Juniper JUNOS, Руководство по эксплуатации сети

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Verifying SFM Failure
! 355
Chapter 26: Monitoring the SFMs
What It Means
The chassisd database provides the date, time, and a component status message.
The
chassisd
database is dynamic. It is initialized at router startup and is updated
when components are added or removed. You can search for multiple items in the
chassisd log file by using the | match “item |item |item” command. For example,
| match “sfm|kernel|tnp” is a search for error messages for the SFM, kernel, and
Trivial Networking Protocol (TNP), and indicates communication issues between the
Routing Engine and the Packet Forwarding Engine components.
Verifying SFM Failure
Steps To Take
To verify SFM failure, follow these steps:
1. Check the SFM Connection on page 355
2. Check the SFM Fuses on page 355
3. Perform an SFM Swap Test on page 356
Step 1: Check the SFM Connection
Action
To check the SFM connection, make sure that it is properly seated in the midplane.
Check the thumbscrews on the ejector locking tabs.
Step 2: Check the SFM Fuses
Action
Check for blown SFM fuses.
The M40e and M160 router fuses are located in a fuse box at the rear of the
midplane, behind the lower rear impeller assembly. You must remove the lower
impeller assembly to access the fuses, as described in the
M40e Router Hardware
Guide .
When the fuse for an SFM blows, the SFM stops functioning even though it is
installed correctly and the power supplies are providing power to the router.
For the M40e and M160 routers, when a fuse has blown but the power supplies are
still delivering power to router, the amber LED adjacent to the fuse lights. See
Figure 146.
Figure 146: M40e M160 Router Fuses
J240
A
B
C
D
J241
A B C D
J244
A B C D
J242
A B C D
J243
A B C D
MCS0 12A MCS1 12A
SFM0 10A SFM1 10A SFM2 10A
FPC4 15A
FPC2 15A
FPC1 15A
FPC0 15A
PCG0
1A
15A
SFM3 10A
SP
ARE 1A
SP
ARE 10A
SP
ARE 12A
SP
ARE 15A
FPC7 15A FPC6 15A FPC5 15A
1238
1A
PCG1 FPC3