9. Traffic from North-South and South-North nodes are of line rate type.10. Traffic outage for a planned reboot is less than 30 seconds for 4000 routes of IPv4 and IPv6 trafficfor all of the following traffic directions. These traffic patterns apply only to the S6000 platforms.• South-North• North-South• East-West• West-EastTo the south of ToR switch, 96 servers can be linked. Up to 8 Multiprocotol BGP (MP-BGP) sessions tothe servers are established. You can configure a minimum of 2 MP-BGP sessions and a maximum of 8MP-BGP sessions.To the north of the ToR switch, up to 8 leaf nodes are connected. Up to 8 EBGP sessions for IPv4 andIPv6 for each leaf node are configured. LACP is enabled between the ToR and leaf nodes, and the LACPlong timer is set to the default value. You must configure 96 ports to be 10-Gigabit Ethernet interfacesand 8 ports as 40-Gigabit Ethernet interfaces. You must configure the switch to operate with an uplinkspeed of 40 Gigabit Ethernet per second.Interoperation of Applications with Fast Boot and SystemStatesThis functionality is supported on the platform.The following sections describe the application behavior when fast boot functionality is enabled:LACP and IPv4 RoutingPrior to the system restart, the system implements the following changes when you perform a fast boot:The system saves all dynamic ARP entries to a database on the flash drive.A file is generated to indicate that the system is undergoing a fast boot, which is used after the systemcomes up.After the Dell Networking OS image is loaded and activated, and the appropriate software componentscome up, the following additional actions are performed:• If a database of dynamic ARP entries is present on the flash drive, that information is read and the ARPentries are restored; the entries are installed on the switch as soon as possible. At the same time, theentries are changed to an initial (“aged out”) state so that they are refreshed (and flushed if not learntagain). The database on the flash card is also deleted instantaneously.• The system ensures that local routes known to BGP are imported into BGP and advertised to peers asquickly as possible. In this process, any advertisement-interval configuration is not considered (onlyduring the initial period when the peer comes up).If you do not configure BGP GR, you must configure the peering with BGP keepalive and hold timers tobe as high as possible (depending on your network deployment and the scaled parameters or sessions) toenable the connection to be active until the system re-initializes the switch, causing the links to adjacentdevices to go down. If the BGP sessions are disabled before the re-initialization of the switch occurs332 Flex Hash and Optimized Boot-Up
