Task - 3Com MSR 50 Series Configuration Manual

158 C 6: DCC C
HAPTER ONFIGURATION
Complete these tasks to configure basic parameters for DCC:

Task

"Configuring physical interfaces" on page 158
"Associating a DCC dial ACL with the dial
interface" on page 158
"Configuring link layer/network/routing
protocol on the dial interface" on page 158
Configuring physical interfaces
For a synchronous/asynchronous serial interface, you must set its operating mode
depending on the connected modem. If the connected modem is asynchronous,
set the interface to operate in asynchronous mode and then enable modem dial
on the corresponding user interface. If the connected modem is synchronous, set
the interface to operate in synchronous mode.
For detailed configurations, refer to
and "Modem Configuration" on page
Configuring link layer/network/routing protocol on the dial interface
In dial interface (physical or dialer) view, configure link layer protocol
encapsulation with the link-protocol command and assign the dial interface an IP
address with the ip address command.
In system view, perform other configurations.
When PPP encapsulation is configured, you may configure PAP or CHAP
authentication in addition. Moreover, consider the following when configuring
PPP related commands:
In C-DCC approach, make the configuration on dialer interfaces.
■
In RS-DCC approach, make the configuration on dialer interfaces and
■
preferably the same configuration on physical dial interfaces on the calling side
to guarantee the reliability of PPP link parameters negotiation; on the called
side, make the configuration on physical dial interfaces.
For detailed configurations, refer to Access Volume, IP Services Volume, and IP
Routing Volume.
Associating a DCC dial ACL with the dial interface
You may configure a dial ACL to filter traffic that traverses a dial interface. Packets
fall into two categories, depending on whether they are in compliance with the
permit or deny statements in the dial ACL.
Packets that match a permit statement or that do not match any deny
■
statements. When receiving such a packet, DCC either sends it out if a link is
present and resets the idle-timeout timer or originates a new call to set up a
link if no link is present.
Packets that do not match any permit statements or that match a deny
■
statement. When receiving such a packet, DCC either sends it out without
Remarks
Optional
Skip this task when configuring on ISDN BRI
or PRI interfaces.
Required
Required
"WAN Interface Configuration" on page 99
355.