HASH KEY
HASH KEY means that when the traffic chooses the specific egress port of the aggregation group, the chip calculates the KEY value used by the port via HASH. Generally speaking, different packet types support different HASH KEY values, and different switch chips support different HASH KEY values. The HASH KEY values supported by different packets are shown in Table 1-1.
Table 1-1 The HASH KEY values supported by different packet types and their meanings
|
HASH KEY Type
|
Description
|
|
dst-mac
|
Based on destination MAC address: Realize the aggregation load balance by the destination MAC address of the packet
|
|
src-mac
|
Based on source MAC address: Realize the aggregation load balance by the source MAC address of the packet
|
|
src-interface
|
Based on the receiving source interface: Realize the aggregation load balance by the receiving source interface of the packet
|
|
vlan
|
Based on VLAN: Realize the aggregation load balance by the VLAN of the packet
|
|
dst-ip
|
Based on destination IP address: Realize aggregation load balance by the destination IP address of the packet
|
| l4-dst-port |
Based on L4 destination port number: Realize aggregation load balance by the L4 destination port number of the packet |
| flow-label |
Based on IPv6 flow label: Realize the aggregation load balance by the IPv6 flow label of the packet |
| protocol |
Based on IP protocol: Realize the aggregation load balance by the IP protocol of the packet |
| src-ip |
Based on source IP address: Realize aggregation load balance by the source IP address of the packet |
| l4-src-port |
Based on L4 source port number: Realize aggregation load balance by the L4 source port number of the packet |
| Top-lable |
Realize the load balance based on mpls packet header label |
| 2nd -lable |
Realize the load balance based on mpls packet L2 label |
| 3rd-lable |
Realize the load balance based on mpls packet L3 label |
In the local device, the HASH KEY values supported by different packets are shown in the following table:
Table 1-2 The HASH KEY values supported by different packets
|
Packet Type
|
Supported HASH KEY
|
|
L2 known unicast packet
|
dst-mac, src-mac, src-interface, vlan
|
|
L3 known unicast packet
|
dst-ip, l4-dst-port, flow-label, protocol, src- ip, l4-src-port, src-interface
|
|
Other L2 packets
|
dst-mac, src-mac, src-interface
|
|
Other L3 (IPv4/IPv6) packets
|
dst-ip, src-ip, src-interface
|
|
Mpls packet
|
Src-ip, dst-ip, top-lable, 2nd -lable, 3rd- lable
|
-
The HASH KEY of L2 known unicast packet can support combination of one or more HASH KEYs.
- The HASH KEY of L3 known unicast packet can support combination of one or more HASH KEYs.
- The HASH KEY values of other L2 packets are fixed, and cannot be configured, fixed to use dst-mac, src-mac, src-interface to perform the load balance.
- The HASH KEY values of other L3 (IPv4/IPv6) packets are fixed, and cannot be configured, fixed to use dst-mac, src-mac, src-interface to perform the load balance.
Switch
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