3Com MSR 50 Series, Руководство по настройке

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302 C
HAPTER
14: X.25
AND
LAPB C
ONFIGURATION
X.25 hunt group supports two call channel selection policies: round-robin mode
and vc-number mode. However, a hunt group only uses one policy.
■
The round-robin mode uses a cyclic selection method to select next interface or
XOT channel inside hunt group for each call. For example, in the above figure,
if the hunt group HG 1 uses 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 logic
channels inside hunt group for each call. For example, in the above figure, if
the hunt group HG 1 uses the vc-number mode, the remaining logic channels
of the lines between server A and DCE are 500, while those of the lines
between server B and DCE are 300. Thus, 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.
X.25 hunt group supports synchronous serial interface and XOT channel, and can
select the available lines between them indistinctly. However, since XOT channel
cannot calculate the number of logic channels, it will not be added to the hunt
group that uses the vc-number selection policy.
X.25 network load sharing is configured on DCE device. In most cases, your device
is used as DTE device in X.25 network. The network providers provide the load
sharing function on packet switch. In this way, no special configuration is required
on the device. For the specific configuration procedure, refer to the previous
chapters. When it is used as DCE device in X.25 network, it provides load sharing
function for DTE device. At this time, X.25 load sharing needs to be configured on
it.
n
You need not configure the hunt group address, and only need to set the
destination address as the hunt group address on the source DTE.
Configuration procedure
To configure X.25 load sharing, use the following commands:
Note that:
To do... Use the command... Remarks
Enter system view system-view -
Enable X.25 switching x25 switching Required
Not enabled by default
Create an X.25 hunt group
and enter its view x25 hunt-group hunt-group-name
{ round-robin | vc-number }
Required
Add an interface or Annex G
DLCI to the hunt group channel interface interface-type
interface-number [ dlci
dlci-number ]
Required
Add an XOT channel to the
hunt group channel xot ip-address
Exit to system view quit -
Create an X.25 switching
route to the hunt group x25 switch svc x.121-address
[ sub-dest destination-address |
sub-source source-address ] *
hunt-group hunt-group-nam e
Required
Not created by default.