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10G Core Routing Switch User Manual
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Step 3
ip access-list
access-list-number
in
Control access to the specified interface.
Step 4
exit
Return to global configuration mode.
Step 5
show
access-list
access-list-number
Verify your entries.
Step 6
Copy
running-config
startup-config
(Optional) Save your entries in the configuration file.
To remove the specified access group, use the
no
ip access-list
access-list-number
in
interface configuration command.
This example shows how to apply access list 2 to a port to filter packets entering the port:
Switch(config)#
interface gigabitethernet1/1
Switch(config-if)#
ip access-list 2 in
SNMP Configuration
SNMP Overview
By far, the Simple Network Management Protocol (SNMP) has gained the most extensive application in the computer
networks. SNMP has been put into use and widely accepted as an industry standard in practice. It is used for ensuring
the transmission of the management information between any two nodes. In this way,network administrators can
easily search and modify the information on any node on the network. In the meantime, they can locate faults
promptly and implement the fault diagnosis, capacity planning and report generating. SNMP adopts the polling
mechanism and provides the most basic function set. It is most applicable to the small-sized, fast-speed and low-cost
environment. It only requires the unverified transport layer protocol UDP; and is thus widely supported by many other
products.
In terms of structure, SNMP can be divided into two parts, namely, Network Management Station and Agent. Network
Management Station is the workstation for running the client program. At present, the commonly used NM platforms
include Sun NetManager and IBM NetView. Agent is the server software operated on network devices. Network
Management Station can send GetRequest, GetNextRequest and SetRequest messages to the Agent. Upon receiving
the requests from the Network Management Station, Agent will perform Read or Write operation according to the
message types, generate and return the Response message to Network Management Station. On the other hand,
Agent will send Trap message on its own initiative to the Network Management Station to report the events whenever
the device encounters any abnormalities such as new device found and restart
.
SNMP Versions and Supported MIB
To uniquely identify the management variables of a device in SNMP messages, SNMP adopts the hierarchical naming
scheme to identify the managed objects. It is like a tree.A tree node represents a managed object, as shown in the
figure below. Thus the object can be identified with the unique path starting from the root.