Specifications

Alcatel-Lucent
OS-LS6200 Series Page 25
o BPDU Filtering when STP is disabled
o Spanning Tree Protocol (STP) Root Guard
o Spanning Tree Protocol (STP) BPDU Guard
• System IP Address Management
•
• BootP and DHCP Clients for IP Address Assignments
•
• Jumbo Frames (up to 9000 Bytes) 4.1.7
• Quality of Service Features --- L2/L3/L4 QoS / CoS/QoS
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To overcome unpredictable network traffic and optimize performance, you can apply
Quality of Service (QoS) throughout the network to ensure that network traffic is prioritized
according to specific criteria. The switch supports two modes of QoS: basic and advanced.
QoS in brief:
o 802.1p, TOS, DSCP marking 4.1.8, 4.1.9
o QoS mapping: 802.1p to TOS/DSCP, TOS to 802.1p/DSCP, DSCP to
802.1p/TOS
o Classification per port, 802.1p(COS) value, MAC SA/DA, Ethertype, TOS
precedence, DSCP value, ICMP code and type, IP SA/DA, IP protocol,
TCP/UDP port
o Four egress queues per port that support strict and WRR queuing algorithms
o Ingress bandwidth rate limiting per port/flow
o
o Egress bandwidth rate limiting per port/queue
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o Inner VLAN classification
o
o IP ACL Classification
Performance
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Forwarding Modes The OmniStack LS 6200 provides only the store-and-forward mode for forwarding frames. The entire
frame is received and stored in memory before it can be forwarded to the destination port.
User ports • OS-LS-6200: 12 or 24 or 48-10/100BaseT RJ-45 ports on the front panel. Each copper port is capable
of auto-MDI/MDI-X sensing and PoE capability.
• OS-LS-6224U: 24 100BaseX fiber ports on the front panel. Each fiber port support external SFP
optical transceivers for 100MB fiber connectivity.
Stacking ports • OS-LS-6200: Two 10/100/1000 copper RJ-45 ports. OS-LS-6200 supports a fault tolerant looped
stacking configuration. In a standalone configuration, these ports can be used as normal network ports.
Stacking Support The OmniStack LS 6200 stack consists of up to eight stackable units.
One of the units acts as a stack master, while all other units act as slaves. One of the slaves can also act
as a backup stack master. Network managers can remotely manage the entire stack, transparently to
the stack topology and the number of units included in the stack. The stack is managed as a single
switch. The Stack Topology can be Ring or Chain. A ring topology is one in which every unit is
connected to two other units. A chain topology is one in which two of the units in the stack are
connected to a single unit.
Combo ports • OS-LS-6200: Two Gigabit Ethernet SFP (mini-GBIC) plus two 10/100/1000 RJ-45 combo ports are
located on the front panel. Users determine whether the mini-GBIC or 10/100/1000 ports will operate.
The mini-GBIC ports support full duplex mode only.
• SFP (Mini-GBIC) ports support 100Base-X fiber optic transceivers for 100mb fiber connectivity
Auto MDI/MDIX
The device automatically detects whether the cable
connected to an RJ-45 port is crossed or straight
through, and adapts the internal wiring of the
interface, so as to create a working connection.
Standard wiring for end stations is Media-Dependent
Interface (MDI) and the standard wiring for hubs and
switches is known as Media-Dependent Interface with
Crossover (MDIX).
Normally, Twisted Pair ports must be connected so that the Transmit pair on one end is connected to
the Receive pair on the other end, and vice versa. If the cabling is done so that Transmit on one end is
wired to Transmit on the other, and Receive is wired to Receive, a link will not be established.
Hubs and switches are deliberately wired opposite to the way end stations are wired, so that when a
hub or switch is connected to an end station, a "straight through" Ethernet cable can be used, and the
pairs will match up properly. When two hubs/switches are connected to each other, or two end stations
are connected to each other, a "crossover" cable is used to make sure that the correct pairs are
connected. The standard wiring for end stations is known as MDI (Media Dependent Interface), and
the standard wiring for hubs and switches is known as MDIX (Media Dependent Interface with
Crossover). On certain devices, it is possible for hardware to automatically correct errors in cable
selection, making the distinction between a "straight through" cable and a "crossover" cable irrelevant.
This capability is known as Auto Cross.
Auto MDI/MDIX works only on 10BASE-T/100 BASE-T /1000 BASE-T ports.
Auto detection of both crossed and uncrossed cables on all RJ45 ports.
This feature is automatically enabled for the entire system.
Auto-negotiation
Auto negotiating speed and half/full duplex settings
on all ports
Auto negotiation allows the device to advertise modes of operation. The auto negotiation function
provides the means to exchange information between two devices that share a point-to-point link
segment, and to automatically configure both devices to take maximum advantage of their transmission
capabilities. Auto-negotiation advertisement is supported. Port advertisement allows the system
administrator to configure the port speed and duplex advertisement.
The device can ne
g
otiate for each
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ort confi
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uration of s
p
eed
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du
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lex mode and flow control. Each