Supported Platforms
Related Documentation
- EX Series, QFX Series standalone switches
- Configuring Unknown Unicast Forwarding (CLI Procedure)
Verifying That Unknown Unicast Packets Are Forwarded to a Single Interface
Purpose
Verify that a VLAN is forwarding all unknown unicast packets (those with unknown destination MAC addresses) to a single interface instead of flooding unknown unicast packets across all interfaces that are members of the same VLAN.
 | Note: This example uses Junos OS for EX Series switches with support for the Enhanced Layer 2 Software (ELS) configuration style. If your switch runs software that does not support ELS, See: Verifying That Unknown Unicast Packets Are Forwarded to a Trunk Interface. For ELS details see: Getting Started with Enhanced Layer 2 Software. |
Action
Display the forwarding interface for unknown unicast packets for a VLAN (here, the VLAN name is v1):
user@switch> show configuration switch-options unknown-unicast-forwarding {
vlan v1 {
interface ge-0/0/7.0;
}
}
Meaning
The sample output from the show configuration switch-options command shows that the unknown unicast forwarding interface for VLAN v1 is interface ge-0/0/7. The show ethernet-switching table command shows that an unknown unicast packet is received on interface ge-0/0/3 with the destination MAC address (DMAC) 00:01:09:00:00:00 and the source MAC address (SMAC) of 00:11:09:00:01:00. This shows that the SMAC of the packet is learned in the normal way (through the interface ge-0/0/3.0), while the DMAC is learned on interface ge-0/0/7.
Related Documentation
- EX Series, QFX Series standalone switches
- Configuring Unknown Unicast Forwarding (CLI Procedure)
Published: 2014-04-24
Supported Platforms
Related Documentation
- EX Series, QFX Series standalone switches
- Configuring Unknown Unicast Forwarding (CLI Procedure)
