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RSPAN Configuration Guidelines
•
All the SPAN configuration guidelines apply to RSPAN.
•
As RSPAN VLANs have special properties, you should reserve a few VLANs across your network for
use as RSPAN VLANs; do not assign access ports to these VLANs.
•
You can apply an output ACL to RSPAN traffic to selectively filter or monitor specific packets. Specify
these ACLs on the RSPAN VLAN in the RSPAN source switches.
•
For RSPAN configuration, you can distribute the source ports and the destination ports across multiple
switches in your network.
•
Access ports (including voice VLAN ports) on the RSPAN VLAN are put in the inactive state.
•
You can configure any VLAN as an RSPAN VLAN as long as these conditions are met:
◦
The same RSPAN VLAN is used for an RSPAN session in all the switches.
◦
All participating switches support RSPAN.
FSPAN and FRSPAN Configuration Guidelines
•
When at least one FSPAN ACL is attached, FSPAN is enabled.
•
When you attach at least one FSPAN ACL that is not empty to a SPAN session, and you have not
attached one or more of the other FSPAN ACLs (for instance, you have attached an IPv4 ACL that is
not empty, and have not attached IPv6 and MAC ACLs), FSPAN blocks the traffic that would have
been filtered by the unattached ACLs. Therefore, this traffic is not monitored.
How to Configure SPAN and RSPAN
Creating a Local SPAN Session
Beginning in privileged EXEC mode, follow these steps to create a SPAN session and specify the source
(monitored) ports or VLANs and the destination (monitoring) ports.
SUMMARY STEPS
1.
configure terminal
2.
no monitor session {session_number | all | local | remote}
3.
monitor session session_number source {interface interface-id | vlan vlan-id} [, | -] [both | rx | tx]
4.
monitor session session_number destination {interface interface-id [, | -] [encapsulation replicate]}
5.
end
Catalyst 2960-X Switch Network Management Configuration Guide, Cisco IOS Release 15.0(2)EX
78 OL-29044-01
Configuring SPAN and RSPAN
How to Configure SPAN and RSPAN
- Cisco IOS Release 15.0(2)EX 1
- CONTENTS 3
- Contents 4
- OL-29044-01 v 5
- OL-29044-01 vii 7
- Document Conventions 9
- Timesaver 10
- Related Documentation 11
- Command Modes 13
- Table 1: Command Mode Summary 14
- Using the Help System 15
- CLI Error Messages 16
- Configuration Logging 17
- Recalling Commands 18
- 12 OL-29044-01 24
- Finding Feature Information 25
- 14 OL-29044-01 26
- Configuration Service 27
- Event Service 28
- NameSpace Mapper 28
- DeviceID 29
- Hostname and DeviceID 29
- Cisco IOS CNS Agents 30
- Automated CNS Configuration 31
- Enabling the CNS Event Agent 32
- What to Do Next 33
- Before You Begin 34
- Refreshing DeviceIDs 40
- Monitoring CNS Configurations 43
- Additional References 44
- Information About CDP 45
- How to Configure CDP 46
- Disabling CDP 48
- Enabling CDP 49
- Disabling CDP on an Interface 50
- Enabling CDP on an Interface 51
- 42 OL-29044-01 54
- Protocol 55
- 44 OL-29044-01 56
- Prerequisites for SNMP 56
- OL-29044-01 45 57
- Restrictions for SNMP 58
- Information About SNMP 58
- SNMP Agent Functions 59
- SNMP Community Strings 59
- SNMP MIB Variables Access 59
- SNMP Notifications 60
- Default SNMP Configuration 61
- SNMP Configuration Guidelines 61
- How to Configure SNMP 62
- Configuring Community Strings 63
- 56 OL-29044-01 68
- OL-29044-01 57 69
- Monitoring SNMP Status 74
- SNMP Examples 75
- Management Protocol 76
- 66 OL-29044-01 78
- SPAN and RSPAN 80
- Remote SPAN 81
- 70 OL-29044-01 82
- SPAN Sessions 83
- Monitored Traffic 83
- Source Ports 84
- Source VLANs 85
- VLAN Filtering 85
- Destination Port 85
- RSPAN VLAN 86
- OL-29044-01 75 87
- Flow-Based SPAN 88
- Configuration Guidelines 89
- Creating a Local SPAN Session 90
- Specifying VLANs to Filter 94
- SUMMARY STEPS 100
- DETAILED STEPS 100
- Example: 101
- Configuring an FSPAN Session 103
- Configuring an FRSPAN Session 105
- Configuring SPAN and RSPAN 110
- 98 OL-29044-01 110
- OL-29044-01 IN-1 111
- IN-2 OL-29044-01 112
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