D-Link DGS-3627G Product Manual - Page 207

xStack® DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch ECMP Algorithm Settings ECMP algorithm settings allow the user to set the ECMP load balance algorithm which makes it effective for ECMP routing. ECMP routing can be adopted by either OSPF dynamic routes or by static routes which are configured with equal cost. The OSPF protocol maintains multiple equal-cost routes to all destinations. Each one of the multiple routes will be of the same type (intraarea, inter-area, type 1 external or type 2 external), cost, and will have the same associated area. However, each route may specify a separate next hop and Advertising router. There is no requirement that a router running OSPF can keep track of all possible equal-cost routes to a destination. An implementation may choose to keep only a fixed number of routes to any given destination. This does not affect any of the algorithms presented in this specification. To configure these settings, click L3 Features > ECMP Algorithm Settings, as shown below: Figure 4- 26. ECMP Algorithm Settings window The following settings can be configured: Parameter Description ECMP OSPF State Use the drop-down menu to enable or disable the ECMP OSPF State. Destination IP Tick this check box to include the Destination IP in the ECMP Algorithm. Source IP/CRC Low/CRC High Source IP - If set, ECMP algorithm will include the source IP. This attribution is mutually exclusive with CRC Low and CRC High. If it is set, CRC Low and CRC High will be excluded. It is not set by default. CRC Low - If set, ECMP algorithm will include the lower 5 bits of CRC. This attribution is mutually exclusive from CRC High and IP source. If it is set, CRC High and IP source will be excluded. It is set by default. CRC High - If set, ECMP algorithm will include the upper 5 bits of CRC. This attribution is mutually exclusive with IP source and CRC Low. If it is set, CRC Low and IP source will be excluded. It is not set by default. TCP/UDP Port Tick this check box to include TCP/UDP Port in the ECMP Algorithm. Click Apply to implement changes made. 191