C
HAPTER
6
| VLAN Configuration
IEEE 802.1Q Tunneling
– 208 –
Layer 2 Flow for Packets Coming into a Tunnel Uplink Port
An uplink port receives one of the following packets:
◆
Untagged
◆
One tag (CVLAN or SPVLAN)
◆
Double tag (CVLAN + SPVLAN)
The ingress process does source and destination lookups. If both lookups
are successful, the ingress process writes the packet to memory. Then the
egress process transmits the packet. Packets entering a QinQ uplink port
are processed in the following manner:
1.
If incoming packets are untagged, the PVID VLAN native tag is added.
2.
If the ether-type of an incoming packet (single or double tagged) is not
equal to the TPID of the uplink port, the VLAN tag is determined to be a
Customer VLAN (CVLAN) tag. The uplink port’s PVID VLAN native tag is
added to the packet. This outer tag is used for learning and switching
packets within the service provider’s network. The TPID must be
configured on a per port basis, and the verification cannot be disabled.
3.
If the ether-type of an incoming packet (single or double tagged) is
equal to the TPID of the uplink port, no new VLAN tag is added. If the
uplink port is not the member of the outer VLAN of the incoming
packets, the packet will be dropped when ingress filtering is enabled. If
ingress filtering is not enabled, the packet will still be forwarded. If the
VLAN is not listed in the VLAN table, the packet will be dropped.
4.
After successful source and destination lookups, the packet is double
tagged. The switch uses the TPID of 0x8100 to indicate that an
incoming packet is double-tagged. If the outer tag of an incoming
double-tagged packet is equal to the port TPID and the inner tag is
0x8100, it is treated as a double-tagged packet. If a single-tagged
packet has 0x8100 as its TPID, and port TPID is not 0x8100, a new
VLAN tag is added and it is also treated as double-tagged packet.
5.
If the destination address lookup fails, the packet is sent to all member
ports of the outer tag's VLAN.
6.
After packet classification, the packet is written to memory for
processing as a single-tagged or double-tagged packet.
7.
The switch sends the packet to the proper egress port.
8.
If the egress port is an untagged member of the SPVLAN, the outer tag
will be stripped. If it is a tagged member, the outgoing packet will have
two tags.
Summary of Contents for ES3528MV2
Page 1: ...Management Guide www edge core com ES3528MV2 ES3528MV2 DC 28 Port Fast Ethernet Layer 2 Switch...
Page 2: ......
Page 4: ......
Page 48: ...CONTENTS 48...
Page 68: ...SECTION I Getting Started 68...
Page 78: ...CHAPTER 1 Introduction System Defaults 78...
Page 96: ...SECTION II Web Configuration 96...
Page 116: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 116...
Page 148: ...CHAPTER 4 Basic Management Tasks Resetting the System 148...
Page 192: ...CHAPTER 5 Interface Configuration VLAN Trunking 192 Figure 65 Configuring VLAN Trunking...
Page 226: ...CHAPTER 6 VLAN Configuration Configuring VLAN Translation 226...
Page 236: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 236...
Page 270: ...CHAPTER 9 Congestion Control Automatic Traffic Control 270...
Page 300: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 300...
Page 418: ...CHAPTER 13 Security Measures DHCP Snooping 418...
Page 588: ...CHAPTER 15 IP Configuration Setting the Switch s IP Address IP Version 6 588...
Page 606: ...CHAPTER 16 IP Services Configuring the PPPoE Intermediate Agent 606...
Page 676: ...CHAPTER 17 Multicast Filtering Multicast VLAN Registration for IPv6 676...
Page 772: ...CHAPTER 20 System Management Commands Switch Clustering 772...
Page 802: ...CHAPTER 22 Remote Monitoring Commands 802...
Page 808: ...CHAPTER 23 Flow Sampling Commands 808...
Page 872: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 872...
Page 950: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 950...
Page 1002: ...CHAPTER 27 Interface Commands Power Savings 1002...
Page 1016: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1016...
Page 1046: ...CHAPTER 30 Congestion Control Commands Automatic Traffic Control Commands 1046...
Page 1058: ...CHAPTER 32 UniDirectional Link Detection Commands 1058...
Page 1064: ...CHAPTER 33 Address Table Commands 1064...
Page 1124: ...CHAPTER 35 ERPS Commands 1124...
Page 1168: ...CHAPTER 36 VLAN Commands Configuring Voice VLANs 1168...
Page 1182: ...CHAPTER 37 Class of Service Commands Priority Commands Layer 3 and 4 1182...
Page 1202: ...CHAPTER 38 Quality of Service Commands 1202...
Page 1360: ...CHAPTER 41 CFM Commands Delay Measure Operations 1360...
Page 1382: ...CHAPTER 43 Domain Name Service Commands 1382...
Page 1440: ...SECTION IV Appendices 1440...
Page 1468: ...COMMAND LIST 1468...
Page 1479: ......
Page 1480: ...ES3528MV2 ES3528MV2 DC E112013 ST R03...