(Optional) Configuring an Eth-Trunk Load Balancing Mode for PPPoE Packets
Context
By default, a CE switch processes received PPPoE packets as common Ethernet packets. Figure 3-17 shows the format of PPPoE packets. The switch cannot identify the 5-tuple information in PPPoE packets and performs the hash algorithm based on the outer Ethernet frame of common Layer 2 packets by default. Fields in the Layer 2 frames of PPPoE packets are fixed except the source MAC address, so packets are often unevenly load balanced on an Eth-Trunk. To improve the load balancing effect, use inner information of PPPoE packets for load balancing.
The CE12800E with the ED-E/EG-E/EGA-E series cards installed can identify PPPoE packets and load balance the PPPoE packets without configuring Eth-Trunk load balancing.
Procedure
- Configure a load balancing mode for PPPoE packets on the CE12800 series switches.
- Run load-balance eth-trunk pppoe { session-id | l4-src-port { ppp-address-compression | ppp-protocol-compression | both | none } }
A load balancing mode is configured for PPPoE packets.
By default, the switch load balances PPPoE packets based on the source MAC address (smac), destination MAC address (dmac), and VLAN ID (vlan).
You can specify session-id and l4-src-port so that the switch load balances PPPoE packets based on the session ID and transport-layer source port of PPPoE packets.
Among all VSs in port mode, only the Admin-VS supports the load balancing mode configuration of PPPoE packets. All VSs in group mode can have a load balancing mode configured for PPPoE packets.
- Run load-balance eth-trunk pppoe { session-id | l4-src-port { ppp-address-compression | ppp-protocol-compression | both | none } }
- Configure a load balancing mode for PPPoE packets on CE12800E with the FD-X series cards installed.