HPE FlexNetwork MSR Series Comware 5 Layer 2 - Wan Access Configuration Manual page 341

Figure 128 X.25 load sharing scenario
Figure 128, server A and server B, which are providing identical services, are assigned to hunt
In
group HG 1. Server A and server B use the address 9999, and the hunt group uses the address 8888.
Enable destination address substitution on Router A to replace the address 8888 with the address
9999. When a user calls the destination address 8888, Router A redirects the call to the address
9999 and then transmits it to server A or server B. Router A processes all calls to the address 8888 in
this way to load balance the calls between server A and server B, preventing a single server from
being overloaded when the other is idle.
You can configure an X.25 hunt group to select lines in either round-robin mode or vc-number mode:
•
The round-robin mode uses a cyclic selection method to select the next interface or XOT
channel inside the hunt group for each call. For example, in
the round-robin mode, the call will be sent in turn to server A or server B.
•
The vc-number mode selects the interface with the maximum idle logical channels inside the
hunt group for each call. For example, in
mode, the remaining logical channels of the lines between server A and DCE are 500, and
those of the lines between server B and DCE are 300. The first 200 calls will be sent to server A,
and the subsequent calls will be sent in turn to server A or server B.
An X.25 hunt group can comprise both synchronous serial interfaces and XOT channels. It can
select a line from them indiscriminately. However, you cannot assign XOT channels to a hunt group
in vc-number mode, because the device cannot calculate the number of logical channels.
Configuration procedure
If your device is operating as a DCE, you can configure it to perform load sharing.
To perform load sharing, you must set the call destination on the source DTE as a hunt group
address.
A hunt group can contain up to 10 synchronous serial interfaces, Annex G DLCIs, or XOT channels.
You cannot add XOT channels to a hunt group configured with the vc-number mode.
To configure X.25 load sharing on a DCE:
Step
Enter system view.
1.
Enable X.25 switching.
2.
Create an X.25 hunt group
3.
and enter its view.
Figure 128, if the hunt group HG 1 uses the vc-number
Command
system-view
x25 switching
x25 hunt-group
hunt-group-name { round-robin |
vc-number }
330
Figure 128, if hunt group HG 1 uses
Remarks
N/A
Not enabled by default.
N/A