192 SBC session border controllers
During redundancy, 2 types of front-port are allocated on the device, these are local and global. On SBC-1000,
the local port is 0, the global ports are 1 and 2, on the SBC-2000 the local ports are 0 and 1, the global ports are 2
and 3. When connecting devices, you need to communicate simultaneously on a local and global link. The
redundancy scheme works over IPv6, during which the devices exchange configuration and other files necessary to
maintain up-to-date information. The local link uses 4091 VLAN, the global 4092 VLAN. In the case of a break in the
local link, the devices exchange operating files on the global link.
If one of the links is disconnected, the device initiates an alarm.
Reserve connection and configuration procedure
Consider the case of connecting to two MES switches in a stack (Figure 35). Initial state: two SBC of the same
type with a reserve license, two MES switches in the stack. The stack on the switches should be configured according
to the switch documentation.
First, you should configure the service VLAN pass-through on the switches. On the ports where the global SBC
links will be connected, VLAN 4092 must be allowed to pass through. The ports must also pass through other VLANs
configured on the SBC. In addition, the ports to which the SBC will connect should be combined into a port-channel.
The final scheme at this stage will look as follows:
Figure 35 — Scheme of the ports association in the port-chanel
The next step is to connect the master SBC. At this stage, only the global links are connected. The SBC is then
started and becomes the master. The scheme at this stage will look as follows:
Figure 36 — Master SBC connection scheme
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