3V0-42.20 Exam Dumps : Advanced Design VMware NSX-T Data Center

Top of Rack Physical Switches

When configuring top of rack (ToR) switches, consider the following best practices:

- Configure redundant physical switches to enhance availability.

- Configure switch ports that connect to ESXi hosts manually as trunk ports. Virtual switches

are passive devices and do not support trunking protocols, such as Dynamic Trunking

Protocol (DTP).

- Modify the Spanning Tree Protocol (STP) on any port that is connected to an ESXi NIC to

reduce the time to transition ports over to the forwarding state, for example using the Trunk

PortFast feature found in a Cisco physical switch.

- Provide DHCP or DHCP Helper capabilities on all VLANs used by TEP VMkernel ports. This

setup simplifies the configuration by using DHCP to assign IP address based on the IP subnet

in use.

- Configure jumbo frames on all switch ports, inter-switch link (ISL), and switched virtual

interfaces (SVIs).

As mentioned, using Federation for five sites is not possible yet. Therefore, we have to setup L2VPN. IPSec (needed by L2VPN) can be established from T0 as well as T1 (the same rule applies to L2VPN). However, L2VPN is limited (server or client) to one service per gateway, therefore it's not possible to utilize five L2VPN tunnels from the same T0 and we have to deploy five T1s.