HP Cisco Nexus 5000 Cisco Nexus 5000 Series Switch CLI Software Configuration - Page 563

Chapter 40 Configuring Fibre Channel Routing Services and Protocols In-Order Delivery Send feedback to [email protected] This section includes the following topics: • About Reordering Network Frames, page 40-11 • About Reordering SAN Port Channel Frames, page 40-11 • About Enabling In-Order Delivery, page 40-12 • Enabling In-Order Delivery Globally, page 40-12 • Enabling In-Order Delivery for a VSAN, page 40-13 • Displaying the In-Order Delivery Status, page 40-13 • Configuring the Drop Latency Time, page 40-13 • Displaying Latency Information, page 40-14 About Reordering Network Frames When you experience a route change in the network, the new selected path may be faster or less congested than the old route. Figure 40-4 Route Change Delivery Switch 1 Switch 2 Switch 3 Frame 2 Frame 1 Old path New path 85474 Frame 4 Frame 3 Switch 4 In Figure 40-4, the new path from Switch 1 to Switch 4 is faster. In this scenario, Frame 3 and Frame 4 may be delivered before Frame 1 and Frame 2. If the in-order guarantee feature is enabled, the frames within the network are delivered as follows: • Frames in the network are delivered in the order in which they are transmitted. • Frames that cannot be delivered in order within the network latency drop period are dropped inside the network. About Reordering SAN Port Channel Frames When a link change occurs in a SAN port channel, the frames for the same exchange or the same flow can switch from one path to another faster path. OL-16597-01 Cisco Nexus 5000 Series Switch CLI Software Configuration Guide 40-11