Configuring VLANs
575
When a port is in General mode, all VLAN features are configurable. When
ingress filtering is on, the frame is dropped if the port is not a member of the
VLAN identified by the VLAN ID in the tag. If ingress filtering is off, all
tagged frames are forwarded. The port decides whether to forward or drop the
frame when the port receives the frame.
VLAN Tagging
PowerConnect 7000 Series switches support IEEE 802.1Q tagging. Ethernet
frames on a tagged VLAN have a 4-byte VLAN tag in the header. VLAN
tagging is required when a VLAN spans multiple switches, which is why trunk
ports transmit and receive only tagged frames.
Tagging may be required when a single port supports multiple devices that are
members of different VLANs. For example, a single port might be connected
to an IP phone, a PC, and a printer (the PC and printer are connected via
ports on the IP phone). IP phones are typically configured to use a tagged
VLAN for voice traffic, while the PC and printers typically use the untagged
VLAN.
When a port is added to a VLAN as an untagged member, untagged packets
entering the switch are tagged with the PVID (also called the
native VLAN
)
of the port. If the port is added to a VLAN as an untagged member, the port
does not add a tag to a packet in that VLAN when it exits the port.
Table 21-2. Switchport Mode Behavior
Mode
VLAN Membership
Frames
Accepted
Frames Sent
Ingress
Filtering
Access
One VLAN
Untagged
Untagged
Always On
Trunk
All VLANs that exist
in the system
Tagged
Tagged
Always On
General
As many as desired
Tagged or
Untagged
Tagged or
Untagged
On or Off
NOTE:
A stack of switches behaves as a single switch, so VLAN tagging is not
required for packets traversing different stack members.
Содержание PowerConnect 7024
Страница 134: ...134 Setting Basic Network Information ...
Страница 290: ...290 Managing General System Settings Figure 11 14 SNTP Servers Table ...
Страница 348: ...348 Configuring SNMP ...
Страница 430: ...430 Monitoring Switch Traffic ...
Страница 444: ...444 Configuring iSCSI Optimization ...
Страница 521: ...Configuring 802 1X and Port Based Security 521 Figure 19 8 Configure Port Security Settings 5 Click Apply ...
Страница 538: ...538 Configuring 802 1X and Port Based Security ...
Страница 585: ...Configuring VLANs 585 Figure 21 5 Add Ports to VLAN 4 Click Apply 5 Verify that the ports have been added to the VLAN ...
Страница 594: ...594 Configuring VLANs Figure 21 16 GVRP Port Parameters Table ...
Страница 600: ...600 Configuring VLANs Figure 21 23 Double VLAN Port Parameter Table ...
Страница 658: ...658 Configuring the Spanning Tree Protocol ...
Страница 693: ...Configuring Port Based Traffic Control 693 Figure 24 3 Storm Control 5 Click Apply ...
Страница 780: ...780 Configuring Connectivity Fault Management ...
Страница 804: ...804 Snooping and Inspecting Traffic Figure 27 17 DAI Interface Configuration Summary ...
Страница 818: ...818 Snooping and Inspecting Traffic ...
Страница 836: ...836 Configuring Link Aggregation ...
Страница 882: ...882 Configuring DHCP Server Settings ...
Страница 916: ...916 Configuring L2 and L3 Relay Features Figure 33 3 DHCP Relay Interface Summary ...
Страница 924: ...924 Configuring L2 and L3 Relay Features Figure 33 12 IP Helper Statistics ...
Страница 930: ...930 Configuring L2 and L3 Relay Features ...
Страница 1004: ...1004 Configuring OSPF and OSPFv3 ...
Страница 1044: ...1044 Configuring VRRP ...
Страница 1057: ...Configuring IPv6 Routing 1057 Figure 37 9 IPv6 Route Preferences ...
Страница 1064: ...1064 Configuring IPv6 Routing ...
Страница 1084: ...1084 Configuring DHCPv6 Server and Relay Settings ...
Страница 1091: ...Configuring Differentiated Services 1091 Figure 39 5 DiffServ Class Criteria ...
Страница 1114: ...1114 Configuring Differentiated Services ...
Страница 1130: ...1130 Configuring Class of Service ...
Страница 1136: ...1136 Configuring Auto VoIP ...
Страница 1216: ...1216 Managing IPv4 and IPv6 Multicast ...