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Ingress Rule:
Each packet received by a VLAN-aware bridge will be classified to a VLAN.
The classification rule is described as follows.
1. If the VID of the packet is null VID (VID=0), or this packet is an untagged packet:
a. If there are still some other ways (e.g. protocol, MAC address, application,
IP-subnet, etc.) to classify the incoming packets beside port-based
classification implemented and these approaches can offer a non-zero
VID, then use the value of VID offered by the other classifications for this
VLAN’s classification.
b. If there is only port-based classification implemented or other classification
approaches cannot offer a non-zero VID for the incoming packets, then
assign the PVID to the incoming packets as VID for the classification of
the VLAN group.
2. If the VID is not a null VID (VID≠0), then use the value to classify the VLAN group.
Egress Rule:
An egress list is used to make the tagging and forwarding decision on an
outgoing port. It specifies the VLANs whose packets can be transmitted out and
specifies if the packet should be tagged or not. It can be configured for the port’s
VLAN membership, and tagged or untagged for a transmitted packet. When a
packet is transmitted out, the VLAN bridge checks the port’s egress list. If the VLAN
of the packet is on the egress list of the port on which the packet is transmitted out,
the packet will be transmitted with the priority accordingly. If enabled, an egress port
will transmit out a tagged packet if the port is connected to an 802.1Q-compliant
device. If an egress port is connected to a non-802.1Q device or an end station, the
VLAN bridge must transmit out an untagged packet, i.e. the tag has been stripped
off in an egress port. Egress rule can be set on a per port basis.
Independent VLAN Learning (IVL):
It specifies the mode used to learn MAC addresses. For a specified VLAN, it
will use an independent filtering database (FID) to learn or look up the membership
information of the VLAN and decide where to go.
Shared VLAN Learning (SVL):
It specifies the mode used to learn MAC addresses. In this mode, some
VLANs or all VLANs use the same filtering database, storing the membership
information of the VLAN to learn or look up the membership information of the
VLAN. In the 065-7931 switch, you can choose a VID for sharing the filtering
database in the Shared VID field if you wish to use the existing filtering database.
For a specified VLAN, when a MAC address is learned by a switch, the VLAN will
use this information to make the forwarding decision.
Filtering Database:
Referred to as FID. It can provide the information regarding where the packet
will be sent. The filtering database will supply the outgoing port according to the
request from a forwarding process with VID and DA. When a packet is received, if it
has a non-zero VID, then the FID will offer the associated outgoing ports information
to the packet.
In SVL, VLANs use the same Filtering Database. In IVL, VLANs use different
FIDs. Any VID can be assigned to the same FID by the administrator.
- U s e r’s G u i d e 1
- Table of Contents 4
- Revision History 6
- About this user’s manual 9
- 1. Introduction 10
- 1-2. Checklist 11
- 1-3. Features 11
- 2. Installation 16
- 2-1-2. Cabling Requirements 17
- 18
- Ethernet LAN 23
- 2-1-4. IP Address Assignment 24
- 1 0000000 26
- 1 1111111 26
- Fig. 2-9 28
- 2-2. Typical Applications 29
- 3. Basic Concept and 31
- Management 31
- Table 3-2 33
- Table 3-1 LLC Format 33
- Fig. 3-2 SAP Format 34
- How does a MAC work? 37
- 64 bytes 38
- 3-3. Flow Control 40
- Table 3-5 42
- Fig.3-5 Collision Domain 44
- Fig. 3-6 45
- 3-5. Virtual LAN 47
- Fig. 3-8 48
- Fig.3-9 Tag Format 49
- Table 3-6 52
- Table 3-7 52
- 3-6. Link Aggregation 53
- 4. Operation of 55
- Web-based Management 55
- Page Layout Information 57
- 4-2. Configuration 58
- 4-2-1. System Configuration 59
- 4-2-2. Ports Configuration 62
- Fig. 4-4 63
- Fig. 4-5 65
- Fig. 4-7 68
- Fig. 4-8 68
- Fig. 4-9 69
- ;). Untag means the outgoing 70
- Fig. 4-10 71
- Fig. 4-11 72
- ;) under the 73
- Fig. 4-13 74
- Fig. 4-14 75
- Fig. 4-15 77
- Fig. 4-16 Advanced Mode 81
- Fig. 4-17 Simple Mode 81
- Fig. 4-18 82
- 4-2-9. Bandwidth Management 83
- Fig. 4-20 85
- 4-2-11. Max. Packet Length 86
- 4-3. Monitoring 87
- 4-3-2. Detailed Statistics 88
- Fig. 4-23 90
- 4-4-1. Status 91
- Fig. 4-25 94
- Fig. 4-27 Tag-based VLAN 97
- Fig. 4-31 100
- Fig. 4-32 101
- 4-4-2. Warm Restart 102
- 4-4-3. Factory Default 103
- 4-4-4. Logout 104
- 5. Maintenance 105
- Technical Specifications 106
- Appendix A 106
- Hardware Specifications 107
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