Sonic Impact Technologies NSA 2400MX Manual De Usuario
Configuring Switching
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SonicOS 5.7: Advanced Switching Feature Guide and Screencast Tutorial
Step 2
In the Edit RSTP Settings window, select the Enable RSTP checkbox to enable Rapid Spanning Tree
Protocol for this interface. Clear the checkbox to disable RSTP on this interface.
Protocol for this interface. Clear the checkbox to disable RSTP on this interface.
Step 3
To allow the path cost for the port to be automatically calculated by SonicOS, select the Auto checkbox.
The Auto option is enabled by default. If left in auto-mode, the port cost is determined based on link speed.
The Auto option is enabled by default. If left in auto-mode, the port cost is determined based on link speed.
Step 4
To specify the path cost for the port, type the desired cost value into the Port Path Cost field. You can
assign an arbitrary cost value or base the cost on guidelines provided by the RSTP or STP specification. The
cost is higher for lower bandwidth connections. According to guidelines, the cost of a 1 Gbps bandwidth
connection would be 2, compared to the cost of 19 for a 100 Mbps Fast Ethernet connection or 100 for a
10 Mbps connection.
assign an arbitrary cost value or base the cost on guidelines provided by the RSTP or STP specification. The
cost is higher for lower bandwidth connections. According to guidelines, the cost of a 1 Gbps bandwidth
connection would be 2, compared to the cost of 19 for a 100 Mbps Fast Ethernet connection or 100 for a
10 Mbps connection.
Step 5
To specify the port priority, type the desired priority into the Port Priority field. The port priority defaults
to the interface number unless configured otherwise. The range is 0 to 15. A lower number indicates higher
priority. Port priority is important when multiple ports are connected to the same switch and there is a
possible loop, or in the case where the cost of the path to the root bridge is the same as it is for another
port. The port with the lower number for port priority is used to forward traffic. The port with the lower
priority (indicated by a higher number) is blocked.
to the interface number unless configured otherwise. The range is 0 to 15. A lower number indicates higher
priority. Port priority is important when multiple ports are connected to the same switch and there is a
possible loop, or in the case where the cost of the path to the root bridge is the same as it is for another
port. The port with the lower number for port priority is used to forward traffic. The port with the lower
priority (indicated by a higher number) is blocked.
Note
The range for input into the Port Priority field is 0 to 15. The number you enter is
automatically multiplied by 16 when applied.
automatically multiplied by 16 when applied.
Configuring Layer 2 Discovery
The Switching > Layer 2 Discovery page accesses information about switches and other devices in the
network, using the Link Layer Discovery Protocol (LLDP). LLDP is a non-proprietary protocol used by
network devices in the LAN to advertise their identity, capabilities, and interconnections. The LLDP
protocol is defined by the IEEE 802.1AB standard, which is titled “Station and Media Access Control
Connectivity Discovery.”
network, using the Link Layer Discovery Protocol (LLDP). LLDP is a non-proprietary protocol used by
network devices in the LAN to advertise their identity, capabilities, and interconnections. The LLDP
protocol is defined by the IEEE 802.1AB standard, which is titled “Station and Media Access Control
Connectivity Discovery.”
In addition to LLDP, the SonicWALL NSA 2400MX uses Microsoft Link Layer Topology Discovery
(LLTD) protocol to discover nodes visible from a port. Link Layer Topology Discovery (LLTD) is a
Microsoft proprietary protocol with functionality similar to LLDP. It operates on wired or wireless networks
(Ethernet 802.3 or wireless 802.11). LLTD is included on Windows Vista and Windows 7, and can be
installed on Windows XP.
(LLTD) protocol to discover nodes visible from a port. Link Layer Topology Discovery (LLTD) is a
Microsoft proprietary protocol with functionality similar to LLDP. It operates on wired or wireless networks
(Ethernet 802.3 or wireless 802.11). LLTD is included on Windows Vista and Windows 7, and can be
installed on Windows XP.
Note
Windows XP users need to download, install, and enable the LLTD responder driver from
Microsoft.
Microsoft.
Both LLDP and LLTD are Layer 2 protocols and do not cross a broadcast domain. A switch forwarding
table is also used during discovery, and an ARP table is used to connect MAC addresses to IP addresses.
table is also used during discovery, and an ARP table is used to connect MAC addresses to IP addresses.