90
C
HAPTER
10: VLAN O
VERVIEW
You can configure all the three types of ports on the same device. However, note
that you cannot directly switch a port between trunk and hybrid and you must set
the port as access before the switching. For example, to change a trunk port to
hybrid, you must first set it as access and then hybrid.
Adding an Ethernet Port
to Specified VLANs
You can add the specified Ethernet port to a specified VLAN. After that, the
Ethernet port can forward the packets of the specified VLAN, so that the VLAN on
this switch can intercommunicate with the same VLAN on the peer switch.
An access port can only be added to one VLAN, while hybrid and trunk ports can
be added to multiple VLANs.
n
The access ports or hybrid ports must be added to an existing VLAN.
Configuring the Default
VLAN ID for an Ethernet
Port
An Access port can belong to only one VLAN. Therefore, the VLAN an Access port
belongs to is also the default VLAN of the Access port. A Hybrid/Trunk port can
belong to several VLANs, and so a default VLAN ID for the port is required.
After a port is added to a VLAN and configured with a default VLAN, the port
receives and sends packets in a way related to its link type. For detailed
description, refer to Table 42, Table 43, and Table 44:
Table 42
Packet processing of an Access port
Processing of an incoming packet
Processing of an outgoing
packet
If the packet does not
carry a VLAN tag
If the packet carries a VLAN
tag
Receive the packet and add
the default VLAN tag to the
packet.
If the VLAN ID is just the
default VLAN ID, receive the
packet.
If the VLAN ID is not the
default VLAN ID, discard the
packet.
Deprive the tag from the
packet and send the packet.
Table 43
Packet processing of a Trunk port
Processing of an incoming packet
Processing of an outgoing
packet
If the packet does not
carry a VLAN tag
If the packet carries a VLAN
tag
If the port is already added
to its default VLAN, add the
default VLAN tag to the
packet and then forward the
packet.
If the port is not added to its
default VLAN, discard the
packet.
If the VLAN ID is one of the
VLAN IDs allowed to pass
through the port, receive the
packet.
If the VLAN ID is not one of
the VLAN IDs allowed to pass
through the port, discard the
packet.
If the VLAN ID is just the
default VLAN ID, deprive the
tag and send the packet.
If the VLAN ID is not the
default VLAN ID, keep the
original tag unchanged and
send the packet.
Summary of Contents for Switch 7754
Page 32: ...32 CHAPTER 1 CLI OVERVIEW ...
Page 70: ...70 CHAPTER 5 LOGGING IN USING MODEM ...
Page 76: ...76 CHAPTER 7 LOGGING IN THROUGH NMS ...
Page 86: ...86 CHAPTER 9 CONFIGURATION FILE MANAGEMENT ...
Page 120: ...120 CHAPTER 13 ISOLATE USER VLAN CONFIGURATION ...
Page 126: ...126 CHAPTER 14 SUPER VLAN ...
Page 136: ...136 CHAPTER 16 IP PERFORMANCE CONFIGURATION ...
Page 152: ...152 CHAPTER 17 IPX CONFIGURATION ...
Page 164: ...164 CHAPTER 19 QINQ CONFIGURATION ...
Page 172: ...172 CHAPTER 21 SHARED VLAN CONFIGURATION ...
Page 182: ...182 CHAPTER 22 PORT BASIC CONFIGURATION ...
Page 198: ...198 CHAPTER 24 PORT ISOLATION CONFIGURATION ...
Page 208: ...208 CHAPTER 25 PORT SECURITY CONFIGURATION ...
Page 224: ...224 CHAPTER 27 DLDP CONFIGURATION ...
Page 232: ...232 CHAPTER 28 MAC ADDRESS TABLE MANAGEMENT ...
Page 240: ...240 CHAPTER 29 CENTRALIZED MAC ADDRESS AUTHENTICATION CONFIGURATION ...
Page 280: ...280 CHAPTER 30 MSTP CONFIGURATION ...
Page 348: ...348 CHAPTER 35 IS IS CONFIGURATION ...
Page 408: ...408 CHAPTER 39 802 1X CONFIGURATION ...
Page 412: ...412 CHAPTER 40 HABP CONFIGURATION ...
Page 422: ...422 CHAPTER 41 MULTICAST OVERVIEW ...
Page 426: ...426 CHAPTER 42 GMRP CONFIGURATION ...
Page 480: ...480 CHAPTER 47 PIM CONFIGURATION ...
Page 506: ...506 CHAPTER 48 MSDP CONFIGURATION ...
Page 552: ...552 CHAPTER 51 TRAFFIC ACCOUNTING CONFIGURATION ...
Page 570: ...570 CHAPTER 53 HA CONFIGURATION ...
Page 582: ...582 CHAPTER 54 ARP CONFIGURATION SwitchA arp protective down recover interval 200 ...
Page 622: ...622 CHAPTER 58 DHCP RELAY AGENT CONFIGURATION ...
Page 684: ...684 CHAPTER 61 QOS CONFIGURATION ...
Page 718: ...718 CHAPTER 63 CLUSTER ...
Page 738: ...738 CHAPTER 67 UDP HELPER CONFIGURATION ...
Page 752: ...752 CHAPTER 69 RMON CONFIGURATION ...
Page 772: ...772 CHAPTER 70 NTP CONFIGURATION ...
Page 796: ...796 CHAPTER 72 FILE SYSTEM MANAGEMENT ...
Page 802: ...802 CHAPTER 73 BIMS CONFIGURATION ...
Page 814: ...814 CHAPTER 74 FTP AND TFTP CONFIGURATION ...
Page 830: ...830 CHAPTER 75 INFORMATION CENTER ...
Page 836: ...836 CHAPTER 76 DNS CONFIGURATION ...
Page 852: ...852 CHAPTER 77 BOOTROM AND HOST SOFTWARE LOADING ...
Page 858: ...858 CHAPTER 78 BASIC SYSTEM CONFIGURATION DEBUGGING ...