Brocade Network OS NETCONF Operations Guide v4.1.1 - Manual (Page 126)

94 Network OS NETCONF Operations Guide
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Fabric interface configuration management
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If you wish to rebind this virtual IP address to this management interface, remove the currently
configured virtual IP address and reconfigure it. This situation can arise when the virtual IP address
was not bound to the management interface of the principal switch due to duplicate address
detection.
A separate gateway cannot be configured for the virtual IP address. The default gateway is the
same as the gateway address for the management port of the same switch.
Virtual IP address configuration scenarios
A virtual IP address may be assigned to a switch whenever it is the principal switch in the cluster.
Refer to the Network OS Administrator’s Guide for a list and explanation of the configuration
scenarios that may occur.
Fabric ECMP load balancing
Traffic towards ECMP paths is load-balanced using the following eight fields as the Key; VLAN ID,
MAC DA, MAC SA, L3_ULP, L3 DA, L3 SA, L4 Dst, and L4 Src. For some pattern of streams, most of
the traffic falls into one ECMP path, and the rest of the ECMP paths are underutilized. This
situation can result in loss of data traffic, even though more ECMP paths are available to offload
the traffic. You can configure the ECMP path selection method within the fabric by configuring the
element in node, located in the
urn:brocade.com:mgmt:brocade-fabric-service namespace.
Table 3 list the values you can use.
Additionally, you can choose to swap adjacent bits of the hash key. This action is useful in cases
where a choice of any of the hash key combinations causes the distribution of traffic to not be
uniform.
The element in the node of the
urn:brocade.com:mgmt:brocade-fabric-service namespace is used to configure the swapping of the
input fields before feeding them to the hash function. The integer is interpreted as a bitwise control
of the 212-bit key. Each bit controls whether the two adjacent bits of the key are to be swapped.
This 32-bit control value is written to all four hash swap control registers. This value is replicated in
32-bit block to form a 106-bit value. A value of 0 does not swap any input fields while a value of
4294967295 (hexadecimal ffffffff) swaps all 106 input bit-pairs.
To configure the ECMP load balancing feature, perform the following steps.
TABLE 3 ECMP load balancing operands
Operand Description
dst-mac-vid Destination MAC address and VID-based load balancing
src-dst-ip Source and Destination IP address-based load balancing
src-dst-ip-mac-vid Source and Destination IP, MAC address, and VID-based load balancing
src-dst-ip-mac-vid-port Source and Destination IP, MAC address, VID, and TCP/UDP port based
load balancing
src-dst-ip-port Source and Destination IP and TCP/UDP port-based load balancing
src-dst-mac-vid Source and Destination MAC address and VID-based load balancing
src-mac-vid Source MAC address and VID-based load balancing