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New Member

Internet doen't work on ASA 5510 for my backup ISP

Hey Guys, I'm sure you can help me. I have a ASA 5510. I setup basic configuration to test internet with 2 ISPs. My first line works with out any problem. But my second line doesn't work. Even when i wipe the configuration, and setup only my second isp. Internet doesn't work. Can you tell me if there is anything wrong with this config?


CaaaA01#  sh run

: Saved


ASA Version 8.3(1)


hostname CaaaA01


enable password 5482d1fd45sdf.dfs encrypted

passwd fsdfdfsdf554sf.sdfd5 encrypted



interface Ethernet0/0

nameif outside

security-level 0

ip address Pub.lic.IP.252


interface Ethernet0/1

nameif backup

security-level 0

ip address Pub.lic.IP.25


interface Ethernet0/2

nameif inside

security-level 100

ip address


interface Ethernet0/3


no nameif

no security-level

no ip address


interface Management0/0

nameif management

security-level 100

ip address



ftp mode passive

clock timezone EST -2

clock summer-time EDT recurring

dns domain-lookup outside

dns domain-lookup backup

dns domain-lookup inside

dns domain-lookup management

dns server-group DefaultDNS




object network obj_any


pager lines 24

logging enable

logging asdm informational

mtu outside 1500

mtu backup 1500

mtu inside 1500

mtu management 1500

icmp unreachable rate-limit 1 burst-size 1

asdm image disk0:/asdm-631.bin

no asdm history enable

arp timeout 14400

nat (inside,backup) source dynamic obj_any interface


object network obj_any

nat (inside,outside) dynamic interface

route outside Pub.lic.GW.249 1 track 1

route backup Pub.lic.GW.26 254

timeout xlate 3:00:00

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

dynamic-access-policy-record DfltAccessPolicy

aaa authentication ssh console LOCAL

http server enable

http management

http inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

sla monitor 125

type echo protocol ipIcmpEcho ISP.GW.Track.45 interface outside

num-packets 3

sla monitor schedule 125 life forever start-time now

crypto ipsec security-association lifetime seconds 28800

crypto ipsec security-association lifetime kilobytes 4608000


track 1 rtr 125 reachability

telnet timeout 5

ssh outside

ssh timeout 5

console timeout 0

dhcpd address inside

dhcpd enable inside


dhcpd address management

dhcpd enable management


threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept


username admin password l/nfADh1Ruu4zqUz 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

  inspect icmp


service-policy global_policy global

prompt hostname context


: end


New Member

Internet doen't work on ASA 5510 for my backup ISP


The configuration seems fine to me .

I think there is a problem with the second ISP provider.

Try to ping its default gateway. If that works fine make the route to the secondary ISP with a lower administartive distance i.e.

no route outside Pub.lic.GW.249 1 track 1

route backup Pub.lic.GW.26 254

Now ping to see if the secondary ISP is even working in your case.

To check whether the config is working fine you can use packet-tracer command--

packet-t input inside tcp 10234 80 det


Internet doen't work on ASA 5510 for my backup ISP

Hello Gady,

We will need to check first if the second line is working, try to ping the default gateway of the backup line.

If that does not work, well there is why SLA is not working.

If further assistance is need it we can run some debugs for the SLA process.



Julio Carvajal
Senior Network Security and Core Specialist
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