Establishing Device High-Availability State Sharing
Access
Supported Domains
Supported Devices
Classic License
Smart License
Admin/Network
Admin
Leaf only
7000 & 8000 Series
Control
N/A
Device high-availability state sharing allows 7000 or 8000 Series devices or stacks in high-availability pairs
to synchronize as much state as necessary, so that if either device or stack fails, the other peer can take over
with no interruption to traffic flow.
Modifying a high-availability state sharing option on a 7000 or 8000 Series device restarts the Snort process
on the primary and secondary devices, temporarily interrupting traffic insepection on both devices. Whether
traffic drops during this interruption or passes without further inspection depends on how the target device
handles traffic. See
Snort
®
Restart Traffic Behavior
for more information.
Caution
Procedure
Step 1
Configure HA link interfaces for each device in the device high-availability pair; see
Configuring HA Link
Interfaces
.
Step 2
Choose
Devices
>
Device Management
.
Step 3
Next to the device high-availability pair you want to edit, click the edit icon (
).
In a multidomain deployment, if you are not in a leaf domain, the system prompts you to switch.
Step 4
In the
State Sharing
section, click the edit icon (
).
Step 5
Decrease the state sharing values to improve paired peer readiness, or increase the values to allow better
performance.
Cisco recommends that you use the default values, unless your deployment presents a good reason
to change them.
Note
Step 6
Click
OK
to save your changes.
What to do next
• Deploy configuration changes; see
Deploy Configuration Changes
.
Related Topics
Configuring HA Link Interfaces
Snort
®
Restart Scenarios
7000 and 8000 Series Device High Availability
13
7000 and 8000 Series Device High Availability
Establishing Device High-Availability State Sharing
