enable ipforwarding
Description
Enables IPv4 routing or IPv4 broadcast forwarding for one or all VLANs. If no argument is provided, enables IPv4 routing for all VLANs that have been configured with an IP address on the current VR or VRF.
Syntax Description
ipv4 | Specifies IPv4 forwarding. |
broadcast | Specifies broadcast IP forwarding. |
vlan_name | Specifies a VLAN name. |
Default
Disabled.
Usage Guidelines
IP forwarding must first be enabled before IP broadcast forwarding can be enabled. When new IP interfaces are added, IP forwarding (and IP broadcast forwarding) is disabled by default. Currently, Extreme Networks switches only have a single hardware control per VLAN for IP forwarding of IPv4 and IPv6 unicast packets. Therefore, enabling IPv4 forwarding on a VLAN also enables IPv6 hardware forwarding on that VLAN. Future switches may have independent controls per-VLAN for forwarding of IPv4 and IPv6 unicast packets.
The broadcast, ignore-broadcast, and fast-directbroadcast options each prompt with a warning message when executed while the IP forwarding on the corresponding VLAN is disabled. The hardware and software are NOT programmed until IP forwarding is enabled on the VLAN.
The fast-direct-broadcast and ignore-broadcast options cannot be enabled simultaneously. These are mutually exclusive.
The broadcast option can be enabled in conjunction with fast-direct-broadcast and ignore-broadcast.
Example
The following command enables forwarding of IP traffic for all VLANs in the current VR context with IP addresses:
enable ipforwarding
The following command enables forwarding of IP broadcast traffic for a VLAN named accounting:
enable ipforwarding broadcast vlan accounting
History
This command was first available in ExtremeXOS 10.1.
The ipv4 keyword was added in ExtremeXOS 11.2.
The ignore-broadcast and the fast-direct-broadcast keywords were added in ExtremeXOS 12.0.
Platform Availability
This command is available on all platforms that use the Edge, Advanced Edge, or Core license. For information on the licenses available for each platform, see the Feature License Requirements document.