D-Link DGS-6600-48T Product Manual - Page 85

DGS-6604 bgp deterministic-med bgp deterministic-med Use this command to include the Multi Exit Discriminator (MED) value for comparison of the best path selection between all paths received from the same autonomous system. Use the no form of the command to prevent BGP from considering the MED attribute in path comparison. bgp deterministic-med no bgp deterministic-med Syntax None Default Command Mode The default value is disabled. Router configuration Usage Guideline The bgp always-compare-med command on page 67 is used to enable the comparison of the MED value for paths from neighbors in different autonomous systems. After the bgp always-compare-med is enabled, all paths for the same prefix that are received from different neighbors in the same autonomous system, will be grouped together and sorted by the ascending MED value (received-only paths are ignored and not grouped or sorted). The best path selection algorithm then picks the best paths using the existing rules; the comparison is first made on a per neighbor autonomous system basis and then on a global basis. The grouping and sorting of paths occurs immediately after this command is entered. For correct results, all routers in the local autonomous system must have this command enabled (or disabled). Example The bgp deterministic-med command is used to enforce deterministic comparison of the MED value between all paths received from within the same autonomous system. When enabled, the result of the selection algorithm is the same regardless of the order in which the paths are received on the local router. This example shows how to configure to enable comparison of MED values for autonomous system 65534: Switch(config)# router bgp 65534 Switch(config-router)# bgp deterministic-med CLI Reference Guide 75