Configuring Reflective Relay
Configure reflective relay when a switch port must return packets on a downstream port. For example, configure reflective relay when a switch port receives aggregated virtual machine packets from a technology such as virtual Ethernet port aggregator (VEPA). When these packets are passed through the switch, reflective relay allows the switch to send those packets back on the same interface that was used for delivery.
 | Note: This task uses Junos OS for QFX3500 and QFX3600 switches that supports the Enhanced Layer 2 Software (ELS) configuration style. If your switch runs software that does not support ELS, see Configuring Reflective Relay. |
Before you begin configuring reflective relay, ensure that you have:
- Configured packet aggregation on the server connected to the port. See your server documentation.
- Configured the port for all VLANs that could be included in aggregated packets..
To configure reflective relay:
- Configure an Ethernet interface with an interface mode
of trunk:
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user@switch# set interfaces interface-name unit number family family-type interface-mode trunkFor example:
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user@switch# set interfaces xe-0/0/2 unit 0 family ethernet-switching interface-mode trunk - Configure the interface for reflective relay:
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user@switch# set interfaces interface-name unit number family family-type reflective-relayFor example:
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user@switch# set interfaces xe-0/0/2 unit 0 family ethernet-switching reflective-relay - Configure the interface for the VLANs that exist on the
VM server:
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user@switch# set interfaces interface-name unit number family family-type vlan members vlan-namesFor example:
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user@switch# set interfaces xe-0/0/2 unit 0 family ethernet-switching vlan members [VLAN_Purple VLAN_Orange VLAN_Blue]
