Troubleshooting JUNOS Platforms
|
|
Reproduction |
|
|
|
|
|
|
|
M20 Overvi w |
|
|
The M20 is a highrformance routing platform built for a variety of Internet |
|
|
applications, including high-speed access, public and private peering, hosting sites, |
|
|
and network applications. The primary application for the M20 is currently edge |
|
|
agg egation of dedicated access circuits. |
|
|
The M20 leverages proven M Series ASIC technology to deliver wire-rate performance |
|
|
and ich packet processing, such as filtering, sampling, and rate limiting. It runs the |
|
|
same JUNOS Software and supports the same interfaces as other M Series routers, |
|
|
pr viding a seamless upgrade path that protects your investment. Its compact design |
|
|
(14 inches or 35.56 cm high) delivers market-leading performance and port density |
Not |
while consuming minimal rack space. You can install as many as five M20 units into a |
|
forsingle 19-inch equipment rack. |
JUNOS Platform Details • A–71
Troubleshooting JUNOS Platforms
|
l adReproduction-balanced between them. |
|
|
|
|
M20 Hardware Compon nts |
The hardware compon nts for the M20 include the following: |
• |
Sheet metal chassis. |
• |
Two power supplies (AC or DC): The maximum chassis power draw is |
for |
|
1200 watts. Power supplies can be either AC or DC, but you cannot mix |
|
power supply types. When two power supplies are present, power is |
• |
F ur fan assemblies. |
• |
One or two REs. |
• |
One or two SSBs. |
• |
Up to four FPCs: Each is populated with up to four PICs for various |
|
interface types, including OC48, OC12, OC3 SONET/SDH (including |
|
channelized OC12); OC12, OC3 ATM, DS3, Gigabit Ethernet, and Fast |
|
Ethernet. |
Although the M20 supports RE and system board redundancy, hot PIC swapping is not available. To replace or install a PIC, you must first remove the target FPC from the system. Removing or inserting an FPC results in an approximately 100 millisecond period of packet loss. Be sure to gracefully remove the FPC by depressing the FPC offline button until the green OK light extinguishes. Upon insertion, the FPC automatically comes back online.
A–72 • JUNOS Platform Details
Troubleshooting JUNOS Platforms
|
|
|
Reproduction |
|
|
|
|
|
|
|
|
M40 Overvi w |
|
|
The M40 was the first platform shipped by Juniper Networks. Although it is still |
|
|
supported, w r platforms, such as the M40e, are eclipsing the original M40 due to |
|
|
improvements in redundancy, form factor, and support for newer PIC types. |
Not |
for |
|
|
|
|
|
|
|
JUNOS Platform Details • A–73
Troubleshooting JUNOS Platforms
The M160 was the first fullrformance OC192c (STM64) platform on the market. By providing aggregate forwarding rat s of 160 Mbps and aggregate throughput exceeding 160 Gbps, this platform enables you to grow networks rapidly and reliably while taking advantage of increased optical bandwidth.
M160 OverviewReproduction
forAn ASIC-based packet forwarding path enables full wire-rate forwarding over 10 Gbps circuits. Key to this performance is the Internet Processor II ASIC and the custom made SONET p ocessing ASIC used in the OC192c (STM64) interface.
The M160 ffers a complete range of flexible and dense interfaces, allowing you to fit M160 uters into existing environments seamlessly. The platform supports up to 32 OC48c (STM16) PICs per chassis (64 per standard rack) or up to eight OC192c (STM64) PICs per chassis (16 per rack).
The M160 provides a scaleable solution using the same JUNOS Software and the same ASICs, and supporting the same value-added services as all other M Series routers.
A–74 • JUNOS Platform Details
Troubleshooting JUNOS Platforms
|
|
|
|
|
|
|
|
Reproduction |
|
|
|
|
|
|
M160 Hardware Com onents |
|
The hardware compon nts for the M160 include the following: |
|
|
• |
Two DC-only Power Entry Modules: The maximum chassis power is 3150 |
|
|
|
watts (65 A at -48 VDC) when fully loaded. When both PEMs are present, |
|
for |
|
power to the chassis is load-balanced between them. |
|
• |
Sheet metal chassis. |
|
|
|
|
• |
Redundant cooling. |
|
|
• |
One or two host modules: RE and MCS work in pairs for host module |
|
|
|
redundancy. The MCS provides control of chassis power, environmental |
|
|
|
control systems, online and offline of system components and Stratum 3 |
|
|
|
synchronization reference. |
|
|
• |
Four SFMs for redundant switch fabric. |
|
|
• |
Connector Interface Panel. |
|
|
• |
Redundant Packet Forwarding Engine Clock Generators provide |
|
|
|
redundant synchronization signals to the hardware components in the |
|
|
|
PFE. |
Continued on next page.
JUNOS Platform Details • A–75
Troubleshooting JUNOS Platforms
M160 Hardware Components (contd.)
•Up to eight FPCs: Populated with up to four PICs for various interface types, including OC48, OC12, O-3 SONET/SDH (including channelized OC12), OC12, OC3 ATM, DS3, Gigabit Ethernet, and Fast Ethernet. FPC1 supports legacy M20 and M40 PICs, while the native FPC2 is for high-speed PICs like the OC48c (STM16) and 48-port Fast Ethernet PICs.
A–76 • JUNOS Platform Details
Troubleshooting JUNOS Platforms
|
|
|
Reproduction(SRX Series); and |
|
|
|
|
|
|
|
|
This App |
ndix Discuss d: |
|
|
|
• |
Primary components and characteristics of multiservice edge routers |
|
|
|
|
(M S ri s and T Series); |
|
|
|
• |
Primary components and characteristics of Ethernet services routers and |
|
|
for |
|
switches (MX Series and EX Series); |
|
|
• |
Primary components and characteristics of security services gateways |
|
|
|
|
|
|
• |
End-of-life products. |
Not |
|
|
|
|
|
JUNOS Platform Details • A–77
Troubleshooting JUNOS Platforms
A–78 • JUNOS Platform Details
•
•
• for
Troubleshooting JUNOS Platforms
This AppendixReproductionDiscuss s:
Real-time op rating system (RTOS) packet flow;
ABC chipset packet flow; and
LMNR chipset packet flow.
Not
B–2 • Packet Flow Details
