HP Integrity rx2800 - i2 White Paper page 63

Table 4-10 Load Balancing based on Destination IP Address (four- and five-port teams) (continued)
000
001
010
011
100
101
110
111
If the Destination IP Address algorithm is chosen, and the frame doesn't have an IP header, the
frame is load balanced by destination MAC address (refer to
Method" below).
Scenario 4-C: A TLB Team Using IP Address-Based Load Balancing
Using the concepts reviewed in
2 Network" in Appendix A and
load-balancing functions.
Beginning at the point in Scenario A-2 where Blue/2.2.2.1 transmits the ping reply to Red/1.1.1.1,
Blue must decide whether to use network port B or E. Blue's teaming driver calculates using the
IP address of Red (1.1.1.1) because Red is the frame's destination. Because a dotted decimal 1.1.1.1
is equal to 0000 0001 . 0000 0001 . 0000 0001 . 0000 0001 in binary, and the last three bits (001) are
used to determine the transmitting network port (refer to
assigned to network port 2 (or the Non-Primary port). Therefore, when communicating with
Red, Blue will always use the Non-Primary port to transmit frames.
If Blue transmits a frame to Yellow, the same calculation must be made. Yellow's IP address in
dotted decimal is 1.1.1.4 and equal to 0000 0001 . 0000 0001 . 0000 0001 . 0000 0100 in binary.
Blue's teaming driver will again use the last three bits to determine which network port will
transmit the frame. Referring to
the Primary port). Therefore, when communicating with Yellow, Blue will always use the Primary
port to transmit frames.
It is important to note that if an implementer uses the MAC address load balancing algorithm
for the network in Figure
be load balanced using all teamed ports. Because Blue transmits all frames destined for Red and
Yellow via Green (Blue's gateway), Blue uses Green's Layer 2 address (MAC) as the frame's
Destination MAC Address but uses Red's and Yellow's Layer 3 addresses (IP) as the frame's
Destination IP Address. Blue never transmits frames directly to Red's or Yellow's MAC address
because Blue is on a different Layer 2 network. Because Blue always transmits to Red and Yellow
using Green's MAC address, the teaming driver will assign all conversations with clients on
Network 1.0.0.0 to the same network port. When an HP Integrity Network adapter team needs
to load balance traffic that traverses a Layer 3 device (router), at a minimum IP address-based
load balancing should be used. Ideally, Automatic should be used.
network port 1
network port 2
network port 3
network port 4
network port 1
network port 2
network port 3
network port 4
"Scenario A-2: One Device Pings Another on a Different Layer
Figure A-2, this section describes how TLB IP addressed- based
Table 4-9 – Two-port team, 100 is assigned to network port 1 (or
4-15, load balancing will not function as expected, and traffic will not
000
001
010
011
100
101
110
111
"TLB Destination MAC Address
Table 4-9 – Two-port team), 001 is
Types of HP Integrity Network Adapter Teams
network port 1
network port 2
network port 3
network port 4
network port 5
network port 1
network port 2
network port 3
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