Block Traffic under two VLAN's : Unidirectional OR Bidirectional ???

San Jose, California
June 20, 2013 10:08pm CST
Question: I have a Ciso L3 switch with 4 VLANs and WS-C3560X-48P-S Price WS-C3560X-48P-S Price all host computer connected to rest of 8 cisco 2960 switch's: VLAN 1 : 192.168.1.0/24 VLAN 10: 192.168.10.0/24 VLAN 20: 192.168.20.0/24 VLAN 50: 192.168.30.0/24 There are list of my some Questions about Extended ACL serialwise : 1. For Restrict traffic from VLAN 10 to VLAN 20, I am using only one ACL is : Access-list 100 deny ip 192.168.10.0 0.0.0.255 192.168.20.0 0.0.0.255. What will happen in this scenerio if we talk about traffic from VLAN 20 to VLAN 10. Will it communicate or not ??? 2. How to Block the traffic from VLAN 10 to VLAN 20 but allow the traffic from VLAN 20 to VLAN 10 ? Plz tell access list command for this. Question # 2 Depends on Question# 1................... Answer: With your #1 there will be no communication between 20 and 10. Packets from 20 would be able to get to 10 but no response will get back. WS-C3560X-48P-S WS-C3560X-48P-S And with no response there is no communication.
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