hello world,
I'm designing an infrastructure that is be able to support very high network
traffic between 2 machines, which must be connected via switches. 2 switches
are required (likely Cicso 2960, but open to others) for active-active.
The traffic is bi-directional. So X4600 will send & receive via both switches
to X4200, and vice versa. So it has to handle inbound and outbound traffic.
The connectivity is shown below. Dual line means dual physical ethernet cables.
|------- Switch A -------|
| |
| |
X4600 === === X4200 |
|
| |
|------- Switch B -------|
Kindly advice:
1. Is it possible to combine/aggregate the 2 ports as active-active?
Specifically, if we send 1 MB file, will it go thru both?
2. When a link fails in the middle of sending, will the fail-over be
transparent?
Looking at Solaris 10 11/06 manuals, the command to use is dladm (1M). Page 142
states the following:
If you plan to use a link aggregation, consider defining a policy for outgoing
traffic. This policy
specifies how you want packets to be distributed across the available links of
an aggregation, thus
establishing load balancing. The following are the possible layer specifiers
and their significance for
the aggregation policy:
L2 - Determines the outgoing link by hashing theMAC(L2) header of each packet
L3 - Determines the outgoing link by hashing the IP (L3) header of each packet
L4 - Determines the outgoing link by hashing the TCP, UDP, or other ULP (L4)
header of each packet
Any combination of these policies is also valid.
Based on the above, will the hashing result in constant route (always Switch A
or Switch B, but never load balance)?
thank you from Singapore
e1
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