Configuring an ECMP Load Balancing Mode for PPPoE Packets
Context
By default, CE12800 and the CE12800E that has the FD-X series cards installed process received PPPoE packets as common Ethernet packets. Figure 1-7 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. There are fewer variable fields of Layer 2 Ethernet frames of PPPoE packets and only source MAC addresses of packets from different users are different, so packets are often unevenly load balanced on an ECMP. To improve load balancing, use inner information of PPPoE packets for load balancing.
The CE12800E that has the ED-E/EG-E/EGA-E series cards installed can identify PPPoE packets and load balance the PPPoE packets without configuring ECMP load balancing.
Procedure
- (On the CE12800) Configure a load balancing mode for PPPoE packets.
- Run load-balance ecmp 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, PPPoE packets are load balanced based on src-mac, dst-mac, and vlan.
You can also specify session-id and l4-src-port to configure a load balancing mode for PPPoE packets based on the session ID and transport-layer source interface of the 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 ecmp pppoe { session-id | l4-src-port { ppp-address-compression | ppp-protocol-compression | both | none } }
- (On the CE12800E that has the FD-X series cards installed) Configure a load balancing mode for PPPoE packets.