Dell X1000 Networking X-Series Switches User Guide - Page 151

over IEEE 802 Networks

Page 151 highlights

FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Astute\User Guide\Dell_Astute_Network_Admin_VLAN.fm Protocol-based VLANs are useful for isolating Layer 2 traffic of various Layer 3 protocols. If, for example, a switch serves IP stations and IPX stations that communicate with a single VLAN-unaware server, without using protocol-based VLANs, all the Layer 2 Broadcast traffic would reach all the stations. With protocol-based VLANs, the switch can forward incoming traffic of a specific protocol from the server to stations to the VLAN for this protocol only. Protocol-based VLANs are only available on General ports. Classification rules are set on a per-port basis, and may be sensitive to the frame's encapsulation. The default encapsulation assumed is Ethernet. On each port, a user can define associations between groups of data-link layer protocols and ports. For each group/port combination, the user may set the VLAN to which incoming frames on that port will be classified if they belong to any of the protocols in the group. Several protocol-groups may be associated to a single port, and a protocol group may be assigned to multiple ports, if so desired. It is not guaranteed that the VLAN to which the frame is classified exists in the system, or is active on that port. The following frames (packet) types are supported: Ethernet, RFC 1042, and LLC Other. There may be dependencies between protocols and encapsulations, and specifying one protocol may automatically add additional protocols to the protocol-group, such as specifying IP implies ARP and vice-versa. Similarly, there may be implied dependencies between encapsulations, so that specifying an encapsulation implies defining the protocol group for related encapsulations. An example of this is specifying the Ethernet encapsulation, even by default, implies IEEE802 encapsulation, as per RFC 1042. The following standards are relevant: • IEEE802.1V defines VLAN assignment by protocol type. • IETF RFC 10-2 defines a standard for the transmission of IP datagrams over IEEE 802 Networks DELL CONFIDENTIAL - PRELIMINARY 8/9/16 - FOR PROOF ONLY Network Administration: VLAN 151

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Network Administration: VLAN
151
FILE LOCATION:
C:\Users\gina\Desktop\Checkout_new\Dell Astute\User
Guide\Dell_Astute_Network_Admin_VLAN.fm
DELL CONFIDENTIAL – PRELIMINARY 8/9/16 - FOR PROOF ONLY
Protocol-based VLANs are useful for isolating Layer 2 traffic of various Layer
3 protocols. If, for example, a switch serves IP stations and IPX stations that
communicate with a single VLAN-unaware server, without using
protocol-based VLANs, all the Layer 2 Broadcast traffic would reach all the
stations. With protocol-based VLANs, the switch can forward incoming
traffic of a specific protocol from the server to stations to the VLAN for this
protocol only.
Protocol-based VLANs are only available on General ports.
Classification rules are set on a per-port basis, and may be sensitive to the
frame's encapsulation. The default encapsulation assumed is Ethernet.
On each port, a user can define associations between groups of data-link layer
protocols and ports. For each group/port combination, the user may set the
VLAN to which incoming frames on that port will be classified if they belong
to any of the protocols in the group.
Several protocol-groups may be associated to a single port, and a protocol
group may be assigned to multiple ports, if so desired.
It is not guaranteed that the VLAN to which the frame is classified exists in
the system, or is active on that port.
The following frames (packet) types are supported: Ethernet, RFC 1042, and
LLC Other.
There may be dependencies between protocols and encapsulations, and
specifying one protocol may automatically add additional protocols to the
protocol-group, such as specifying IP implies ARP and vice-versa.
Similarly, there may be implied dependencies between encapsulations, so that
specifying an encapsulation implies defining the protocol group for related
encapsulations. An example of this is specifying the Ethernet encapsulation,
even by default, implies IEEE802 encapsulation, as per RFC 1042.
The following standards are relevant:
IEEE802.1V defines VLAN assignment by protocol type.
IETF RFC 10-2 defines a standard for the transmission of IP datagrams
over IEEE 802 Networks