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Troubleshooting JUNOS Platforms
The slide shows the list of interface media types.
InterfaceReproductionM dia Ty s
IP Services PICs
forIP Se vices PICs provide value-added services such as tunneling or the management multilink bundles. IP Services PICs do not have ports or media associated with
them, but they do have two-letter interface type designations as shown in the following list:
•es: Encryption interface;
•gr: Generic route encapsulation tunnel interface;
•ip: IP-over-IP encapsulation tunnel interface;
•ls: Link services interface;
•ml: Multilink interface;
•mo: Passive monitoring interface;
•mt: Multicast tunnel interface;
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Overview of JUNOS Platforms • Chapter 2–67
Troubleshooting JUNOS Platforms
IPServices PICS (contd.)
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sp: Adaptive services interfaces; and |
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vt: Virtual loopback tunnel interface. |
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Internally generated and nonconfigurable interfaces include the following: |
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Chapter 2–68 • Overview of JUNOS Platforms
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IdentifyingReproductionTransi nt Int rfaces
The interfac ’s FPC slot number, the PIC slot number, and the PIC’s physical port number in the form of m dia-type-fpc-slot/pic-slot/port-number, identify transient interfaces. Channelized interfaces identify a particular subchannel with the addition of a suffix in the form of :sub-channel-number. We identify a
forlogical unit (also referred to as a subinterface) with a suffix in the form of
.logical-interface-number.
FPC and PIC Slot Numbering Varies
The FPC and PIC slot numbering varies by platform due to some platforms using vertically aligned FPC slots while other platforms use a horizontal FPC arrangement. The graphic shows typical FPC and PIC numbering in the T640, which makes use of vertically aligned FPCs.
FPC and PIC Slot Labeling
Each platform has labels that clearly identify the FPC slot number and PIC number. Furthermore, each PIC has a label to identify the number associated with that PIC’s physical ports.
Overview of JUNOS Platforms • Chapter 2–69
Troubleshooting JUNOS Platforms
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This Chapter Discuss d: |
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Juniper N tworks platforms running JUNOS Software and their typical |
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Gene al platform architecture; |
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The functions of major components of the platforms; |
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Operation of the Craft Interface; and |
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Interface naming conventions and the role of logical units. |
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Chapter 2–70 • Overview of JUNOS Platforms
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Overview of JUNOS Platforms • Chapter 2–71
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Chapter 2–72 • Overview of JUNOS Platforms
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Chapter 3: Troubleshooting Tool K f JUNOS |
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This Chapter Discuss s: |
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Warnings and cav ats garding potentially disruptive commands and |
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Layered troubleshooting methodology; |
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Va ious troubleshooting tools supported by JUNOS Software; and |
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c nfiguration settings for ease of troubleshooting. |
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Chapter 3–2 • Troubleshooting Tool Kit for JUNOS Platforms
Troubleshooting JUNOS Platforms
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Caveats and Warnings |
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Troubleshooting Tool Kit for JUNOS Platforms • Chapter 3–3
Troubleshooting JUNOS Platforms
Potential Disruptions
Troubleshooting a communications twork involves the use of numerous tools. As with all tools, a pot ntial xists for disruption or harm should you not use a given tool in the manner for which the designers created it.
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In this chapter we discuss several potentially dangerous commands and |
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Chapter 3–4 • Troubleshooting Tool Kit for JUNOS Platforms