- Juniper Networks Router Models
- Architecture Overview
- Management and Traffic Interfaces
- Cooling Systems
- Router Power-up and Boot Process
- JUNOS Software Upgrade Procedure
- JUNOScript
- Chapter Summary
This chapter is from the book
This chapter is from the book
This chapter is from the book
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 |
Uses all |
Uses all |
Uses all |
|
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 |
ATM types |
ATM types |
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 Channelized OC-12 to DS-3 |
Uses both |
Uses the 4 port only |
Uses the 4 port only |
|
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 the 1-port only |
Uses the 1-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.