Networking
Configuring the WAN Redundancy
Cisco ISA500 Series Integrated Security Appliance Administrator Guide
112
4
-
MS-CHAPv2:
MS-CHAPv2 provides mutual authentication between
peers by piggybacking a peer challenge on the Response packet and an
authenticator response on the Success packet.
•
Keep Live:
Keeps the connection always on, regardless of the level of
activity. This option is recommended if you pay a flat fee for your Internet
service.
•
Max Idle Time:
Lets the security appliance disconnect from the Internet
after a specified period of inactivity (Idle Time). If you choose this option,
enter the value in minutes in the
Maximum Idle Time
field. This option is
recommended if your ISP fees are based on the time that you spend online.
•
MTU:
The Maximum Transmission Unit (MTU) is the size, in bytes, of the
largest packet that can be passed on. Choose
Auto
to use the default MTU
size, or choose
Manual
if you want to specify another size.
•
MTU Size:
If you choose
Manual
, enter the custom MTU size in bytes.
NOTE
For PPPoE connections, the default MTU size is 1492 bytes. Unless a
change is required by your ISP, it is recommended that the MTU
values be left as is.
STEP 4
Click
OK
to save your settings.
STEP 5
Click
Save
to apply your settings.
Configuring the WAN Redundancy
If you have two ISP links, one for WAN1 and another for WAN2, you can configure
the WAN redundancy to determine how the two ISP links are used.
NOTE
Before you configure the WAN redundancy, you must configure the secondary
WAN connection. See