User's Manual

44 ALFOplus 24GHz (North America) - Release 01.05.0x - MN.00395.E - 004
For example, it is possible to assign specific CIR/EIR policies basing on:
• the type of service (e.g, voice, signalling, data, etc..)
• the specific operator (e.g. in case the microvawe network is shared between 2 or more operators)
• the destination terminal (e.g. each NodeB can have a specific CIR/EIR profile)
In order to define the bandwidth profile, the following parameters must be configured:
• CIR (Committed Information rate): it is the admitted ingress rate (“green” coloured), with values
between 0 kbit/s and 1 Gbit/s
• CBS (Committed Burst size): it is the maximum size of the token bucket of the green packets, with
values between 0 byte and 128 kbyte.
• EIR (Excess Information Rate): it is maximum ingress rate admitted when possible (“yellow”
coloured), with values between 0kbit/s and 1Gbit/s.
• EBS (Excess Burst size): it is maximum size of the token bucket of the yellow packets, with values
between 0 byte and 128 kbyte.
• CF (Coupling Flag): if enabled, the excess token (if any) charged into the green bucket are moved
into the yellow packet bucket.
Red packets, i.e. the ones exceeding the CIR+EIR rate, are automatically discarded. In other words, the
rate obtained with the sum of CIR+EIR is the maximum rate allowed to be transmitted.
7.3.4 Enhanced VLAN Management
The SIAE switch provides the following enhanced VLAN management features:
• VLAN rewriting
• Selective QinQ based on VLAN and IEEE 802.1p priority
VLAN rewriting
VLAN rewriting is a feature available on radio side that allows to rewrite the VID of C-TAG of the packet
received (uplink side) or sent (downlink side) by the switch.
On uplink side (packets received on LAN interface by the switch and sent to the radio) the VID can be re-
written on the basis of the following criteria:
- LAN port + C-VID: new values of C-VID to be written into the packet can be configured on the basis
of its original C-VID and the LAN port where it has been received.
- LAN port + C-VID + priority: new values of C-VID to be written into the packet can be configured
on the basis of its original C-VID + priority and the LAN port where it has been received.
On uplink side it is possible to configure for all the LAN ports up to 64 LAN port + C-VID or LAN port + C-
VID + priority criteria.
On downlink side (packets received on radio side and sent by the switch on the LAN interface):
• the VID can be rewritten on the basis of the C-VID of the received packet. I.e., new values of C-
VID to be written into the packet can be configured on the basis of its original C_VID. It is possible
to configure up to 64 C-VID criteria in downlink, independently by the uplink configuration.
• C-VID can be removed selectively. It is possible to select the C-VID, enable the option “Removed”
and select the Output interface. In other words on downlink side it is possible to select the C-VID
to be remove and the correspondent Output LAN.
Selective QinQ based on VLAN and IEEE 802.1p priority
VLAN staking (also named QinQ) is a feature that allows an Ethernet frame to include more than one IEEE
802.1Q TAG. The scope of VLAN staking is to differentiate the traffic at different levels when the packets
must cross networks managed by different entities.
The SIAE switch radio supports the Vlan staking. Once a packet enters into the radio it is possible to add
a new IEEE 802.1Q TAG. The VID of the new TAG can be set based on different criteria: