Configuring Diffserv For Ha Maintenance Traffic; Monitoring Ip Entities And Ha Switchover Upon Ping Failure - AudioCodes Mediant 4000 SBC User Manual

CHAPTER 32 HA Configuration

Configuring DiffServ for HA Maintenance Traffic

You can configure Differentiated Services (DiffServ) for HA Maintenance traffic which flows
between the active and redundant devices on the HA Maintenance network interface. The default
DiffServ value for this traffic is 46, which should be sufficient in most setups. However, you may
need to increase the DiffServ priority if you are also running non-HA traffic on this network.
Prioritizing HA Maintenance traffic ensures low latency for this critical network traffic.
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To configure DiffServ for HA Maintenance traffic:
1. Load an ini file to the device with the [HAMaintenanceIFDiffServValue] parameter configured
to the required DiffServ value - 0 is the lowest priority (best effort) and 63 is the highest priority.
2. Reset the device with a burn-to-flash for your settings to take effect.
Monitoring IP Entities and HA Switchover upon Ping
Failure
The device's HA Network Monitor feature monitors the connectivity (reachability ) with network
entities (destinations) by pinging them using Internet Control Message Protocol (ICMP) Echo
messages. The feature can be used, for example, to check connectivity with nearby routers (or first
hops) that the device uses to reach other destinations for sending calls.
The HA Network Monitor table lets you configure up to 10 monitored rows, where each row can
include up to 5 destinations to monitor, defined by hostname (or FQDN), or IP address. You can
then configure the device to perform an HA switchover if a user-defined number of monitored rows
whose destinations fail to reply to the device's sent pings (i.e., unreachable destinations) is
reached or exceeded.
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Mediant 4000 SBC | User's Manual