118
information. (Remember that the PVID is only used internally within the Switch). Untagging is
used to send packets from an 802.1Q-compliant network device to a non-compliant network
device.
Frame Income
Frame Leave
Income Frame is
tagged
Income Frame is
untagged
Leave port is tagged
Frame remains tagged
Tag is inserted
Leave port is untagged
Tag is removed
Frame remain untagged
Table 4-6-1:
Ingress / Egress Port with VLAN VID Tag / Untag Table
■
IEEE 802.1Q Tunneling (Q-in-Q)
IEEE 802.1Q Tunneling (QinQ) is designed for service providers carrying traffic for multiple customers across their networks. QinQ
tunneling is used to maintain customer-specific VLAN and Layer 2 protocol configurations even when different customers use the
same internal VLAN IDs. This is accomplished by inserting
Service Provider VLAN (SPVLAN)
tags into the customer’s frames
when they enter the service provider’s network, and then stripping the tags when the frames leave the network.
A service provider’s customers may have specific requirements for their internal VLAN IDs and number of VLANs supported. VLAN
ranges required by different customers in the same service-provider network might easily overlap, and traffic passing through the
infrastructure might be mixed. Assigning a unique range of VLAN IDs to each customer would restrict customer configurations, require
intensive processing of VLAN mapping tables, and could easily exceed the maximum VLAN limit of 4096.
The Managed Switch supports multiple VLAN tags and can therefore be used in MAN applications as a provider bridge, aggregating
traffic from numerous independent customer LANs into the
MAN (Metro Access Network)
space. One of the purposes of the
Summary of Contents for NS4702-24P-4S-4X
Page 1: ...NS4702 24P 4S 4X User Manual P N 1072829 REV 00 01 ISS 14JUL14 ...
Page 23: ...23 Storage Temperature 10 70 degrees C Relative Humidity 5 95 non condensing ...
Page 164: ...164 Figure 4 8 2 Multicast Flooding ...
Page 183: ...183 Figure 4 8 14 IGMP Snooping VLAN Configuration Page Screenshot ...
Page 189: ...189 Figure 4 8 17 MLD Snooping Groups Information Page Screenshot ...
Page 208: ...208 Figure 4 9 6 QoS Egress Port Tag Remarking Page Screenshot ...
Page 218: ...218 Deletes the QCE The lowest plus sign adds a new entry at the bottom of the list of QCL ...
Page 229: ...229 Figure 4 9 18 Voice VLAN Configuration Page Screenshot ...
Page 299: ...299 Figure 4 11 17 Add User Properties Screen Figure 4 11 18 Add User Properties Screen ...
Page 336: ...336 Figure 4 14 2 LLDPMED Configuration Page Screenshot ...
Page 357: ...357 Figure 4 15 4 VeriPHY Cable Diagnostics Page Screenshot ...
Page 367: ...367 ...
Page 391: ...391 ...