VLAN Commands
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VLAN Commands
PowerConnect 802.1Q VLANs are an implementation of the Virtual Local
Area Network, specification 802.1Q. Operating at Layer 2 of the OSI model,
the VLAN is a means of parsing a single network into logical user groups or
organizations as if they physically resided on a dedicated LAN segment of
their own. In reality, this virtually defined community may have individual
members scattered across a large, extended LAN. The VLAN identifier is part
of the 802.1Q tag, which is added to an Ethernet frame by an 802.1Q-
compliant switch or router. Devices recognizing 802.1Q-tagged frames
maintain appropriate tables to track VLANs. The first 3 bits of the 802.1Q tag
are used by 802.1p to establish priority for the packet.
PowerConnect supports 802.1Q VLANs. As such, ports may simultaneously
belong to multiple VLANs. VLANs allow a network to be logically segmented
without regard to the physical locations of devices in the network.
PowerConnect switching supports up to 1024 VLANs for forwarding.
VLANs can be allocated by subnet and netmask pairs, thus allowing
overlapping subnets. For example, subnet 10.10.128.0 with Mask
255.255.128.0 and subnet 10.10.0.0 with Mask 255.255.0.0 can have different
VLAN associations.
Double VLAN Mode
An incoming frame is identified as tagged or untagged based on Tag Protocol
Identifier (TPID) value it contains. The 802.1Q standard specifies a TPID
value (0x8100) to recognize an incoming frame as tagged or untagged. Any
valid Ethernet frame with a value 0x8100 in the 12th and 13th bytes is
recognized as tagged frame. 802.1Q switches check the 12th and 13th bytes to
decide the tag status of incoming frame.
The PowerConnect switching component can be configured to enable the
port in double-VLAN (DVLAN) mode. In this mode switch looks for 12th,
13th, 16th, and 17th bytes for the tag status in the incoming frame. The outer
tag (S-TAG) TPID is identified with the 12th and 13th bytes values. The
inner tag (C-TAG) TPID is identified with 16th and 17th bytes values. These
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Страница 76: ...Contents 76 ...
Страница 168: ...Command Groups 168 ...
Страница 242: ...Using the CLI 242 ...
Страница 244: ...244 Layer 2 Switching Commands ...
Страница 278: ...278 AAA Commands ...
Страница 287: ...Administrative Profiles Commands 287 global config ethernet config port channel config ...
Страница 288: ...288 Administrative Profiles Commands ...
Страница 326: ...326 Address Table Commands Maximum addresses 100 Learned addresses ...
Страница 332: ...332 Auto VoIP Commands ...
Страница 366: ...366 DHCP Management Interface Commands ...
Страница 464: ...464 Ethernet CFM Commands ...
Страница 478: ...478 Green Ethernet Commands ...
Страница 502: ...502 IGMP Snooping Commands ...
Страница 542: ...542 IPv6 Access List Commands ...
Страница 554: ...554 IPv6 MLD Snooping Commands ...
Страница 568: ...568 IP Source Guard Commands ...
Страница 580: ...580 iSCSI Optimization Commands ...
Страница 588: ...588 Link Dependency Commands ...
Страница 616: ...616 LLDP Commands ...
Страница 652: ...652 Port Channel Commands ...
Страница 656: ...656 Port Monitor Commands Session ID Admin Mode Probe Port Mirrored Port Type 1 Enable 1 0 10 1 0 8 Rx Tx ...
Страница 752: ...752 RADIUS Commands ...
Страница 784: ...784 Spanning Tree Commands ...
Страница 850: ...850 VLAN Commands ...
Страница 856: ...856 Voice VLAN Commands ...
Страница 888: ...888 802 1x Commands console show dot1x advanced gigabitethernet 1 0 2 Port Guest Unauthenticated VLAN Vlan 1 0 2 10 20 ...
Страница 890: ...890 Layer 3 Commands ...
Страница 934: ...934 DHCP Server and Relay Agent Commands ...
Страница 952: ...952 DHCPv6 Commands DHCPv6 Relay forward Packets Transmitted 0 Total DHCPv6 Packets Transmitted 0 ...
Страница 960: ...960 DVMRP Commands ...
Страница 980: ...980 IGMP Commands ...
Страница 988: ...988 IGMP Proxy Commands ...
Страница 1036: ...1036 IP Routing Commands ...
Страница 1109: ...IPv6 Routing Commands 1109 Tracing route over a maximum of 20 hops 1 N N N ...
Страница 1110: ...1110 IPv6 Routing Commands ...
Страница 1114: ...1114 Loopback Interface Commands ...
Страница 1144: ...1144 Multicast Commands ...
Страница 1296: ...1296 OSPFv3 Commands ...
Страница 1306: ...1306 Router Discovery Protocol Commands ...
Страница 1322: ...1322 Routing Information Protocol Commands console config router split horizon none ...
Страница 1328: ...1328 Tunnel Interface Commands ...
Страница 1354: ...1354 Utility Commands ...
Страница 1364: ...1364 Auto Install Commands ...
Страница 1406: ...1406 CLI Macro Commands ...
Страница 1424: ...1424 Clock Commands ...
Страница 1430: ...1430 Command Line Configuration Scripting Commands ...
Страница 1451: ...Configuration and Image File Commands 1451 console ...
Страница 1452: ...1452 Configuration and Image File Commands ...
Страница 1482: ...1482 Mode Commands ...
Страница 1517: ...Power Over Ethernet Commands 1517 Command Mode Privileged EXEC User Guidelines This command has no user guidelines ...
Страница 1518: ...1518 Power Over Ethernet Commands ...
Страница 1576: ...1576 Sflow Commands ...
Страница 1604: ...1604 SNMP Commands ...
Страница 1618: ...1618 SSH Commands ...
Страница 1640: ...1640 Syslog Commands ...
Страница 1708: ...1708 System Management Commands 5 ...
Страница 1716: ...1716 Terminal Length Commands ...
Страница 1734: ...1734 User Interface Commands Example The following example closes an active terminal session console quit ...
Страница 1786: ...1786 Appendix A List of Commands ...
Страница 1787: ...www dell com support dell com Printed in the U S A ...
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