Snmp Mode; Maintenance Modes; Ping; Traceroute - Raisecom Gazelle S1020i-GL Series User Manual

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Gazelle S1020i-GL (A) User Manual
network, SSH automatically encrypts data every time the device sends data. When data
reaches the destination, SSH automatically decrypts data. In this way, SSH prevents the
Gazelle S1020i-GL from attacks, such as plain text interception.
SSH can replace the Telnet for managing remote devices or provide secure paths for protocols,
such as FTP.

5.1.2 SNMP mode

Simple Network Management Protocol (SNMP) is designed by the Internet Engineering Task
Force (IETF) to solve problems in managing network devices connected to the Internet.
Through SNMP, a network management system can manage all network devices that support
SNMP, including monitoring network status, modifying configurations of a network device,
and receiving network alarms. SNMP is the most widely used network management protocol
in TCP/IP networks.
Till now, SNMP has three versions: v1, v2c, and v3, described as below.
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The Gazelle S1020i-GL supports SNMP v1, SNMP v2c, and SNMP v3.

5.2 Maintenance modes

5.2.1 Ping

Packet Internet Grope (Ping) is the most widely used command for fault diagnosis and
troubleshooting. It is usually used to detect whether two hosts are connected or not. Ping is
achieved with ICMP echo packets. If an Echo Reply packet is sent back to the source address
during a valid period after the Echo Request packet is sent to the destination address, it
indicates the route between source and destination address is reachable.

5.2.2 Traceroute

Traceroute is used to discover the real route through which the packet is transmitted to the
destination. Although the Ping feature can test the connectivity, it cannot record all network
devices on the route limited by the IP header. Traceroute can be used to test routing
information from the source host to the destination host.
SNMPv1 uses community name authentication mechanism. The community name,
which defines the relationship between the SNMP NMS and SNMP proxy, acts as a
password for limiting the access from SNMP NMS to the SNMP proxy. If the
community name carried in a SNMP packet is not authenticated by the Gazelle S1020i-
GL, the packet will be dropped.
Compatible with SNMPv1, SNMPv2c also uses community name authentication
mechanism. SNMP V2c supports more operation types, data types, and errored codes,
and thus better identifying errors.
SNMPv3 uses User-based Security Model (USM) and View-based Access Control
Model (VACM) security mechanisms. You can configure authentication and encryption
to provide higher security for communication between the SNMP NMS and SNMP agent
through the portfolio of authentication, none authentication, encryption, and none
encryption. Authentication is for verifying whether the packet sender is legal, thus
avoiding illegal access. Encryption is for encrypting packets transmitted between the
NMS and agents, thus preventing interception.
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