Dell ECS EX Series User Manual

Figure 6. Front-end switch connections to customer switches (example)
Dell EMC S5248F switch
NOTE:
The EXF900 appliance use the Dell EMC S5248F for the front-end pair of switches and for the pair of back-end
switches. Customers have the option of using their own front-end switches instead of the Dell EMC S5248F switches. The
Dell EMC S5248F switches are required for the back-end pair.
Figure 7. Dell EMC S5248F switch ports
Front-end switch pair
Dell EMC offers an optional HA pair of front-end 25 GbE S5248F switches for customer network connection to the rack. It has
two 200 GbE (QSFP28-DD) virtual link trunking (VLT) cables per HA pair. These switches are called the Hare (FE2) and the
Rabbit (FE1) switches.
The S5248F does not auto negotiate based on optic type or cable type. ECS has created specific uplink ports for 10GbE and
25GbE customer networks. ECS has also created specific configuration files to configure ports 53-56 as 40GbE or 100GbE for
customer uplink. Refer to table below for port breakout for each personality.
Customers can use their own front-end switch pair (25 GbE for EXF900). In this case, the customer must provide the
appropriate switches, VLT cables, SFPs, or external connection cables.
CAUTION:
It is required to have connections from the customer's network to both front-end switches (rabbit
and hare) in order to maintain the high availability architecture of the ECS appliance. If the customer chooses
Switches 17

Dell ECS EX Series Specifications

General

Brand	Dell
Model	ECS EX Series
Category	Server
Language	English