30 deny ip source 10.0.22.253 destination 10.0.20.253

so on interface 100, 200

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