Dell PowerEdge MX7000 EMC OpenManage Enterprise-Modular Edition Version 1.00.1 - Page 68

Upstream network switch requirements, Spanning Tree Protocol

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For the MX5108n, ports 9 and 10 are used. Port 10 operates at 40GbE instead of 100GbE because all VLT links must run at the same speed. Ensure that you use a cable or optic fibre that supports 40GbE. NOTE: You cannot select the ports, and the connection topology is enforced by SmartFabric Services. NOTE: VLT is supported only on Ethernet and not on FCoE. Physically separate uplinks for LAN and FCoE traffic are required for MX5108n and MX9116n switches. Upstream network switch requirements It is recommended, but not required, that PowerEdge MX switches are connected to a pair of redundant upstream switches. While connecting a pair of switches in Fabric mode to an upstream switch pair, the upstream switch pair must be configured in the following way: 1 Both upstream switches must be connected to each other using technologies such as VLT or VPC. 2 The upstream switch ports must be in a port-channel using LACP. NOTE: The LACP option is supported on Ethernet uplinks only. 3 Ensure that a compatible Spanning Tree Protocol is configured. For more information, see the section, Spanning Tree Protocol. Spanning Tree Protocol OS10 defaults to RPVST+ as the Spanning Tree protocol. To change STP modes, use the spanning-tree mode command. See the OS10 User Guide for exact steps. Use the spanning-tree mode command to change STP modes. For steps, see the OS10 Enterprise Edition User Guide. NOTE: If the upstream network is running RSTP, change from RPVST+ to RSTP before physically connecting the switches to the upstream network. Failure to do so may cause a network outage. 68 SmartFabric Services

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For the MX5108n, ports 9 and 10 are used. Port 10 operates at 40GbE instead of 100GbE because all VLT links must run at the same speed.
Ensure that you use a cable or optic
fibre
that supports 40GbE.
NOTE:
You cannot select the ports, and the connection topology is enforced by SmartFabric Services.
NOTE:
VLT is supported only on Ethernet and not on FCoE. Physically separate uplinks for LAN and FCoE
traffic
are required for
MX5108n and MX9116n switches.
Upstream network switch requirements
It is recommended, but not required, that PowerEdge MX switches are connected to a pair of redundant upstream switches. While
connecting a pair of switches in Fabric mode to an upstream switch pair, the upstream switch pair
must
be
configured
in the following way:
1
Both upstream switches must be connected to each other using technologies such as VLT or VPC.
2
The upstream switch ports must be in a port-channel using LACP.
NOTE:
The LACP option is supported on Ethernet uplinks only.
3
Ensure that a compatible Spanning Tree Protocol is
configured.
For more information, see the section,
Spanning Tree Protocol
.
Spanning Tree Protocol
OS10 defaults to RPVST+ as the Spanning Tree protocol. To change STP modes, use the spanning-tree mode command. See the OS10
User Guide for exact steps. Use the spanning-tree mode command to change STP modes. For steps, see the
OS10 Enterprise Edition User
Guide
.
NOTE:
If the upstream network is running RSTP, change from RPVST+ to RSTP before physically connecting the switches to the
upstream network. Failure to do so may cause a network outage.
68
SmartFabric Services