Cisco Firewall :: ASA5520 / 3560 - VLANs And Sub Interfaces

Aug 20, 2012

ASA's G0/2 interface is connected to G0/1 interface of a 3560G switch in DMZ, below is the config and diagram
 
Switch Config
int g0/1
switchport mode trunk
switchport trunk encapsulation dot1q
int vlan 1
ip add 192.168.0.100 255.255.255.0
 
We are running out of IPs in 192.168.0.X network and planning on creating sub interfaces on the ASA and trunk it to the switch so that we can have multiple V LANs in DMZ. Tried the below config in LAB but that didn't work, can you have a look at it and let me know if I miss anything. No change on the switch config since G0/1 is already a trunk port.
 
ASA Config
interface GigabitEthernet0/2
description Trunk to DMZ networks
no nameif dmz
[code]...
 
If I change the V LAN on the switch from 1 to a different V LAN, say V LAN 50 for example, and configure the ASA accordingly its working fine.

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May 12, 2011

I have a pair of brand new 5520s I am in the middle of commission.  After carving out all the DMZs etc I needed I realized that I really neede another physical NIC, not just another VLAN off a configured nic. [code]I am running 8.3(2).  How can I turn these "Not used" interfaces into useable ones?

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May 31, 2012

I'm having a weird issue with an ASA 5520 (Ver. 8.2) of a customer. The scenario is as follows:
 
There is a sub net (on a sub interface) "Guest" which basically is allowed unlimited access to the internet. Traffic is source Na Ted through the ASA to the outside interface. This works fine.
 
There is on the "inside" interface a server which can be accessed from the outside via a public IP address. On the ASA this is implemented as a static NAT entry. This also works fine.
 
Now the customer wants to access the server on the inside from a client of the "Guest" interface using the public (Na Ted) IP address. Reason for this is, they have an application with hard programmed IP address inside and want to run some life tests. However, this kind of traffic seems not to be passing through the ASA.
 
What I have tried so far:
 
- examined, if a hairpin scenario could be applied here, but it seems not, as I have traffic traveling between interfaces not out and in to the same interface.
- enabled the option "enable traffic between two or more interfaces which are configured with same security levels" and also "enable traffic between two or more hosts connected to the same interface"
- when I use the real addresses of the host, it works, so it shouldn't be an issue with the firewall rules
 
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Apr 18, 2013

I have a an ASA 5520 connected to a Layer 3 (3750) switch (Inside) and a connection to a 2960 switch (Outside) to get to the internet. . I have created vlan interfaces on the 3750 switch and enabled ip routing on the switch to enable the vlans to communicate with each other.
 
Vlan Interfaces on the switch:
Vlan 100 172.17.1
Vlan 200 172.18.1
Vlan 300 192.168.3.1 
 
I want the devices connected to the 3 vlans to be able to pass through the firewall and get out to the internet.I have connected the ASA to the 3750 by routed interfaces (10.10.10.1) --------- (10.10.10.2) and they are able to ping each other.I have also put a default route on the 3750 sending all traffic from the switch to the ASA inside interface (10.10.10.1)The issue that i am having is that the ASA also connects to a 2960 which has a connection to the Internet, and they are handing off an ethernet connection from the 2960 that sits in VLAN 55 (Vlan 55 is the Internet accessible vlan).How do I configure my ASA to send all traffic from my (3) vlans to the interfaces that connects to the 2960 switch?

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I am using a Catalyst 7600.
 
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just have  few questions about designing WLC 5508
 
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T2 firewall has a DMZ switch connected which has a router which connects to MPLS cloud to different site across the country. (around 10 sites) all static routing.
 
Now the client is thinking to deploy wireless at all 10 sites using H-REAP. The issue is that client has only one WLC and they are not willing to buy other as i was thinking to deploy two WLC one for corporate and one for guest users. (one in internal network and on in DMZ)
 
Now my question is as follow.
 
1- Keeping in mind that there is only one WLC where should i physically put it?
2- How guest users will work ? How the authentication will be done?
3-There are 8 SFP ports in WLC how physical topology will look like?
4-How many Vlans i have to make for wirless users  will that be 10? (1 at each site) ?
 
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Oct 8, 2012

just have  few questions about designing WLC 5508. The  scenario is  that currently one of the client has a firewall Tie ring T1 internet facing and T2 internal which has multiple DMZ connected. T2 firewall has a DMZ switch connected which has a router which connects to MPLS cloud to different site across the country. (around 10 sites) all static routing. Now the client is thinking to deploy wireless at all 10 sites using H-REAP. The issue is that client has only one WLC and they are not willing to buy other as i was thinking to deploy two WLC one for corporate and one for guest users. (one in internal network and on in DMZ). Now my question is as follow. 

1- Keeping in mind that there is only one WLC where should i physically put it?
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I'm building this network and I stumbled upon a problem that I don't understand. Here is how my config looks:
PC -----------vlan5-------Cisco 3560----trunk3-5----Cisco AP1420
Vmware guest

Configuration of 3560:
interface Vlan3
description ID-180, wifi1
ip address x.x.x.x 255.255.255.224
ip access-group 115 in
[code] .......

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interface FastEthernet0
no ip address
no ip route-cache
[code]....

PC and vm ware are plugged in port 5 and 6, wifi in port 7. There if no V LAN ID set on the PC, but there is V LAN ID set on the VM ware esx interface. If I try to ping WIFI from PC or esx, ping doesn't get through. If I plug WIFI to port 5 or 6, I get access it.

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Sep 29, 2011

I have no router inplace that can do trunking (5505 basic license )I have 2 VLANS 10 Data 20 voice I have given both VALNs IPs lets say

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is it possible with LMS 4.0 and VLAN Port Assignment also to configure auxiliary vlans?
 
1. I selected Configuration > Workflows > VLAN > Configure Port  Assignment.
2. Selected my device (a test switch WS-C3560-8PC-S)
3. Clicked List Ports
 
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Mar 29, 2012

As per my attached diagram, I have three switches (Cat 3560-E and couple of Cat 2960-G)

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PC -1 on vlan 100
PC-2 on vlan 200

I need to connect PC-1 and PC-2 to the server. Server has no fixed vlan and can be changed.

Restrictions:

1) can’t change PCs vlan assignment.
2) can’t add 2nd NIC in the server.
  
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000129: *Feb 28 19:24:58.289 EST: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port FastEthernet0/1 on VLAN0103.000130: *Feb 28 19:24:58.448 EST: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port FastEthernet0/1 on VLAN0103.
 
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!
!
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!
interface GigabitEthernet0/0
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[Code]....

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