Qtech QSW-2900-24T-AC [34/209] No cpu car

2-32

Tracing route to 192.168.1.2 [192.168.1.2]

over a maximum of 30 hops:

1 20 ms <10 ms <10 ms 192.168.0.1

1 20 ms <10 ms 30 ms 192.168.1.2

tracert complete.

2.4.8 cpu-car command

cpu-car is used to configure cpu rate for receiving packet. no cpu-car is used to restore to default cpu rate for

receiving packet. Configure it in global configuration mode:

cpu-car target-rate

no cpu-car

Parameter:

target-rate: cpu rate for receiving packet , which is in the range of 1 to 1000pps and the default rate is 50pps..

Example:

! Configure cpu rate for receiving packet to be 100pps

QTECH(config)#cpu-car 100

2.5 Monitor system by SNMP

2.5.1 Brief introduction of SNMP

SNMP(Simple Network Management Protocol)is an important network management protocol in TCP/IP

network. It realizes network management by exchanging information packets. SNMP protocol provides possibility of

concentrated management to large sized network. Its aim is guaranteeing packet transmission between any two points

to be convenient for network administrator to search information, modify and search fault, finish fault diagnosising,

capacity planning and creation reporting at any network node. It consists of NMS and Agent. NMS (Network

Management Station), is the working station of client program running, and Agent is server software running in

network devices. NMS can send GetRequest, GetNextRequest and SetRequest packet to Agent. After receiving

requirement packet of NMS, Agent will Read or Write management variable according to packet type and create

Response packet, and return it to NMS. On the other hand, the Trap packet of abnormity of cold boot or hot boot of

devices will send to NMS.

QTECH company is present it own QTECH NMS and Agent server. Please refer to the

http://www.qtech.ru/support/software.htm

System supports SNMP version of v1, v2c and v3. v1 provides simple authentication mechanism which does

not support the communication between administrator to administrator and v1 Trap does not possess authentication

mechanism. V2c strengthens management model (security), manages information structure, protocol operation, the

communications between managers, and it can create and delete table, and strengthen communication capacity of

managers, and reduce the storage operation of agency. V3 realizes user distinguishing mechanism and packet

encryption mechanism, and greatly improves security of SNMP protocol.

Simple Network Management Protocol (SNMP) offers a framework to monitor network devices through

TCP/IP protocol suite. It provides a set of basic operations in monitoring and maintaining the Internet and has the

following characteristics:

· Automatic network management: SNMP enables network administrators to search information, modify