AudioCodes Mediant 3000 User Manual

Version 7.0 659 Mediant 3000
User's Manual 38. Network Interfaces and Mediant 3000 High Availability
38 Network Interfaces and Mediant 3000 High
Availability
In High Availability (HA) mode, the device features two blades which are redundant to each
other. Both blades share the same configuration, while only one of them is active. (The
default state is the Active module in Slot 1 and the Redundant module in Slot 3).
Each blade in the Mediant 3000 system boots as standalone. The blade is also assigned
its own private address (which may have been acquired via BootP/DHCP or configured
manually) which is used for maintenance only (prior to entering HA mode).
The active blade uses the address configured by the Interface table. The redundant blade
disconnects from the network once the device enters HA mode.
When the system loads from BootP/TFTP (first configuration setup), HA is disabled. After
resetting the Active blade through the Web interface, it loads from flash and HA becomes
activated.
38.1 Mediant 3000 Internal Link
The device's two blades keep an active communication channel between them. Through
this channel, the redundant blade is constantly updated by the active blade and monitors
the state of the active blade, ready to take over in the case of a failure. This internal link is
used solely for internal communication and is un-reachable from an external network.
The device uses pre-configured IP addresses based on the chassis slot in which each
resides:
Table 38-1: Blades' Default Internal Private IP Addresses
Blade IP Address Subnet
Active (Slot 1)
11.3.9.1 255.255.255.252 (prefix length of 30 bits)
Redundant (Slot 3)
11.3.9.2 255.255.255.252 prefix length of 30 bits)
Warning: The internal link addresses must not be configured as one of the device's
IP addresses. Communication with any external peer carrying this address is also
forbidden.
38.2 Example of Multiple Interface Configuration
The following example shows a configuration of multiple network interfaces, including IPv6
and VLANs.
1. The Interface table is configured with three IP network interfaces, one for each
application type:
• OAMP
• Call Control
• RTP Media
Table 38-2: Example of VLANS and Multiple IPs for Mediant 3000 HA
IP Address Description
Device's Global IP Addresses

AudioCodes Mediant 3000 Specifications

General

Brand	AudioCodes
Model	Mediant 3000
Category	Gateway
Language	English