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What command do I use to assign static IP to ASA interface

Posted on 2011-09-16
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Last Modified: 2012-05-12
My ASA outside interface is getting an address from the DHCP in a TELMEX DSL router.  I need to turn DHCP off.  How do I assign a static IP?  I need to know the commands.  Here is the interface config now with an address from DHCP.

Interface Vlan2 "outside", is up, line protocol is up
  Hardware is EtherSVI
      MAC address 0007.0e46.ad0d, MTU 1500
      IP address 192.168.1.101, subnet mask 255.255.255.0
  Traffic Statistics for "outside":
      16548 packets input, 23143012 bytes
      11208 packets output, 505824 bytes
      38 packets dropped
      1 minute input rate 208 pkts/sec,  293293 bytes/sec
      1 minute output rate 140 pkts/sec,  6077 bytes/sec
      1 minute drop rate, 0 pkts/sec
      5 minute input rate 0 pkts/sec,  0 bytes/sec
      5 minute output rate 0 pkts/sec,  0 bytes/sec
      5 minute drop rate, 0 pkts/sec
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Question by:jtennyson
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Expert Comment

by:Ernie Beek
ID: 36550156
Int vlan2
IP address x.x.x.x 255.255.255.x
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Expert Comment

by:Ernie Beek
ID: 36550177
Don't forget you'll need a default route as well then.

Route outside 0.0.0.0 0.0.0.0 x.x.x.y
The x.x.x.y should be the IP of internet router/modem.
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Expert Comment

by:Randy Downs
ID: 36550207
http://www.cisco.com/en/US/docs/security/pix/pix63/command/reference/gl.html

 To reset the interface and delete the DHCP lease from PIX Firewall, configure a static IP address with the ip address if_name ip_address [netmask] or ip address if_name pppoe | dhcp [setroute] command, or use the clear ip command.

The ip address dhcp and pppoe command options are mutually exclusive.

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Author Comment

by:jtennyson
ID: 36550229
The LAN address correct?
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Author Comment

by:jtennyson
ID: 36550260
Erniebeek - I need to route to the routers inside LAN address correct.  192,168.1.254?
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Expert Comment

by:Ernie Beek
ID: 36550318
No, the pix needs a default gateway. If your provider gave you a static IP, he should have also have given you a gateway address. Did he?
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Author Comment

by:jtennyson
ID: 36550402
The router does not have a static IP on the outside.  The gateway wouldn't be the static IP on the inside of the router?
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Expert Comment

by:Ernie Beek
ID: 36558611
Ehr, but the question was: 'how do I assign a static ip on the outside' was it?

So what we are discussing here is what to do when you are going to assign a static ip on the outside.

When using DHCP (as you are now), a default gateway will be assigned automatically.
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Author Comment

by:jtennyson
ID: 36560137
No.  I want to assign a static IP on the  ASA wich connects to the DSL router.  It is on the inside.  connecting to 192.168.1.254.  I don't want to use DHCP on the router.
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Expert Comment

by:Ernie Beek
ID: 36560262
Ok, getting confused here.

Could you try to describe this a bit more elaborate?
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Author Comment

by:jtennyson
ID: 36560518
I am going to create a (very crude) diagram and upload it.
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Expert Comment

by:Ernie Beek
ID: 36560520
Please do :)
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Author Comment

by:jtennyson
ID: 36560682
Maybe this helps.
Juarez-diagram.pdf
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Accepted Solution

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Ernie Beek earned 500 total points
ID: 36560735
Ah, I think I'm getting it :)

The ASA is on the inside of the router getting a DHCP addres on it's outside interface (from the router.

So you'll need:

Interface vlan2
IP address 192.168.1.x 255.255.255.0

For the x fill in the number you would like it to have.
And:
route outside 0.0.0.0 0.0.0.0 192.168.1.254

That should do the trick.
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Author Comment

by:jtennyson
ID: 36560821
Thanks so much
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Author Closing Comment

by:jtennyson
ID: 36560831
Thanks for the help.  I know I wasn't all that clear at the beginning
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Expert Comment

by:Ernie Beek
ID: 36560848
:)
Well, eventually we got there, didn't we ;)

Thanks for the points.
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