44 VLANs, Spanning Tree, and Static Link AggregationSingle port SMLTWith single port SMLT, you can configure a split multilink trunk using a singleport and scale the number of split multilink trunks on a switch to a maximumnumber of available ports. Single port SMLT behaves just like an MLT-basedSMLT and can coexist with SMLTs in the same system.Split MLT links can exist in the following combinations on the SMLTaggregation switch pair:• MLT-based SMLT + MLT-based SMLT• MLT-based SMLT + single port SMLT• single port SMLT + single port SMLTThe rules for configuring single port SMLT are the following:• The dual-homed device connecting to the aggregation switches must becapable of supporting MLT.• Single port SMLT is supported on Ethernet ports.• Each single port SMLT is assigned an SMLT ID from 1 to 512.• Single port SMLT ports can be designated as Access or Trunk (that is,IEEE 802.1Q tagged or not), and changing the type does not affecttheir behavior.• You cannot change a single port SMLT into an MLT-based SMLT byadding more ports. You must delete the single port SMLT, and thenreconfigure the port as SMLT/MLT.• You cannot change an MLT-based SMLT into a single port SMLT bydeleting all ports but one. You must first remove the SMLT/MLT and thenreconfigure the port as single port SMLT.• A port cannot be configured as MLT-based SMLT and as single portSMLT at the same time.Figure 13 "Single port SMLT example" (page 45) shows a configuration, inwhich both aggregation switches have single port SMLTs with the sameIDs. With this configuration, you can have as many single port SMLTs asthere are available ports on the switch.Nortel Ethernet Routing Switch 8300Configuration — VLANs, Spanning Tree, and Static Link Aggregation using Device ManagerNN46200-510 03.01 Standard4.0 27 August 2007Copyright © 2005-2007, Nortel Networks.
