Configuring The Local Source Interface For Sending And Receiving Ntp Packets; Limit On The Number Of Local Dynamic Sessions - Huawei AR530 Series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Device Management
4.5.2 Configuring the Local Source Interface for Sending and
Receiving NTP Packets
You can configure a local source interface for sending and receiving NTP packets to prevent the
IP addresses of other interfaces on the device becoming the destination address of a reply packet.
This facilitates deployment of traffic control policies.
Prerequisites
All configurations of basic NTP functions have been completed.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
ntp-service [ ipv6 ] source-interface interface-type interface-number [ vpn-
instance vpn-instance-name ]
The local source interface for sending and receiving NTP packets is configured.
By default, the local source interface for sending NTP packets is not specified. The source IP
address of an NTP packet is selected according to the route.
In the broadcast, multicast, and manycast modes, the NTP service is performed on the source
interface and the ntp-service source-interface command does not take effect.
If the specified NTP source interface is in Down state, the source IP address of a sent NTP packet
is the primary IP address of the packet's outbound interface.
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Checking the Configuration
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4.5.3 Limit on the Number of Local Dynamic Sessions

Excess dynamic sessions limit the number of static sessions. To address this problem, you can
limit the number of dynamic sessions on the device.
Prerequisites
All configurations of basic NTP functions have been completed.
Issue 01 (2014-11-30)
NOTE
If the ntp-service unicast-server or the ntp-service unicast-peer command specifies the source interface
of NTP packets, the specified source interface takes effect.
Run the display current-configuration | include ntp command to check the configuration
about the local source interface for sending and receiving NTP packets.
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