R2511-HP MSR Router Series Interface Configuration Guide(V5)

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It supports link layer protocols such as PPP, FR, LAPB, and X.25 and the network protocols such as
IP and IPX.
2. A CE1/PRI interface in CE1/PRI mode is physically divided into 32 timeslots numbered 0 to 31.
Timeslot 0 is used to transmit synchronizing information. This interface can be used as either a CE1
interface or a PRI interface.
{ When this interface is used as a CE1 interface, all the timeslots except timeslot 0 can be
randomly divided into multiple channel sets and each set can be used as an interface upon
timeslot bundling. Its logical features are the same as those of a synchronous serial interface. It
supports link layer protocols such as PPP, HDLC, FR, LAPB, and X.25, and network protocols
such as IP.
{ When the interface is used as a PRI interface, timeslot 16 will be used as a D channel to transmit
signaling. Therefore, rather than selecting among all the timeslots, you are only allowed to
make a random B channel selection among the timeslot sets except timeslots 0 and 16. The
selected set of timeslots can be bundled together with timeslot 16 to form a PRI set that can be
used as an interface. The logical features of this interface are the same as those of an ISDN PRI
interface. It supports link layer protocols such as PPP, HDLC, FR, LAPB, and X.25, and network
protocols such as IP.
Configuring a CE1/PRI interface in E1 mode
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter CE1/PRI interface view.
controller e1 number N/A
3. Configure the interface to
operate in E1 mode.
using e1
By default, a CE1/PRI interface
operates in CE1/PRI mode.
4. Set other interface
parameters.
See "Configuring other CE1/PRI
interface parameters."
Optional.
After you configure the CE1/PRI interface to operate in E1 mode, the system automatically creates a
serial interface numbered serial interface-number:0. This interface is logically equivalent to a
synchronous serial interface where you can make other configurations such as:
• Parameters of data link protocol such as PPP, FR, LAPB, or X.25
• IP addressing
• Backup center settings if the interface is used as a primary or secondary interface for backup
• NAT and packet filtering if a firewall is to be set up
Configuring a CE1/PRI interface in CE1 mode
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter CE1/PRI interface view.
controller e1 number N/A
3. Configure the interface to
operate in CE1/PRI mode.
using ce1
Optional.
The default operating mode is
CE1/PRI mode.