HP 5500 Ei 5500 Si Switch Series Configuration Guide

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Figure 16 Network diagram  
 
 
Configuration procedure 
1. Set the IP address for each interface as shown in  Figure 16. (Details  not shown.) 
2. Configure Device A: 
# Configure the Device A to operate in NTP br oadcast client mode and receive NTP broadcast 
messages on VLAN-interface 2. 
 system-view 
[DeviceA] interface vlan-interface 2 
[DeviceA-Vlan-interface2] ntp-service broadcast-client 
3.  Configure Device B: 
# Enable NTP authentication on Device B. Configur e an NTP authentication key,...

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 Actual frequency: 64.0000 Hz  
 Clock precision: 2^7 
 Clock offset: 0.0000 ms  
 Root delay: 31.00 ms  
 Root dispersion: 8.31 ms  
 Peer dispersion: 34.30 ms  
 Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02) 
The output shows that Device A has synchronized to Device C because it has a higher stratum than 
Device C. 
# Display the NTP session information of Device A. 
[DeviceA-Vlan-interface2] display ntp-service sessions 
      source    reference    stra  reach  poll  now...

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 Clock precision: 2^7 
 Clock offset: 0.0000 ms  
 Root delay: 31.00 ms  
 Root dispersion: 8.31 ms  
 Peer dispersion: 34.30 ms  
 Reference time: 16:01:51.713 UTC Sep 19 2005 (C6D95F6F.B6872B02) 
The output shows that Device B has synchronized to Device C because it has a higher stratum than 
Device C. 
# Display the NTP session information of Device B. 
[DeviceB-Vlan-interface2] display ntp-service sessions 
      source    reference    stra  reach  poll  now  offset   delay  disper...

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Configuring the information center 
This chapter describes how to configure the information center.  
Overview 
The information center classifies and manages system information so that network administrators and 
developers can monitor network performa nce and troubleshoot network problems. 
The information center operates as follows: 
•   Receives system information including log, trap, and debugging information generated by each 
module. 
•   Outputs the information to different informat ion...

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By default, the information center is enabled. It affects system performance to some degree when it is 
processing large amounts of information. If the syst em resources are insufficient, disable the information 
center to save resources. 
Classification of system information 
The system information falls into the following types: 
•   Log information 
•   Trap  i n fo rm a t io n  
•   Debugging information 
System information levels 
The system information is classified into eight severity levels,...

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Information 
channel number
 
Default channel 
name Default output 
destination
 Description 
1 monitor Monitor 
terminal Receives log, trap and debugging information, 
facilitating remote maintenance. 
2 loghost Log host Receives log, trap and debugging information 
and information will be stored in files for future 
retrieval. 
3 trapbuffer Trap 
buffer Receives trap information, a buffer inside the 
device for recording information. 
4 logbuffer Log 
buffer Receives log and debugging information,...

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Table 3 Default output rules for different output destinations 
Output 
destination  Modules 
allowed LOG TRAP
 DEBUG 
Enabled/
disabled
 Severity 
Enabled/
disabled Severity  Enabled/
disabled Severity 
Console  default (all 
modules) Enabled  Informa- 
tional Enabled Debug  Enabled Debug 
Monitor 
terminal  default (all 
modules) 
Enabled  Informa- 
tional Enabled Debug  Enabled Debug 
Log host  default (all 
modules) Enabled  Informa- 
tional Enabled Debug  Disabled Debug 
Trap buffer  default...

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Output destination Format Example 
Log host 
• HP format: 
timestamp 
Sysname %%vvmodule/level
/digest: source content 
• UNICOM format: 
timestamp Sysname 
vvmodule/level/serial_numb
er: content 
• HP format:  
Oct 9 14:59:04 201 
MyDevice %%10SHELL/5/SHELL_LOGIN(l):
VTY logged in from 192.168.1.21 
• UNICOM format: 
{  Oct 13 16:48:08 2011 HP 
10IFNET/2/210231a64jx073000020: 
log_type=port;content=Vlan-interface1 
link status is DOWN. 
{ Oct 13 16:48:08 2011 HP 
10IFNET/2/210231a64jx073000020:...

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Table 5 Description on the time stamp parameters 
Time stamp 
parameter  Description Example 
boot  Time since system startup, in the format of 
xxxxxx.yyyyyy, where xxxxxx represents the 
higher 32 bits, and yyyyyy represents the 
lower 32 bits. 
System information that is sent to all 
destinations except the log host supports this 
parameter.
  %0.109391473 Sysname 
FTPD/5/FTPD_LOGIN: User ftp 
(192.168.1.23) has logged in 
successfully. 
0.109391473 is a time stamp in the 
boot 
format. 
date...

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vv 
This field is a version identifier of syslog, with a value of 10. It is displayed only when the output 
destination is log host. 
module 
The module field represents the name of the module  that generates system information. You can enter the 
info-center source ?  command in system view to view the module list. 
level (severity) 
System information is divided  i n t o  e i g h t  l e v e l s  b a s e d  o n  i t s  s e v e r i t y,  f r o m  0  t o  7.  S e e   Tabl e  1 for definitions 
and...