3.3 Management and Traffic Interfaces


This section will introduce you to the two types of interfaces available on the routers: management and traffic. A management interface is a physical or virtual port through which the router can be configured, maintained , or monitored , but which does not route traffic. A traffic interface is one through which routable network conversations are forwarded.

Several methods are provided that permit for the management and administration of the routers. These interfaces to the router include the following:

  • SNMP ”Network engineering staff or administrators can not only learn about the health and activity of the router through SNMP, but can also configure it from a network management workstation using any popular SNMP tool. The benefit of this is that it makes configuration management simple. Past configurations can be archived (and dated) on the management station. It also means that many remote routers can be managed and configured from a central workstation.

  • User CLI ”The user process running on the routing engine permits management of the router through the CLI. The network engineer or administrator can, in this way, configure routing protocols, interface specifics, and systemwide instructions through a console, workstation, or laptop.

  • Craft interface ”The craft interface, as we discussed in Section 3.2.1.4, provides a window into the operations of the router ”its health, uptime, and alarms. The craft interface also allows the administrator to take an FPC offline for removal and maintenance.

Table 3-4 shows the types of traffic interfaces that each M-Series model can support:

Table 3-4. Traffic Interface Types per Model
PIC Type M5 and M10 M20 and M40 M160

ATM

4-port DS-3

4-port E3

2-port OC-3/STM-1 MM and SMIR

1-port OC-12/STM-4 MM and SMIR

Uses all ATM types Uses all ATM types Uses all ATM types

Channelized DS-3

2-port DS-3 with 28 T1 channels per port

4-port DS-3 with 28 T1 channels per port

Uses both Uses the 4 port only Uses the 4 port only

Channelized OC-12 to DS-3

1-port OC-12 SMIR with 12 DS-3 channels

per port

Yes Yes Yes

Channelized STM-1 to E1

1-port STM-1 SMIR with 63 E1 channels

per port

Yes Yes Yes

DS-3

2-port

4-port

Uses both Uses the 4 port only Uses the 4 port only
E1

4-port

Yes Yes Yes

E3

2-port

4-port

Uses both Uses the 4-port only Uses the 4-port only

Fast Ethernet

4-port

48-port

Uses the 4-port only Uses the 4-port only Uses both

Gigabit Ethernet

1-port LH, LX, SX

2-port LX and SX

4-port SX

Uses the1-port only Uses the1-port only Uses all
SONET/SDH      
2-port OC-3c/STM-1 MM and SMIR Yes No No
4-port OC-3x/STM-1 MM and SMIR Yes No No
1-port OC-12c/STM-1 MM and SMIR both in concatenated and nonconcatenated modes Yes No No
4-port OC-3c/STM-1 MM and SMIR No Yes Yes
1-port OC-12c/STM-4 MM and SMIR both in concatenated and nonconcatenated modes No Yes Yes
4-port OC-12c/STM-4 MM and SMIR No No Yes
1-port OC-48c/STM-16 SMSR concatenated and nonconcatenated modes No Yes Yes
1-port OC-48c/STM-16 SMLR concatenated and nonconcatenated modes No Yes No
1-port OC-192x/STM-64 SR2 and LR both in concatenated and nonconcatenated modes No No Yes

T1

4-port

Yes Yes Yes
Tunnel Services PIC Yes Yes Yes

The difference between the models lies primarily in the number of ports supported and in the type of throughput that is available on the backplane. Table 3-5 lists the type of throughput, the number of PICs supported, and the number of ports for each model.

Table 3-5. Port Density by Model
Model M5 M10 M20 M40 M160
Full-Duplex Throughput 6.4Gbps 10Gbps 20Gbps 40Gbps 160Gbps
Target Network Size Medium to Large Medium to Large Medium to Large Large Very Large
Number of PICs Supported 4 8 16 32 32
Number of Ports Up to 16 Up to 32 Up to 64 Up to 128

Up to 32 OC-12

or

Up to 32 OC-48

or

Up to 8 OC-192

It is important to note that, by default, all physical interfaces on the Juniper Networks routers use PPP, but can be configured to use other Layer 2 encapsulation types. If an interface is of a type that does not support PPP, you must configure the appropriate encapsulation type. For specific information about interface encapsulation options, including configuration examples, please refer to Chapter 8.



Juniper Networks Reference Guide. JUNOS Routing, Configuration, and Architecture
Juniper Networks Reference Guide: JUNOS Routing, Configuration, and Architecture: JUNOS Routing, Configuration, and Architecture
ISBN: 0201775921
EAN: 2147483647
Year: 2002
Pages: 176

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