Configuration/Create Bridged Data Connections Help

Slot Displays the slot number and the card description.

Port Select the type of port.

To select all the ports on the card, click the Select All button.

To clear all the ports on the card, click the Clear All button.

Settings for bridge connections differ depending on the type of card.

ADSL2+

Ethernet

GPON

SHDSL

T1 Bonded

VDSL

ADSL card

Slot Displays the slot number and the card description.

Port: ADSLBONDED

VCL

VPI

The VPI for this VCL. This must match the remote end of the connection.

VCI

The VCI for this VCL. This must match the remote end of the connection.

Use existing traffic descriptor

Select from the drop-down list.

Create New (traffic descriptor)

Service Category

CBR or UBR

Bandwidth

Bandwidth for the connection.

Usage Parameter Control

Enables or disables policing on the traffic descriptor.

Note that this must be set to true if the ATM service category is CBR.

AAL5 Encapsulation

This parameter applies only when the local VCL end-point is also the VCC end-point, and AAL5 is in use. The type of data encapsulation used over the AAL5 SSCS layer. The definitions reference RFC 1483 Multiprotocol Encapsulation over ATM AAL5 and to the ATM Forum LAN Emulation specification.

Values:

RFC 1483 multiprotocol encapsulation over AAL5. Used for bridged termination connections.

Rfc1483 Routed

Rfc1483 Bridged

Accept PPPoA Packets

Upon detecting PPPoA traffic, the device initiates a PPPoE session with the Broadband Remote Access Server (BRAS). PPP traffic between the CPE and the BRAS is tunneled over this PPPoE session. The device autosenses the type of PPPoA encapsulation as either VCMUX or LLC.

After configuring the physical interface, configure the bridging interface.

 

Ethernet Card

Slot Displays the slot number and the card description.

Port: ETHERNET

Select the LinkAgg group or the non-aggregated Ethernet ports for the bridge, then configure the bridging interface.

 

GPON Card

Slot Displays the slot number and the card description.

Select the ONU port (OLT+GEM)  for the bridge.

GPON Traffic Profile

Use Existing GPON Traffic Profile. Select an existing GPON traffic profile from the drop-down list.

Create New

Guaranteed Upstream Bandwidth

Specifies the upstream bandwidth for the GEM port. The value should be multiple of 512 and cannot exceed 2.5 Gbps. The value is in the unit of kbps.

Class

Specifies the upstream traffic class value.

Values:

cbr: Constant Bit Rate. The CBR class of traffic is used by connections that require a constant and guaranteed cell rate during the lifetime of the connection. The sampling time for CBR is constant, with no delay. Cells exceeding the provisioned PCR rate are discarded.

CBR would be appropriate for real-time application, such as voice and video applications.

ubr: Unspecified Bit Rate. The UBR class of traffic does not specify traffic-related guarantees. No numerical commitments are made with respect to the cell loss ratio (CLR) experienced by the connection, or the cell transfer delay (CTD) experienced by the cells. With UBR service, the available bandwidth is fairly distributed to the active UBR subscribers.

UBR would be appropriate for delay-tolerant or non-real-time applications, such as data application.

Compensated

CBR compensation mode. Sometimes CBR access will be skipped after OLT and ONU exchanged GPON OAM messages. If you select true in compensated mode, CBR access can be compensated immediately after exchange the GPON OAM messages to prevent possible jitter of the CBR channel.

Values:

false

true

Shared

Allows GEM ports to share upstream bandwidth.

The system supports up to 384 DBA Alloc-Ids per GPON physical port, and 768 Alloc-Ids per GPON physical port (including static and DBA).

Multiple GEM ports can share a single Alloc-Id if:

  • the GEM ports use the same traffic profile

  • the traffic profile has sharing enabled

  • The GEM ports are under the same ONU

Values:

false

true

Dynamic Bandwidth Allocation

Whether Dynamic Bandwidth Allocation (DBA) is enabled.

Values:

True

False

Fixed Upstream UBR Bandwidth(kB)

Fixed UBR bandwidth used when DBA is enabled.

The minimum values of Fixed Ubr bandwidth can be 0 or 128 Kbps. The maximum value is 1,048,576 Kbps.

Only multiples of 64 Kbps are allowed.

Default: 0

Fixed Upstream CBR Bandwidth(kB)

Fixed CBR bandwidth used when DBA is enabled.

The minimum value of Fixed Cbr bandwidth can be 0 or 512 Kbps. The maximum value is 454,208 Kbps.

Only multiples of 64 Kbps are allowed.

Default: 0

Assured Upstream Bandwidth(kB)

DBA Assured bandwidth will be allocated when traffic

demand exists. The minimum value of Assured bandwidth can be 0 or 256 Kbps. The maximum value is 1,048,576 Kbps.

Only multiples of 64 Kbps are allowed.

Default: 0

Maximum Upstream Bandwidth(kB)

Use this parameter to indicate the amount of non-guaranteed bandwidth configured for the traffic profile.

The non-guaranteed class of service can be either nonassured or besteffort type of service, which is specified in the Extra Upstream Bandwidth Type field.

The value of the non-guaranteed bandwidth can be computed using the configured value in this parameter minus the sum of the Fixed Upstream UBR BandwidthFixed Upstream CBR Bandwidth and Assured Upstream Bandwidth

The configured value in this parameter has to be greater than or equal to sum of the Fixed Upstream UBR BandwidthFixed Upstream CBR Bandwidth and Assured Upstream Bandwidth

If the configured value is equal to the sum of the Fixed Upstream UBR Bandwidth Fixed Upstream CBR Bandwidth Assured Upstream Bandwidth, then no bandwidth is assigned to non-guaranteed type of service.

The maximum value is 1,048,576 Kbps.

Only multiples of 64 Kbps are allowed.

Default: 0

Extra Upstream Bandwidth Type

The priority type of non-guaranteed bandwidth.

Default: nonassured

Values:

nonassured

Nonassured has higher priority for getting unused bandwidth than besteffort.

besteffort

Besteffort has the lowest priority.

Video

Multicast Control List

Defines which multicast addresses the remote end video can access. A multicast control list entry of 0 enables subscriptions up to the number of maximum video streams on the interface with control list checking.

Maximum Video Stream

The maximum number of IP video streams from the IP interface record. A multicast control list entry of 0 enables subscriptions up to the number of maximum video streams on the interface with control list checking.

After configuring the physical interface, configure the bridging interface.

 

SHDSL Card

Slot Displays the slot number and the card description.

Port SHDSLBONDED

Check for EFM bonding. Check for N2N bonding.

After selecting the BOND group, configure the bridging interface.

 

T1 Bonded Card

Slot Displays the slot number and the card description.

Port DS1BONDED

Check for EFM bonding. Check for N2N bonding.

After selecting the BOND group, configure the bridging interface.

 

VDSL

Slot Displays the slot number and the card description.

Port VDSL2

VDSLBONDED

VCL

VPI

The VPI for this VCL. This must match the remote end of the connection.

VCI

The VCI for this VCL. This must match the remote end of the connection.

After configuring the physical interface, configure the bridging interface.

 

Bridge settings

Packet Type

PTM

Packet Transfer Mode

ATM

Asynchronous Transfer Mode

Connection Type

Logical Type

Downlink 802.1Q: A downlink bridge is used in conjunction with an uplink bridge. where the uplink bridge is the path upstream to the network, and the downlink bridge is the learning interface facing subscribers. Traffic coming into this interface is forwarded to the uplink regardless of the destination MAC address. Broadcasts and unicasts (known and unknown) will be sent out the default interface, which is the uplink bridge for the VLAN.

Packets entering the system on this interface have their source MAC addresses learned and associated with this interface. Because this interface is not a default, it is required to learn MAC addresses, so that frames from the network that come in on the uplink bridge can be sent to the correct downlink bridge. Broadcasts received on a downlink are sent to the uplink (default) without filtering. Broadcasts will not flow to other downlinks as long as forwardtodefault parameter is set to true. Downlink ports learn MAC addresses.

Intralink: An intralink bridge is used in conjunction with an uplink bridge, where the uplink bridge is the path upstream to the network, and the intralink forwards traffic with unknown MAC addresses or multicasts to the configured bridge interface without attempting to learn the addresses of the attached devices or network. Traffic coming into this interface is forwarded to the uplink regardless of the destination MAC address. Broadcasts, multicasts, and unicasts (known and unknown) will be sent out the default interface, which is the uplink bridge for the VLAN.

Packets entering the system on this interface will not have their source MAC addresses learned since this interface is not used when a MAC is known.

Intralink bridge interfaces require an additional configuration to take effect, which is a bridge-path. The bridge-path sets a default intralink path for either a specific VLAN or a global intralink for the system onto the intralink bridge. If an intralink is missing this configuration, traffic will not flow across the asymmetric VLAN.

Secured

Check to activate secure DHCP settings on downlink bridges to prevent users with a statically configured IP address or MAC address from bypassing DHCP security enforcement. This filter blocks users from accessing the network using anything other than valid DHCP offered IP address.

When packets are received or sent out a secure downlink bridge interface, TLS subscriber facing bridge interface, or GPON port and VLAN, the system checks the IP address or MAC address against the dynamic IP bridge filter. If a match is found (the address was provided by the DHCP server), the packet is allowed to pass through the filter. Otherwise, it is blocked.

For GPON ports, adding secure to one VLAN ID will secure the entire port and all bridges configured on that port with the same VLAN ID.

Q-in-Q

For SLAN configurations. Check to enable.

QoS

Check to enable.

 
Note: VLAN translation and VLAN translation and promotion is supported on Ethernet (single-slot only), GPON ONUs and OLTs, EFM T1/E1 bond groups, and VDSL2.
 
When configuring bridges for VLAN/SLAN translation, all network facing Ethernet ports must be tagged or stagged and all bridges facing the subscriber’s CPE must be tagged or stagged. Bridges that are untagged do not support translation. For VLAN translation to work, there must be a VLAN or VLAN/SLAN in the Ethernet packet when it arrives at the device from the subscriber.
 
Note: Typically downlink bridges are untagged as many downstream devices do not expect or recognize VLAN IDs

VLAN Tagging and Translation

Type

Untagged, single tagged, or double-tagged.

Tagged bridging: Tagged bridges forward traffic based on the logical VLAN ID number. This tagging allows the segregation of a single Ethernet network into multiple virtual network segments.

Untagged bridging: Untagged bridges forward traffic based on MAC addresses but do not further segregation traffic. Traffic is broadcast over the Ethernet port and is either accepted or rejected based on the destination MAC address. In other words, there is no VLAN tagging; all ports are learning and forwarding without restriction without broadcast suppression. Forwarding to a default port is not allowed.

Double-tagged: Double tagging expands the VLAN space in the Ethernet frame, so that you may further segregate traffic. The packet is differentiated by VLAN ID and SLAN ID. This second tag gives a whole other layer, so you can have VLAN 100 which may be a department in a global organization, and VLAN 100, SLAN 100 be one group within that department.

VLAN ID

The Virtual LAN Identifier for the IP Interface. If the VLAN ID specified is non-zero, all traffic destined to this interface should be configured with this VLAN ID.

MVR VLAN ID

The Multicast Vlan Registration (MVR) VLAN ID. MVR allows video subscribers to share one multicast VLAN in the network while remaining in their own unique VLAN. MVR can send packets received from the multicast headend device on one MVR VLAN to one or more than one subscriber VLAN IDs.

Translate to VLAN ID

 

Valid range: 1-4090

 

QoS

VLAN CoS

Specifies the value loaded into the COS field of the VLAN header when an untagged packet received on this interface is tagged (VLAN ID inserted) for bridging. Value range is 0 to 7. Default is 0.

S-Tag CoS

The s-tag COS to be used when doing s-tag insertion.

Default is 0

Outgoing CoS Option

Determines COS setting on packets bridged out this interface

disable - COS setting is untouched.

all - COS will be set to Outgoing CoS Value.

Default is disable

Outgoing CoS Value

The COS value loaded into outgoing tagged packets.

Applicable only if interface sends tagged packets and Outgoing CoS Option is set to all.

S-Tag Outgoing CoS Option

Determines s-tag COS settings on packets bridged out this interface:

disable - s-tag COS setting just passed as Rxed.

all - s-tag COS will be set with Outgoing CoS Value

Default is disable

S-Tag Outgoing CoS Value

The s-tag COS value loaded into outgoing tagged packets.

 Applicable only if interface sends S-tagged packets and S-Tag Outgoing CoS Option is All.

Default is 0

 

Q-in-Q S-TAG And Translation

S-TAG TPID

Identifies the type of VLAN ID used. Typically set to 8100.

S-TAG ID

Specifies the SLAN ID assigned to an Ethernet frame.

Translate To S-Tag ID

Valid range: 1-4090

 

Packet Rule Group

Ingress Group Index

The index number for packet-rule-record(s) when adding multiple filters for ingress interfaces.

Egress Group Index

The index number for packet-rule-record(s) when adding multiple filters for egress interfaces.

Static Paths

Unicast Aging

Unicast aging period in tenths of seconds for the specified VLAN. After the specified aging period is met, the VLAN address is deleted from the routing table. A value of 0 indicates that aging is turned off. Maximum value is 2147483647 tenths of seconds, which equates to approximately 2485.51 days.

Flap Control

Enables or disables Flap Control in the Bridge Filter Table.

Values:

Disable: turns Flap Control mode off.

Enable applies a hold time of 60 seconds before allowing addr/IP to be moved to a new port.

Fast indicates that as a MAC address comes into the system from one source and then is seen from another source, the MAC address table is purged from the first source and replaced with the second source without delay or restriction. If this behavior is not desired, the Flap Mode can be configured to disabled or default.

Default: indicates 'Don't Care' and defaults to disabled or enable as set by another entry.

Loop Prevention

Bridge loop issue prevention can be configured on both asymmetrical and TLS bridges to resolve certain incorrect MAC address behaviors.

BlockAsym: blocks a learning bridge if flap is detected between it and an uplink bridge. Setting this on an an uplink bridge interface on the VLAN ID will block the downlink when incorrect MAC address behavior occurs in a uplink/downlink configuration. When incorrect MAC address behavior involves two downlinks, the bridge interface on the VLAN ID for both downlinks is blocked.

BlockAll: incorporates blockAsym but it also blocks a learning bridge if it flaps against another learning bridge.

To save the configuration, click the Apply button.

 

May 14, 2012