Chapter 8 Access Service
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Note: By default, switch doesn’t configure source address,
when NTP send time synchronization request, IP address
that the message need is decided by network layers.
4. To view NTP status, use command show ntp in global
configuration mode. This is shown in
Table 314.
TABLE 314 SHOW NTP COMMAND
Format Mode Function
show ntp global config This views NTP
status
Result: This views NTP status.
E
ND OF STEPS
NTP has been configured.
In this example, switch will synchronize time with NTP server
whose IP address is 202. 10. 10. 10.
Configuration
zte(cfg)#set ntp server 202. 10. 10. 10
zte(cfg)#set ntp enable
zte(cfg)#show ntp
ntp protocol is enable
ntp protocol version : 3
ntp server address : 202. 10. 10. 10
ntp source address : None
ntp is_synchronized : No
ntp rcv stratum : 16
no reference clock.
zte(cfg)#
In the output, ntp is_synchronized represents whether switch
has synchronized time with NTP server.
GARP/GVRP Overview
GARP (Generic Attribute Registration Protocol) uses different
protocols to dynamically distribute attribute information, such
as VLAN and MAC address of multicast for members in switch
network.
GVRP (GARP VLAN Registration Protocol) is a kind of protocol
defined by GARP. GVRP can dynamically maintenance
information of VLAN in switches.
One switch which supports GVRP can receive information of
VLAN registration from other switches and dynamically update
local information of VLAN registration including current VLANs in
switch and interfaces in these VLANs.
Result
Example:
GARP uses
Protocols
GVRP