
C
HAPTER
6
| VLAN Configuration
IEEE 802.1Q Tunneling
– 180 –
1.
New SPVLAN tags are added to all incoming packets, no matter how
many tags they already have. The ingress process constructs and
inserts the outer tag (SPVLAN) into the packet based on the default
VLAN ID and Tag Protocol Identifier (TPID, that is, the ether-type of the
tag). This outer tag is used for learning and switching packets. The
priority of the inner tag is copied to the outer tag if it is a tagged or
priority tagged packet.
2.
After successful source and destination lookup, the ingress process
sends the packet to the switching process with two tags. If the
incoming packet is untagged, the outer tag is an SPVLAN tag, and the
inner tag is a dummy tag (8100 0000). If the incoming packet is
tagged, the outer tag is an SPVLAN tag, and the inner tag is a CVLAN
tag.
3.
After packet classification through the switching process, the packet is
written to memory with one tag (an outer tag) or with two tags (both
an outer tag and inner tag).
4.
The switch sends the packet to the proper egress port.
5.
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 packets will
have two tags.
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.
Содержание ES3510MA-DC
Страница 1: ...Management Guide www edge core com 8 Port Layer 2 Fast Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 6: ...ABOUT THIS GUIDE 6...
Страница 44: ...FIGURES 44...
Страница 50: ...TABLES 50...
Страница 52: ...SECTION I Getting Started 52...
Страница 62: ...CHAPTER 1 Introduction System Defaults 62...
Страница 80: ...CHAPTER 2 Initial Switch Configuration Managing System Files 80...
Страница 82: ...SECTION II Web Configuration 82...
Страница 98: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 98...
Страница 126: ...CHAPTER 4 Basic Management Tasks Resetting the System 126...
Страница 164: ...CHAPTER 5 Interface Configuration VLAN Trunking 164 Figure 57 Configuring VLAN Trunking...
Страница 202: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 202...
Страница 452: ...CHAPTER 17 IP Services Displaying the DNS Cache 452...
Страница 498: ...CHAPTER 19 Using the Command Line Interface CLI Command Groups 498...
Страница 588: ...CHAPTER 22 SNMP Commands 588...
Страница 596: ...CHAPTER 23 Remote Monitoring Commands 596...
Страница 650: ...CHAPTER 24 Authentication Commands Management IP Filter 650...
Страница 738: ...CHAPTER 27 Interface Commands 738...
Страница 760: ...CHAPTER 29 Port Mirroring Commands RSPAN Mirroring Commands 760...
Страница 782: ...CHAPTER 32 Address Table Commands 782...
Страница 810: ...CHAPTER 33 Spanning Tree Commands 810...
Страница 862: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 862...
Страница 876: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 876...
Страница 932: ...CHAPTER 38 Multicast Filtering Commands Multicast VLAN Registration 932...
Страница 956: ...CHAPTER 39 LLDP Commands 956...
Страница 1020: ...CHAPTER 42 Domain Name Service Commands 1020...
Страница 1026: ...CHAPTER 43 DHCP Commands DHCP Client 1026...
Страница 1058: ...CHAPTER 44 IP Interface Commands IPv6 Interface 1058...
Страница 1060: ...SECTION IV Appendices 1060...
Страница 1065: ...APPENDIX A Software Specifications Management Information Bases 1065 Trap RFC 1215 UDP MIB RFC 2013...
Страница 1066: ...APPENDIX A Software Specifications Management Information Bases 1066...
Страница 1088: ...COMMAND LIST 1088...
Страница 1097: ......
Страница 1098: ...ES3510MA DC E122010 ST R01 150200000251A...