Configuring X.25 Load Sharing - 3Com MSR 50 Series Configuration Manual

300 C 14: X.25
HAPTER AND
n
Configuring X.25 Load
Sharing
LAPB C
ONFIGURATION
To do...
Enable X.25 switching
Add an X.25 Add a PVC
switching
route
Add an SVC
Enabling/Disabling X.25 switching only affects call establishment, and not affects
the established links.
The switching routes can be configured after x.25 switching enabled. If you
disable the switching (using undo x25 switching command) after configuring
some switching routes, then
All static SVC routes will display invisible, while PVC routes display visible.
■
If you execute the x25 switching command again without restart, SVC routes
■
will be restored and visible upon using the display command.
At this time, if you execute the save command and restart, all SVC and PVC
■
routes will be lost.
Since the default two-way channel range: LTC=1, HTC=1024 does not support
PVC configuration, you need to specify a VC range using the x25 vc-range
command to create a PVC.
Overview of X.25 load sharing
Using the hunt group feature in X.25 protocol, network providers can provide the
load sharing function on X.25 packet switching network. X.25 load sharing can
implement the load sharing between different DTEs or between different links in
the same DTE, to ensure that link overload will not occur when a large number of
users access the same address.
X.25 load sharing is provided by DCE. To implement load sharing on X.25
network, you need to configure a set of DTE/DCE interfaces (synchronous serial
interface or XOT channel) as a hunt group on the remote DCE, and to assign an
X.121 address to this hunt group. When accessing the DTE in hunt group, other
devices in the network need to call the hunt group address. After receiving call
request packet, the remote DCE will select a line from hunt group and send
incoming call packet based on different channel selection policies (round-robin or
Use the command...
x25 switching
interface interface-type
interface-number
x25 vc-range { bi-channel ltc htc
[ out-channel loc hoc ] |
in-channel lic hic [ bi-channel ltc
htc ] [ out-channel loc hoc ] |
out-channel loc hoc }
x25 switch pvc pvc-number1
interface interface-type
interface-number [ dlci
dlci-number ] pvc pvc-number2
[ option ]
x25 switch svc [ -number ]
x.121-address [ sub-dest
destination-address | sub-source
source-address ] * interface
interface-type interface-number
[ dlci dlci-number ]
Remarks
Required
Disabled by default
Select either one