Lenovo Flex System Fabric CN4093 User Manual

146 CN4093 Application Guide for N/OS 8.4
Ingress VLAN Tagging
Taggingcanbeenabledonaningressport.Whena packetisreceivedonaningress
port,andifingresstaggingisenabledontheport,aVLANtagwiththeportPVID
isinsertedintothepacketastheouterVLANtag.Dependingontheegressport
setting(taggedor
untagged),theoutertagofthepacketisretainedorremoved
whenitleavestheegressport.
IngressVLANtaggingisusedtotunnelpacketsthroughapublicdomainwithout
alteringtheoriginal802.1Qstatus.
Wheningresstaggingisenabledonaport,allpackets,whetheruntaggedor
tagged,willbe
taggedagain.AsshowninFigure 7,whentaggingisenabledonthe
egressport,theoutertagofthepacketisretainedwhenitleavestheegressport.If
taggingisdisabledontheegressport,theoutertagof thepacketisremovedwhen
itleavestheegressport.
Figure 7.
802.1Qtagging(afteringresstaggingassignment)
Bydefault,ingresstaggingisdisabled.Toenableingresstaggingonaport,usethe
followingcommands:
Limitations
Ingresstaggingcannotbeconfiguredwiththefollowingfeatures/configurations:
 vNICports
 VMreadyports
 UFPports
 Managementports
CN 4093(config)# interface port <number>
CN 4093(config-if)# tagpvid-ingress
Port 6
DASADataCRC
Port 7 Port 8
Port 1
Port 4 Port 5
Port 2 Port 3
802.1Q Switch
PVID = 2
Untagged packet
Untagged member
of VLAN 2
Tagged member
of VLAN 2
Before
DASADataCRC* Tag
DASADataCRC* Tag
After
DASADataCRC
Port 6 Port 7 Port 8
Port 1
Port 4 Port 5
Port 2 Port 3
802.1Q Switch
PVID = 2
Tagged packet
Untagged member
of VLAN 2
Tagged member
of VLAN 2
Before
DASADataCRC* Tag 1DASADataCRC* Tag 1
After
DASADataCRC* Tag 1
Tag 2
Tag 2
DASADataCRC* Tag 1
Untagged packet received on ingress port
Tagged packet received on ingress port

Lenovo Flex System Fabric CN4093 Specifications

General

Brand	Lenovo
Model	Flex System Fabric CN4093
Category	Switch
Language	English