D-Link DGS-3324SR Product Manual - Page 321

xStack DGS/DXS-3300 Series Layer 3 Stackable Gigabit Ethernet Switch User Manual Section 11 D-Link Single IP Management Single IP Management (SIM) Overview Topology Firmware Upgrade Configuration Backup/Restore Single IP Management (SIM) Overview Simply put, D-Link Single IP Management is a concept that will stack switches together over Ethernet instead of using stacking ports or modules. There are some advantages in implementing the "Single IP Management" feature: 1. SIM can simplify management of small workgroups or wiring closets while scaling the network to handle increased bandwidth demand. 2. SIM can reduce the number of IP address needed in your network. 3. SIM can eliminate any specialized cables for stacking connectivity and remove the distance barriers that typically limit your topology options when using other stacking technology. Switches using D-Link Single IP Management (labeled here as SIM) must conform to the following rules: • SIM is an optional feature on the Switch and can easily be enabled or disabled through the Command Line Interface or Web Interface. SIM grouping has no effect on the normal operation of the Switch in the user's network. • There are three classifications for switches using SIM. The Commander Switch (CS), which is the master switch of the group, Member Switch (MS), which is a switch that is recognized by the CS a member of a SIM group, and a Candidate Switch (CaS), which is a Switch that has a physical link to the SIM group but has not been recognized by the CS as a member of the SIM group. • A SIM group can only have one Commander Switch (CS). • All switches in a particular SIM group must be in the same IP subnet (broadcast domain). Members of a SIM group cannot cross a router. • A SIM group accepts up to 32 switches (numbered 0-31), including the Commander Switch (numbered 0). • Ports linking switches within the SIM stack must be on the default VLAN. If the default VLAN is tagged, then each switch in the SIM stack must use the same VLAN ID (VID = 1) for the default VLAN. • A compatibility issue arises with SSH and SSL. Packets between a Commander Switch and a PC site can be protected through the use of SSH and SSL. However, packets between a CS and an MS cannot have SSH and SSL packets going back and forth between them. Therefore, the user must disable both of these security features when looking to add MSs to the CS, or the addition cannot take place. There is no limit to the number of SIM groups in the same IP subnet (broadcast domain), however a single switch can only belong to one group. If multiple VLANs are configured, the SIM group will only utilize the default VLAN on any switch. SIM allows intermediate devices that do not support SIM. This enables the user to manage switches that are more than one hop away from the CS. The SIM group is a group of switches that are managed as a single entity. Switches in the xStack DGS/DXS-3300 Series may take on three different roles: 1. Commander Switch (CS) - This is a switch that has been manually configured as the controlling device for a group, and takes on the following characteristics: • It has an IP Address. 306