Cambium Networks PMP 450 AP, Configuration Manual

Page: 78 / 649

Chapter 1: Configuration Configuring IP and Ethernet interfaces
Page
1-50
Attribute Meaning
VLAN Aging Timeout Specify how long the AP must keep dynamically learned VIDs. The range of
values is 5 to
1440 (minutes). The default value is 25 (minutes).
Note
VIDs that you enter for the Management VID and VLAN
Membership parameters do not time out.
Management VID Enter the VID that the operator wishes to use to communicate with the
module manager. The range of values is 1 to 4095. The default value is 1.
QinQ EtherType
Modules can be configured with 802.1ad Q-in-Q DVLAN (Double-
VLAN) tagging which is a way for an operator to put an 802.1Q
VLAN inside of an 802.1ad VLAN. A nested VLAN, which is the
original 802.1Q tag and a new second 802.1ad tag, allows for
bridging of VLAN traffic across a network and segregates the
broadcast domains of 802.1Q VLANs. Q-in-Q can be used with
PPPoE and/or NAT.
The 802.1ad standard defines the S-VLAN as the Service Provider
VLAN and the C-VLAN as the customer VLAN. The radio software
does 2 layer Q-in-Q whereby the C-VLAN is the 802.1Q tag and the
S-VLAN is the second layer Q tag as shown below:
Table 14 Q-in-Q Ethernet frame
Ethernet
Header S-VLAN EthType
0x88a8 C-VLAN EthType
0x8100 IP Data EthType
0x0800
The 802.1ad S-VLAN is the outer VLAN that is configurable on the
Configuration > VLAN web page of the AP. The Q-in-Q EtherType
parameter is configured with a default EtherType of 0x88a8 in addition to
four alternate EtherTypes that can be configured to aid in interoperability
with existing networks that use a different EtherType than the default.
The C-VLAN is the inner VLAN tag, which is the same as 802.1Q. As a top-
level concept, this operates on the outermost tag at any given time, either
“pushing” a tag on or “popping” a tag off. This means packets will at most
transition from an 802.1Q frame to an 801.ad frame (with a tag “pushed” on)
or an untagged 802.1 frame (with the tag “popped” off. Similarly, for an
802.1ad frame, this can only transition from an 802.1ad frame to an 802.1Q
frame (with the tag “popped” off) since the radio software only supports 2
levels of tags.
Use AP's Management
VID for ICC connected
SM This field allows the SM to use the AP’s management VLAN ID when the SM
is registered to the AP via ICC.