- play_arrow Understanding Layer 2 Networking
- play_arrow Configuring MAC Addresses
- play_arrow Configuring MAC Learning
- play_arrow Configuring MAC Accounting
- play_arrow Configuring MAC Table Aging
- play_arrow Configuring Learning and Forwarding
- play_arrow Configuring Bridging and VLANs
- play_arrow Configuring 802.1Q VLANs
- 802.1Q VLANs Overview
- 802.1Q VLAN IDs and Ethernet Interface Types
- Configuring Dynamic 802.1Q VLANs
- Enabling VLAN Tagging
- Configuring Tagged Interface with multiple tagged vlans and native vlan
- Sending Untagged Traffic Without VLAN ID to Remote End
- Configuring Tag Protocol IDs (TPIDs) on QFX Series Switches
- Configuring Flexible VLAN Tagging on PTX Series Packet Transport Routers
- Configuring an MPLS-Based VLAN CCC with Pop, Push, and Swap and Control Passthrough
- Binding VLAN IDs to Logical Interfaces
- Associating VLAN IDs to VLAN Demux Interfaces
- Configuring VLAN and Extended VLAN Encapsulation
- Configuring a Layer 2 VPN Routing Instance on a VLAN-Bundled Logical Interface
- Example: Configuring a Layer 2 VPN Routing Instance on a VLAN-Bundled Logical Interface
- Specifying the Interface Over Which VPN Traffic Travels to the CE Router
- Configuring Access Mode on a Logical Interface
- Configuring a Logical Interface for Trunk Mode
- Configuring the VLAN ID List for a Trunk Interface
- Configuring a Trunk Interface on a Bridge Network
- Configuring a VLAN-Bundled Logical Interface to Support a Layer 2 VPN Routing Instance
- Configuring a VLAN-Bundled Logical Interface to Support a Layer 2 VPN Routing Instance
- Configuring a Layer 2 Circuit on a VLAN-Bundled Logical Interface
- Example: Configuring a Layer 2 Circuit on a VLAN-Bundled Logical Interface
- Guidelines for Configuring VLAN ID List-Bundled Logical Interfaces That Connect CCCs
- Specifying the Interface to Handle Traffic for a CCC
- Specifying the Interface to Handle Traffic for a CCC Connected to the Layer 2 Circuit
- play_arrow Configuring Static ARP Table Entries
- play_arrow Configuring Restricted and Unrestricted Proxy ARP
- play_arrow Configuring Gratuitous ARP
- play_arrow Adjusting the ARP Aging Timer
- play_arrow Configuring Tagged VLANs
- play_arrow Stacking and Rewriting Gigabit Ethernet VLAN Tags
- Stacking and Rewriting Gigabit Ethernet VLAN Tags Overview
- Stacking and Rewriting Gigabit Ethernet VLAN Tags
- Configuring Frames with Particular TPIDs to Be Processed as Tagged Frames
- Configuring Tag Protocol IDs (TPIDs) on PTX Series Packet Transport Routers
- Configuring Stacked VLAN Tagging
- Configuring Dual VLAN Tags
- Configuring Inner and Outer TPIDs and VLAN IDs
- Stacking a VLAN Tag
- Stacking Two VLAN Tags
- Removing a VLAN Tag
- Removing the Outer and Inner VLAN Tags
- Removing the Outer VLAN Tag and Rewriting the Inner VLAN Tag
- Rewriting the VLAN Tag on Tagged Frames
- Rewriting a VLAN Tag on Untagged Frames
- Rewriting a VLAN Tag and Adding a New Tag
- Rewriting the Inner and Outer VLAN Tags
- Examples: Stacking and Rewriting Gigabit Ethernet IQ VLAN Tags
- Understanding Transparent Tag Operations and IEEE 802.1p Inheritance
- Understanding swap-by-poppush
- Configuring IEEE 802.1p Inheritance push and swap from the Transparent Tag
- play_arrow Configuring Private VLANs
- Private VLANs
- Understanding Private VLANs
- Bridge Domains Setup in PVLANs on MX Series Routers
- Bridging Functions With PVLANs
- Flow of Frames on PVLAN Ports Overview
- Guidelines for Configuring PVLANs on MX Series Routers
- Configuring PVLANs on MX Series Routers in Enhanced LAN Mode
- Example: Configuring PVLANs with Secondary VLAN Trunk Ports and Promiscuous Access Ports on a QFX Series Switch
- IRB Interfaces in Private VLANs on MX Series Routers
- Guidelines for Configuring IRB Interfaces in PVLANs on MX Series Routers
- Forwarding of Packets Using IRB Interfaces in PVLANs
- Configuring IRB Interfaces in PVLAN Bridge Domains on MX Series Routers in Enhanced LAN Mode
- Example: Configuring an IRB Interface in a Private VLAN on a Single MX Series Router
- play_arrow Configuring Layer 2 Bridging Interfaces
- play_arrow Configuring Layer 2 Virtual Switch Instances
- play_arrow Configuring Link Layer Discovery Protocol
- play_arrow Configuring Layer 2 Protocol Tunneling
- play_arrow Configuring Virtual Routing Instances
- play_arrow Configuring Layer 3 Logical Interfaces
- play_arrow Configuring Routed VLAN Interfaces
- play_arrow Configuring Integrated Routing and Bridging
- play_arrow Configuring VLANS and VPLS Routing Instances
- play_arrow Configuring Multiple VLAN Registration Protocol (MVRP)
- play_arrow Configuring Ethernet Ring Protection Switching
- play_arrow Configuring Q-in-Q Tunneling and VLAN Translation
- play_arrow Configuring Redundant Trunk Groups
- play_arrow Configuring Proxy ARP
- play_arrow Configuring Layer 2 Interfaces on Security Devices
- play_arrow Configuring Security Zones and Security Policies on Security Devices
- play_arrow Configuring Ethernet Port Switching Modes on Security Devices
- play_arrow Configuring Ethernet Port VLANs in Switching Mode on Security Devices
- play_arrow Configuring Secure Wire on Security Devices
- play_arrow Configuring Reflective Relay on Switches
- play_arrow Configuring Edge Virtual Bridging
- play_arrow Troubleshooting Ethernet Switching
- play_arrow Configuration Statements and Operational Commands
MAC Notification
Understanding MAC Notification on EX Series Switches
Juniper Networks EX Series Switches track clients on a network by storing Media Access Control (MAC) addresses in the Ethernet switching table on the switch. When switches learn or unlearn a MAC address, SNMP notifications can be sent to the network management system at regular intervals to record the addition or removal of the MAC address. This process is known as MAC notification.
The MAC Notification MIB controls MAC notification for the network management system. For general information on the MAC Notification MIB, see the Junos OS Network Management Configuration Guide.
The MAC notification interval defines how often these SNMP notifications are sent to the network management system. The MAC notification interval works by tracking all of the MAC address additions or removals on the switch over a period of time and then sending all of the tracked MAC address additions or removals to the network management server at the end of the interval. For instance, if the MAC notification interval is set to 10, all of the MAC address addition and removal SNMP notifications are sent to the network management system every 10 seconds.
Enabling MAC notification allows users to monitor the addition and removal of MAC addresses from the Ethernet switching table remotely using a network management system. The advantage of setting a high MAC notification interval is that the amount of network traffic is reduced because updates are sent less frequently. The advantage of setting a low MAC notification interval is that the network management system is better synchronized with the switch.
MAC notification is disabled by default. When MAC notification is enabled, the default MAC notification interval is 30 seconds.
Configuring MAC Notification on Switches with ELS Support
This task uses the Enhanced Layer 2 Software (ELS) configuration style. If your switch runs software that does not support ELS, see Configuring Non-ELS MAC Notification or Configuring Non-ELS MAC Notification . For ELS details, see Using the Enhanced Layer 2 Software CLI.
When a switch learns or unlearns a MAC address, SNMP notifications can be sent to the network management system at regular intervals to record the addition or removal of the MAC address. This process is known as MAC notification.
The MAC notification interval defines how often Simple Network Management Protocol (SNMP) notifications logging the addition or removal of MAC addresses on the switch are sent to the network management system.
MAC notification is disabled by default. When MAC notification is enabled, the default MAC notification interval is 30 seconds.
To enable or disable MAC notification, or to set the MAC notification interval, perform these tasks:
Enabling MAC Notification
MAC notification is disabled by default. You need to perform this procedure to enable MAC notification.
To enable MAC notification on the switch with the default MAC notification interval of 30 seconds:
[edit switch-options]
user@switch# set mac-notification
To enable MAC notification on the switch with any other MAC notification interval (here, the MAC notification interval is set to 60 seconds):
[edit switch-options]
user@switch# set mac-notification notification-interval 60
Disabling MAC Notification
MAC notification is disabled by default. Perform this procedure only if MAC notification was previously enabled on your switch.
To disable MAC notification on the switch:
[edit switch-options]
user@switch# delete mac-notification
To disable MAC notification on a specific interface (here, the interface is ge-0/0/3):
[edit switch-options] user@switch# set interface ge-0/0/3 no-mac-notification
Setting the MAC Notification Interval
The default MAC notification interval is 30 seconds. The procedure to change the MAC notification interval to a different interval is identical to the procedure to enable MAC notification on the switch with a nondefault value for the MAC notification interval.
To set the MAC notification interval on the switch (here, the MAC notification interval is set to 5 seconds):
[edit switch-options]
user@switch# set mac-notification notification-interval 5
Configuring Non-ELS MAC Notification
This task uses Junos OS for EX Series switches that do not support Enhanced Layer 2 Software (ELS) configuration style. If your switch runs software that supports ELS, see Configuring MAC Notification on Switches with ELS Support. For ELS details, see Using the Enhanced Layer 2 Software CLI.
When a switch learns or unlearns a MAC address, SNMP notifications can be sent to the network management system at regular intervals to record the addition or removal of the MAC address. This process is known as MAC notification.
The MAC notification interval defines how often Simple Network Management Protocol (SNMP) notifications logging the addition or removal of MAC addresses on the switch are sent to the network management system.
MAC notification is disabled by default. When MAC notification is enabled, the default MAC notification interval is 30 seconds.
To enable or disable MAC notification, or to set the MAC notification interval, perform these tasks:
Enabling MAC Notification
MAC notification is disabled by default. You need to perform this procedure to enable MAC notification.
To enable MAC notification on the switch with the default MAC notification interval of 30 seconds:
[edit ethernet-switching-options]
user@switch# set mac-notification
To enable MAC notification on the switch with any other MAC notification interval (here, the MAC notification interval is set to 60 seconds):
[edit ethernet-switching-options]
user@switch# set mac-notification notification-interval 60
Disabling MAC Notification
MAC Notification is disabled by default. Perform this procedure only if MAC notification was previously enabled on your switch.
To disable MAC notification on the switch:
[edit ethernet-switching-options]
user@switch# delete mac-notification
Setting the MAC Notification Interval
The default MAC notification interval is 30 seconds. The procedure to change the MAC notification interval to a different interval is identical to the procedure to enable MAC notification on the switch with a nondefault value for the MAC notification interval.
To set the MAC notification interval on the switch (here, the MAC notification interval is set to 5 seconds):
[edit ethernet-switching-options]
user@switch# set mac-notification notification-interval 5
Verifying That MAC Notification Is Working Properly
Purpose
Verify that MAC notification is enabled or disabled, and that the MAC notification interval is set to the specified value.
Action
To verify that MAC notification is enabled or disabled on a QFX Series switch or an EX4600, and also to verify the MAC notification interval setting:
user@switch> show ethernet-switching mac-notification
Notification Status: Enabled
Notification Interval: 60
Notifications Sent : 0
Notifications Table Maxsize : 256The output in the Notification Status field shows that MAC notification is enabled. The output in the Notification Status field would display Disabled if MAC notification was disabled.
The Notification Interval field output shows that the MAC notification interval is set to 60 seconds.
To verify that MAC notification is enabled on an EX Series switch while also verifying the MAC notification interval setting:
user@switch> show ethernet-switching mac-notification
Notification Status: Enabled
Notification Interval: 30
The output in the Notification Status field shows that MAC notification is enabled. The output in the Notification Status field would display Disabled if MAC notification was disabled.
The Notification Interval field output shows that the MAC notification interval is set to 30 seconds.
