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Table of Contents
- 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 Notification
- 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 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
list Table of Contents
Adjusting the ARP Aging Timer
date_range
20-Dec-24
By default, the ARP aging timer is set at 20 minutes. In environments with many directly attached hosts, such as metro Ethernet environments, increasing the amount of time between ARP updates by configuring the ARP aging timer can improve performance in an event where having thousands of clients time out at the same time might impact packet forwarding performance. In environments where there are devices connected with lower ARP aging timers (less than 20 minutes), decreasing the ARP aging timer can improve performance by preventing the flooding of traffic toward next hops with expired ARP entries. In most environments, the default ARP aging timer value does not need to be adjusted.
To configure the system-wide ARP aging timer, include the aging-timer statement at the [edit system arp] hierarchy
level:
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[edit system arp] user@host# aging-timer minutes
The aging timer range is from 1 through 240 minutes. The timer value you configure takes effect as ARP entries expire. In other words, each subsequent refreshed ARP entry receives the new timer value. The new timer value does not apply to ARP entries that exist at the time you commit the configuration.
For more information about statements you can configure at the [edit system]
hierarchy level, see the CLI User Guide for Junos OS.
