I have a cisco ASA 5515 and a Cisco 3850 switch in our network. I'm a sys admin by trade and know enough to get a switch up and running but the asa thing is confusing me a bit. This hardware was bought by someone who then left the company and so now I'm tasked with setting it up.

Right now we have a /29 say

Our private ip space is

So our asa is online via the management network on

Our 3850 is also online via

I'm having some issues assigning out public ip space to the ASA and then routing vlan traffic to it.

Right now my vlans are attached to the 3850 like

interface Vlan60
 ip address
interface Vlan70
 ip address

Routing on the 3850 looks like

ip route

The is our old datacenter we are moving away from.. Ideally I'd like to route all traffic out via the ASA.

So it's like

internet <--> ASA <--> 3850 <--> internal lans.

Not sure what I'm really missing to tackle this.

ASA Config

asa# show run
: Saved
ASA Version 9.1(1)
hostname asa
interface GigabitEthernet0/0
 nameif outside
 security-level 0
 ip address
interface GigabitEthernet0/1
 nameif inside
 security-level 0
 ip address
interface GigabitEthernet0/2
 no nameif
 no security-level
 no ip address
interface GigabitEthernet0/3
 no nameif
 no security-level
 no ip address
interface GigabitEthernet0/4
 description STATE Failover Interface
interface GigabitEthernet0/5
 description LAN Failover Interface
interface Management0/0
 nameif management
 security-level 100
 ip address
boot system disk0:/asa911-smp-k8.bin
ftp mode passive
clock timezone PST -8
clock summer-time PDT recurring
dns server-group DefaultDNS
 domain-name sjc.recurly.net
access-list global_access extended permit icmp any any
pager lines 24
logging enable
logging monitor debugging
logging buffered debugging
logging trap debugging
logging asdm informational
logging host management
mtu management 1500
mtu outside 1500
mtu inside 1500
ip verify reverse-path interface outside
failover lan unit primary
failover lan interface folink GigabitEthernet0/5
failover key *****
failover link statelink GigabitEthernet0/4
failover interface ip folink standby
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
access-group global_access global
route outside 1
route management 1
route management 1
route management 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
aaa-server radius-group protocol radius
 accounting-mode simultaneous
 merge-dacl before-avpair
aaa-server radius-group (management) host
 key *****
 authentication-port 1812
 accounting-port 1813
user-identity default-domain LOCAL
aaa authentication http console radius-group LOCAL
aaa authentication ssh console radius-group LOCAL
aaa authorization command LOCAL
http server enable
http management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
ssh management
ssh timeout 5
ssh version 2
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server source management
username shon password Vp4yQWvnJ8bKI5Lz encrypted
class-map inspection_default
 match default-inspection-traffic
policy-map type inspect dns preset_dns_map
  message-length maximum client auto
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect rsh
  inspect rtsp
  inspect esmtp
  inspect sqlnet
  inspect skinny
  inspect sunrpc
  inspect xdmcp
  inspect sip
  inspect netbios
  inspect tftp
  inspect ip-options
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
: end
  • 1
    When you say "management" network, do you mean "inside" interface? If not, what is the address of the inside interface of the ASA?
    – Ron Trunk
    Commented Jul 9, 2014 at 17:52
  • right now I have the inside interface which is 0/1 set to
    – Mike
    Commented Jul 9, 2014 at 18:22

1 Answer 1


Enter the following commands on your 3850:

no ip route
ip route

This will direct Internet traffic to your firewall. If you haven't set up NAT on your firewall yet, post a copy of your firewall config and we can modify that for you too.

  • thanks.. i added the ASA config. I also switched with on int 0/1.. The funny thing is on the switch when i do a show arp I don't see IP in the arp table
    – Mike
    Commented Jul 10, 2014 at 3:03
  • ok scratch the arp.. its showing up on my 3850 now I see I just don't see the ip i gave the port-group on the 3850 on the ASA.. but I might have not understood how its all setup
    – Mike
    Commented Jul 10, 2014 at 3:08
  • Send me an email (address is in my profile). There is more to do here than can fit easily in a comment.
    – Ron Trunk
    Commented Jul 10, 2014 at 16:11

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