
3 Terminal and Telnet Management
CommPlete Communications Server 29
the case in a typical ISP setup, where there might be one telephone number and
several RASExpress servers.
Note: All MultiChassis Multilink servers must have IP and PPTP turned on to enable
the servers to talk to each other. Also, all MultiChassis Multilink servers should point
to the same RADIUS or TACACS+ server.
Multilink PPP
Select enabled to enable Multilink PPP (MLPPP) support on the RASExpress server.
RASExpress supports Multilink PPP for both analog and ISDN channels.
Group EPD
Identifies the bundle group that the RASExpress server belongs to. The EPD (End
Point Descriminator) is an arbitrary four-byte hexadecimal value. By default
RASExpress initializes it to the IP address of its Ethernet interface. However, all
servers that belong to the same bundle group should have the same EPD.
Bundle Server IP Address
Type the IP address of the Bundle Server. The Bundle Server is the RASExpress 5.40
or later server chosen to manage the multichassis multilinks. Though it can be any
RASExpress 5.40 server on the network, ideally it is one that is equidistant from all
RASExpress servers in the bonding group. If the servers are on different networks,
then the hop count from the Bundle Server to all the other servers should be more or
less equal. Alternately, the one that is least busy can function as the Bundle Server.
Bundle Server UDP Port
Identifies the UDP port number that the RASExpress server uses to communicate
between itself and the Bundle Server.
MAC Layer Bridging
Menu path: Main Menu ➔ Configuration of Server ➔ Server Setup ➔ MAC Layer
Bridging .
[ 1] Bridging : disabled
[ 2] Spanning Tree : disabled
[ESC] to go to previous menu
Use this menu to configure MAC (Media Access Control) layer bridging for the
RASExpress server.
Bridging
Select enabled to enable the server to bridge all MAC layer packets. The default is
disabled. If you do not use networking protocols other than IP and IPX, you should
disable bridging, since it slows down the RASExpress server by requiring the router
to examine each and every packet on the connected LAN segment. However, you
need bridging to support networking protocols like NetBIOS. Note that if you enable
bridging for the RASExpress server but disable routing of IP or IPX on a specific port,
bridging of those protocol packets will not take place on that port. However, if you
disable IP or IPX entirely for the RASExpress server, then those packets will be bridged.
Spanning Tree
Spanning Tree bridging is used to detect looped back links. The default is disabled.
This option is unavailable when Bridging is disabled.
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