Operation Manual – Link AggregationH3C S5500-EI Series Ethernet Switches Chapter 1 Link Aggregation Overview1-6forwarding port according to the source MAC address and destination MACaddress.z For a unicast IP packet with a known destination IP address, the switch selects theforwarding port according to the source IP address and the destination IP addressof the packet.z For a Layer-2 multicast packet with a known destination MAC address, the switchselects the forwarding port according to the source MAC address, the destinationMAC address, and the receiving port of the packet.z For a Layer-3 multicast packet with a known IP address, the switch selects theforwarding port according to the source IP address, the destination IP address,and the receiving port of the packet.z For an unknown unicast/multicast/broadcast packet, the switch selects theforwarding port according to the source MAC address, the destination MACaddress, and the receiving port of the packet.Note:When only one selected port remains in a load sharing aggregation group, the groupkeeps working in the load sharing mode.1.4 Service Loop GroupYou can create a service loop group by creating a manual aggregation group ofservice-loop ports first and then specifying which services can be redirected for thegroup. At present, you may specify to redirect four types of services, IPv6 (IPv6 unicast),IPv6mc (IPv6 multicast), tunnel, and MPLS.Note:Currently, the S5500-EI series Ethernet switches support to redirect tunnel servicesonly.After creating a service-loop group, assign ports that support its service type to thegroup considering the following:z These ports can be configured only with the physical configuration such as speedand duplex mode, QoS, and ACL. Other conflicting configurations, such as STPcannot be configured.z These ports must belong to VLAN 1.
