Addendum

3. Before performing the planned reload, we recommend that the IPv6 Neighbor Discovery (ND)
reachable timer (amount of time that a switch can connect to a remote node after a reachability
confirmation event has taken place) is increased to a value of 300 seconds or longer on the adjacent
devices to prevent the ND cache entries from becoming stale and being removed while the ToR
goes through a CPU reset. This timer can be restored to its prior value after the ToR has completed
its planned reload.
4. BGP protocol on the adjacent devices responds to network (link-state) changes and route
advertisements quickly and propagate these further up the network quickly. You might need to
adjust the BGP timers on these devices.
5. Note that fastboot will operate even if some of the preceding conditions are not met. However, the
duration of traffic loss might be longer.
6. Warm boot is supported because it enables faster convergence and reduced traffic loss.
7. BGP graceful restart must be configured with GR time left to default (120 seconds) or higher. The
BGP hold timer to be configured with 10 seconds.
8. You must configure the LACP long timeout, which is the amount of time that a LAG interface waits
for a PDU from the remote system before bringing the LACP session down, to be higher than the
default value.
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 traffic
for all of the following traffic directions. These traffic patterns apply only to the S6000 platforms.
• South-North
• North-South
• East-West
• West-East
To the south of ToR, 96 servers can be linked. Up to 8 Multiprocotol BGP (MP-BGP) sessions to the
servers are established. You can configure a minimum of 2 MP-BGP sessions and a maximum of 8 MP-
BGP sessions.
To the north of the ToR switch, up to 8 leaf nodes are connected. Up to 8 EBGP sessions for IPv4 and
IPv6 for each leaf node are configured. LACP is enabled between the ToR and leaf nodes, and the LACP
long timer is set to the default value. You must configure 96 ports to be 10-Gigabit Ethernet interfaces
and 8 ports as 40-Gigabit ethernet interfaces. You must configure the switch to operate with an uplink
speed of 40 Gigabit Ethernet per second.
Interoperation of Applications with Fast Boot and System
States
This functionality is supported on the S6000 platform.
The S6000 switch contains a Complex Programmable Logic Device (CPLD) that supports individual
device resets in addition to the ability to reset the entire board. This is the underlying, principal capability
that the Fastboot functionality is built on. To enable this capability in a usert-initiated manner, you can
use the fastboot keyword with the reload-type command in Global Configuration mode in Dell
Networking OS Release 9.3.0.0 and later. If you enable the optimzied booting or fast boot functionality,
only the CPU is reset. The BIOS is first run, which causes the boot loader (GRUB) located in the Compact
Flash card to be started. GRUB loads and runs the appropriate OS image as specified in the boot
configuration. The switch will be reset and reinitialized only in the early stage of initialization of this OS
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Flex Hash and Optimized Boot-Up