Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide ...

LACP trunking 4Trunk formation rulesWhen troubleshooting trunks, make sure the following rules for trunk formation have beenconsidered:• Any number of ports between 2 and 20 within the same chassis can be used to configure atrunk port.• Use the server trunk option when configuring a trunk group that connects to VPLS or VirtualLease Line (VLL) endpoints.• Ports in a trunk must have the same speed, negotiation mode, and Quality of Service (QoS)priority or the trunk is rejected.• All ports configured in a trunk must be configured with the same port attributes.• Primary port policy applies to all secondary ports. No trunk is rejected.• The trunk is rejected if any trunk port has mirroring or monitoring configured.• The trunk is rejected if any trunk port has VLAN or inner-VLAN translation configured.Layer 2 requirementsThe trunk is rejected if the trunk ports:• Do not have the same untagged VLAN component.• Do not share the same SuperSpan Customer ID (CID).• Do not share the same VLAN membership.• Do not share the same uplink VLAN membership.• Do not share the same protocol-VLAN configuration.• Are configured as primary and secondary interfaces.Layer 3 requirementsThe trunk is rejected if any secondary trunk port has any Layer 3 configurations, such as IPv4 orIPv6 addresses, OSPF, RIP, RIPng, IS-IS, and so on.Layer 4 (ACL) requirementsAll trunk ports must have the same ACL configurations or the trunk is rejected. You can have amaximum of 128 server trunks and 80 switch trunks.NOTEThese trunking rules are applicable for statically configured trunks as well as dynamic trunkscreated using LACP.Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide 9553-1002426-02