NAT timeout for failover w / double ISPS

I have failover configured, tested and verified using IP SLA, based on routing rules and failover NAT mentioned in this guide:

http://docwiki.Cisco.com/wiki/NAT_failover_with_DUAL_ISP_on_a_router_Configuration_Example

The problem is that it takes about 60 seconds for the active nat translation timeout.  Is there a recommended way to shorten this time other than changing the NAT time-out value in the world?

Platform: 2921

IOS: 15.2 (4) M4

Topology:

------------- ISP1 -------------

|                                |

| int Gi0/1 |

LAN - router WAN Internet

| int Gi0/2 |

|                                |

------------- ISP2 -------------

Config:

ALS IP 1

1.1.1.1 - echo ICMP-source 1.1.1.2 ip address

threshold 250

Timeout 900

frequency 3

IP SLA annex 1 point of life to always start-time now

!

ALS IP 2

2.2.2.1 - echo ICMP-source 2.2.2.2 ip address

threshold 250

Timeout 900

frequency 3

IP SLA annex 2 to always start-time life now

!

track 1 accessibility of als 1 ip

!

Track 2 accessibility of ALS 2 ip

!

IP access-list extended by default-traffic-ACB

deny ip 192.168.0.0 0.0.255.255 192.168.0.0 0.0.255.255

IP 192.168.0.0 allow 0.0.255.255 everything

!

Media-Lab-ACB extended IP access list

deny ip 192.168.19.0 0.0.0.255 192.168.0.0 0.0.255.255

IP 192.168.19.0 allow 0.0.0.255 any

!

by default-traffic-PBR permit 10 route map

the IP by default-traffic-ACB-matches

set ip 2.2.2.1 jump following 10 track 2

set ip 1.1.1.1 jump following 20 track 1

!

Media-Lab-ACB route map permit 10

the IP Media-Lab-ACB-matches

set ip 1.1.1.1 jump following 10 Track1

set ip 2.2.2.1 next 20 track 2 break

!

strategy local IP map route by default-traffic-ACB

!

interface GigabitEthernet0/0,16

property policy intellectual map of route by default-traffic-ACB

!

interface GigabitEthernet0/0.19

intellectual property policy map route Media-Lab-ACB

!

! NAT CONFIGURATION

!

NAT_ACL extended IP access list

deny ip 192.168.0.0 0.0.255.255 192.168.0.0 0.0.255.255

IP 192.168.0.0 allow 0.0.255.255 everything

!

ISP1_NAT allowed 10 route map

corresponds to the IP NAT_ACL

is the interface GigabitEthernet0/1

!

ISP2_NAT allowed 10 route map

corresponds to the IP NAT_ACL

is the interface GigabitEthernet0/2

!

IP nat inside source map route ISP1_NAT interface GigabitEthernet0/1 overload

!

IP nat inside source map route ISP2_NAT interface GigabitEthernet0/2 overload

!

end

Hello

You can use the EEM script to help in your case.

!

NAT-TRACK event manager applet

model event syslog 'FOLLOW-UP-5-STATE '.

order cli action 0.1 'enable '.

action 0.2 wait 3

action 0.3 cli command "clear ip nat translations."

action 0.4 syslog msg "Translation NAT cleared after state change of track"

!

I hope that helps...!

Tags: Cisco Network

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    Here is the configuration, we have 4 subnets that we need to keep separate. I have each of the ASAs connected to different subnets. However, only 1 subnet's IP address configured standby while all other subnets have only an active address on the active firewall. As this is a failover scenario, I have 2 interfaces for LAN and stateful failover.

    I just test the failover on 2 subnets without any standby ip address and to my surprise, everything seems to work as expected. Just need for clarification on why we need sleep on the monitored interfaces addresses when clearly the installer can work without any configured. Are there implications with instance without standby ip addresses?

    Thank you

    Especially at your facility can happen many things cannot be recognized by the ASA without a correct installation of failover. This could be a port of mafunctioning in your infrastructure for example.

    But leave approach it the other way around: what advantages do you see in the implementation in a non-standard way? Or what kind of problems do you expect? Usually the night before IP is not configured if there is no IP address for example on the outside interface.

    --
    Don't stop once you have upgraded your network! Improve the world by lending money to low-income workers:
    http://www.Kiva.org/invitedBy/karsteni

  • Connection problem SSL QuickVPN for RV042 only through ISP specific

    Hello

    I noticed a frequent problem using QuickVPN to connect via a RV042.  With an access provider specific (Rogers cable) occasionally for a particular location internet to the Canada QuickVPN stop to be able to connect in my work VPN (although a RV042), even if it had been fine connection before (and can often connect through the same ISP somewhere else).  Although the RV042 is reached and a TCP connection is formed, the SSL connection fails and the problem persists indefinitely.  If I connect to the computer (a laptop Windows Vista) to another ISP, I am able to connect properly.  Restart the cable modem/router do not solve the problem.  I saw once a occurring in similar problem with another ISP (DSP from Bell internet to the Canada), but in this case restart the modem/router DSL has solved the problem.

    I suspect that the edge router in the ISP meets certain problems related to the delivery of SSL connection.

    If anyone has experienced this problem or knows a resolution?

    Thank you
    Mark

    The only configuration for PPTP is to activate the feature, specify the subnet, the router assigns to the logged-in user, then make a PPTP user. It is about as fast as QVPN and uses the built-in MS client.

    -Tom
    Please evaluate the useful messages

  • Configuration of a timeout for an IPSEC tunnel

    With a VPN connection from site to site between two Cisco 837 s, is it possible that I can set up the IPSEC tunnel to be razed after a period of inactivity and, then, the tunnel is built again when more traffic is passed?

    Hi mitchen

    A sense (but probably not what you're looking for), to "timeout" the IPSEC Session is to use the SA IPSEC-life expectancy.

    If the connection is still required (crypto acl are triggered) the connection will be restored, otherwise it will be demolished.

    HIS life is without delay of inactivity but it is used to "re-authenticate/restore / offer more security" for the IPSEC tunnel on a regular basis.

    With a "Newer" IOS, there is a feature called:

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    This can be created or specified by peers worldwide.

    You will find all the details here:

    http://www.Cisco.com/en/us/partner/products/SW/iosswrel/ps1839/products_feature_guide09186a00801541d4.html#wp1027129

    "Remember messages useful rate."

    Greetings

    Jarle

    Greetings

    Jarle

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