2.12.2. TYPE IFDATA - Changing the Interface-Specific Parameters
of the Access Point 
The settings can differ from access point to access point.
The following parameters can be set:
- For the physical Ethernet interface [
BITRATE] - For QoS support on Layer 2 to IEEE 802.1 q/q [
VLAN, VLANID] - For QoS support on Layer 3 to IETF RFC 2474 (DiffServ) [
TOSLAN, TOSMODEM]
The Ethernet interface setting must be identical for both connected interface
partners (HG 3575 or LAN switches, routers).
IMPORTANT:
The setting of a fixed interface partner leads to problems with the
“Autonegotiate“ setting of the other partner. Incorrect settings cannot normally be
detected by
the system and therefore go unreported. If one device is operating in full duplex
and the other
in half duplex mode, this is not immediately noticeable. Where there is a high payload,
the
device set to half duplex will report a higher number of late collisions and the packet
delay
will increase sharply. If the LAN port connected to the HG 3575 does not support autonegotiation
or if it does not work reliably, fixed values must be set for the HG 3575’s Ethernet
interface.
VLAN tagging should only be activated when all routers in the network segment of the
access
point support VLAN tagging. The same applies for the DiffServ CodePoints. If the routers
do not
support DiffServ, the standard TOS values must be configured without DiffServ. If
DiffServ is
supported, but not the CodePoints, the values specified by the network carrier must
be
configured.
Given that some network component vendors only support prioritization with VLAN ID
> 0
pursuant to IEEE 802.1 p/q, the VLAN ID can also be set. The HG 3575 module generally
sets the
priority bits when the VLAN option is activated. For values, see Table 3, “TOS values”.
According to the standard, the VLAN ID must then be set to zero, which also happens
for the
default setting.
In the example, VLAN tagging is deactivated (reset to the default value), the standard
TOS
values are configured without DiffServ (see Table 3, “TOS values”) and the Ethernet interface is set to
10 Mbps half duplex.
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Configuration Management > System Data > IPDA > IPDA Access Point
Click Search and select the access point.
Enter the TOS bytes under Layer 2 and Layer 3 on the Quality of Service tab.
Set the transmission speed and mode on the Ethernet Interface tab and
Save.
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CHANGE-STMIB:MTYPE=NCUI2,LTU=99,TYPE=IFDATA,VLAN=NO,
TOSLAN=20,TOSMODEM=16,BITRATE=100MBFD; |
This change does not become effective until the access point is restarted.
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Configuration Management > System Data > IPDA > IPDA System Data
Click Search and select the access point. Click Execute on the
Action pull-down menu and select the mode of action Update AP, confirm with
OK.
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EXEC-USSU:MODE=UPDATAP,LTU=99; |
IMPORTANT:
Connections are cleared down without further warning. Prior to the
EXEC-USSU:UPDATAP, the configuration must be updated on the system hard disk.