Operation Manual – Link Aggregation
H3C S3610&S5510 Series Ethernet Switches
Chapter 1 Link Aggregation Overview
1-6
z
For a known Layer 2 unicast packet, the switch selects the forwarding port based
on the least significant six bits in the source MAC address and the least significant
six bits in the destination MAC address.
z
For a unicast IP packet with the destination MAC address being known, the switch
selects the forwarding port based on the lower order 6 bits in the source MAC
address, the lower order 6 bits in the destination MAC address, the lower order 6
bits in the source IP address, the lower order bits 16 through 21 in the source IP
address, the lower order 6 bits in the destination IP address, and the lower order
bits 16 through 21 in the destination IP address.
z
For a broadcast/multicast/unknown unicast packet, the switch selects the
forwarding port based on its VLAN ID, source port ID, and source device ID.
Caution:
The arrived broadcasts/multicasts/unknown unicasts may be distributed over different
selected ports if they have different VLAN IDs, source ports, or source devices; if they
are only different in source MAC address, they are forwarded out the same port.
1.4 Service Loop Group
You can create a service loop group by creating a manual aggregation group of
service-loop ports first and then specifying which services can be redirected for the
group. At present, you may specify to redirect four types of services, IPv6 (IPv6 unicast),
IPv6mc (IPv6 multicast), tunnel, and MPLS.
Note:
Currently, the S3610&S5510 series Ethernet switches support to redirect tunnel
services only.
After creating a service-loop group, assign ports that support its service type to the
group considering the following:
z
These ports can be configured only with the physical configuration such as speed
and duplex mode, QoS, and ACL. Other conflicting configurations, such as STP
cannot be configured.
z
These ports must belong to VLAN 1.
After assigning a port to a service-loop group, you may configure it with other
non-conflicting settings, such as QoS.
