D-Link DGS-6600 Series Hardware Installation Manual page 13

DGS-6600 Layer 3 Chassis Ethernet Managed Switch Hardware Installation Guide
The DGS-6604 includes several features that ensure physical resilience, including multiple
redundant power supplies and the capability of hot-swapping line cards or modules in the event of a
fault.
• Secure Switch Management Methods
The DGS-6604 supports several features to prevent non-administrators from logging into the Switch
and potentially causing disruption to the network. These features include the Secure Shell (SSH)
encrypted login function and the option of restricting Telnet and web access to a specific group of
source IP addresses.
• Support for 802.1X
The DGS-6604 supports 802.1X. 802.1X is a mechanism that is designed to only allow authorized
users, or other network devices, access to network resources by establishing criteria for each port
on the Switch that a user or network device must meet before allowing that port to forward or receive
frames.
• Support for a Wide Range of Applications
The DGS-6604 supports a wide range of applications including QoS and multicast.
The QoS techniques supported by the Switch include Strict Priority Mode, Weighted Round Robin
(WRR), Deficit Round Robin (DRR), and Head of Line (HOL) blocking. These QoS techniques help
to provide bandwidth assurance for the various applications.
The multiple multicast support techniques supported by the Switch include IGMP snooping, IGMP,
PIM (SM,DM), and DVMRP. These multicast support techniques ensure that the minimum
bandwidth required for multicast applications is provided on the network.
• Support for Equal-Cost Multipath Routing (ECMP)
When traditional routing techniques are used on a network that has multiple links that can reach the
same address, packets can only take one of the links to reach their destination, with all other links
being in standby or inactive. Another issue with traditional routing techniques is that the switching
between the various links can take some time in an environment that is using dynamic routing.
Compared to traditional routing techniques, ECMP is a great improvement as it can use multiple
links at the same time in a resilient network environment. As well as increasing transmission
bandwidth, ECMP also backs up the data transmission on the link that has failed without causing
any delays or packet loss.
• STP and VRRP Support
The DGS-6604 supports both the Spanning-Tree Protocol (STP) and Virtual Router Redundancy
Protocol (VRRP). The Spanning-Tree Protocol (STP) versions supported by the Switch include
Spanning-Tree Protocol (IEEE 802.1D), Rapid Spanning-Tree Protocol (IEEE 802.1w), and Multiple
Spanning-Tree Protocol (IEEE 802.1s).
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