network management

The administrator

tracks of the interface of errors how many packets

that provides the interconnection between managing systems and the managed systems

the traffic of subscribers and end users

no user traffic on this

• Advantages
• –Reliability
• –Interference avoidance
• –Ease of network planning
• –Security
• •Disadvantages
• –Cost and overhead
• –No reasonable alternative (DSL
• line, for example)

is that the staff or someone else looking at the network

what users are doing

• The place from which large networks are managed
• May or may not house the communications
• equipment itself

• Seeing too many errors on an interface
• Pc might be sending out bad frames

You will not always see what some one else will see on their comps

• bidirectionaltraffic is mirrored from source Gigabit Ethernet port 1 to destination GigabitEthernet port 2, retaining the encapsulation method.
• Switch(config)# monitor session 1 source interface gigabitethernet0/1
• Switch(config)# monitor session 1 destination interface gigabitethernet0/2 encapsulation replicate

• supports source ports, source VLANs, and destination ports on different switches, enabling remote monitoring of multiple switches across your network.
• The RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over trunk ports

• shows how to create
• RSPAN VLAN 901.
• –Switch(config)# vlan 901
• –Switch(config-vlan)# remote span
• –Switch(config-vlan)# end
• My switch and any one associated with
• that route

• remove any existing RSPAN configuration for session 1, configure RSPAN session 1 to monitor multiple source interfaces, and configure the destination as RSPAN VLAN
• 901.
• –Switch(config)# no monitor session 1
• –Switch(config)# monitor session 1 source interface gigabitethernet0/1 tx
• –Switch(config)# monitor session 1 source interface gigabitethernet0/2 rx
• Switch(config)# monitor session 1 source interface port-channel 2
• Switch(config)# monitor session 1 destination remote vlan 901
• –Switch(config)# end

• Free Protocol Analyzer
• Collects packets as they pass by your NIC
• Can collect everything

only collect items that match particular criteria

is a LAN tool

• You will see all the traffic to and from the port
• The user cannot detect it

• and, or
• Both tests must be TRUE for the result to be TRUE and the packet to be kept
• or
• If either test is TRUE, the result is TRUE and the packet will be kept