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LLC2 Frames and PPP LLC2 frames are not sent or received over PPP unless global bridging is enabled
using the SETDefault -BRidge CONTrol = Enabled command. You must enable
LLC2 on the port using:
SETDefault !<port> -LLC2 CONTrol = Enabled.
If bridging is enabled and you do not want bridging, either set the -BRidge
CONTrol parameter to NoForward, or disable bridging on individual ports by
setting the following command:
SETDefault -BRidge TransparentBridge = NoTransparentBridge
Maximum BSC Line
Speed
For V.35 and RS-232 links, the maximum baud rate supported for BSC traffic is
38.4. If the baud rate is higher, BSC traffic suffers errors and retransmissions.
SHDLC Half-Duplex
Mode
SHDLC does not support physical half-duplex mode.
SDLC SDLC requires the following:
■ XID spoofing must be turned on if the IBM Communication Manager is used
for 3270 communications and is defined as a PU type 2.0. Use the following
syntax:
SETDefault !<PU name> -SDLC CUXId = <value> (8 Hexadecimal digits)
SETDefault !<PU name> -SDLC CUXidDefined = Yes
■ SDLC end-to-end through local switching (conversion to a single LLC2 LAN
connection between two NETBuilder bridge/routers) requires different virtual
ring numbers in the LLC2 Service.
SDLC Adjacent Link
Stations for APPN
When you configure SDLC adjacent link stations for APPN, if an active link
becomes inactive and you change the port definition using the PortDef parameter,
the link remains inactive. If you try to reactivate the link using the SET -APPN
LinkStaCONTrol command, the link reactivates within 30 seconds. To activate the
link immediately, you must enable the APPN port using the SET -APPN PortControl
= Enable command.
Source Route
Transparent Bridging
Gateway (SRTG)
Interoperability
The NETBuilder II bridge/router cannot interoperate with Cisco or IBM routers if
the NETBuilder bridge/router is configured using Source Route Transparent
Gateway (SRTG) with Source Route bridging on the token ring LAN port and
Transparent Bridging on the PPP or Frame Relay WAN ports. In this configuration,
the NETBuilder II bridge/router is sending using PPP bridge encapsulation 802.5
token ring format, while the IBM 6611 and the Cisco 400 router are using PPP
bridge encapsulation 802.3 Ethernet format.
SDLC Ports and NetView
Service Point
An SDLC port defined for NetView Service Point cannot be used for SDLC-to-LLC2.
UI Response Time With
Large SDLC
configuration
When NETBuilder bridge/router is configured with many SDLC PUs, SETDefault
commands may take a long time to complete. Using the Defrag command to
streamline the flash that contains the configuration files can fix the problem.
VTAM Program
Temporary Fixes
VTAM Program Temporary Fixes (PTFs) are required on a mainframe when APPN
DLU services are used. Mainframe network management (NetView) services will
not function for downstream physical units (PUs) if the PTFs are not installed.