General information
The MA5160 is a modular OLT in an 11U form factor for a standard 19" rack. Here are the types of modules for this device:
- FC64 control boards, which coordinate the operation of the modular system and connect the OLT to the provider's upstream network;
- Line cards with PON interfaces, used to connect ONT subscriber terminals. There are multiple types of line cards:
- LC16G is a line card that contains only GPON interfaces;
- LC16XG is a line card that has XGS-PON interfaces capable of operating in either XGS-PON or GPON mode. The PON port operating mode is specified separately for each interface. For example, within a single card, one port can operate in GPON mode, while another port can operate in XGS-PON mode. The operating mode of the PON ports is specified in the slot settings.
- LC16C (currently under development) is a linear card that contains combo PON interfaces, which makes it possible to simultaneously connect ONTs operating on both GPON and XGS-PON technologies to PON interfaces using specific SFP modules in the OLT that are capable of operating in combo mode. The operating mode of PON ports for boards of this type is non-configurable and has the combo value.
The installation of two control modules allows for switch redundancy and increased system throughput. The modules operate in stacking mode (module interfaces are combined into trunk groups using LAG and LACP). All modules share a single control interface. All line and control modules are connected to each other inside the chassis using high-speed buses.
The key advantage of this device is its high subscriber capacity combined with the variability of technologies used for subscriber connections. From the point of view of architecture, one line card replaces one pizza-box OLT. For example, the LC16G card is identical in architecture and functionality to the pizza-box LTP-16N OLT, and the LC16XG is identical to the LTX-8 OLT.
Connection diagram
Let's take a look at a connection diagram similar to the one discussed in the Configuring and health checking the equipment (XGS-PON diagram) section. The diagram specifies the use of LC16XG as the line card. The initial data is similar:
- VLAN 2149 – Internet service;
- VLAN 30 – IPTV service;
- VLAN 100 – network hosts management.
According to this diagram, for NTX-1, the subscriber router is supposed to be connected directly to the ONT. In the case of NTX-SFP-100, the ONT in the SFP module form factor is supposed to be connected to an access switch. VLAN processing modes for NTX-1 are access, for NTX-SFP-100 – trunk.
OLT and ONT configuration procedure in CLI
The configuration approach has some syntactic differences from the LTX series OLTs due to the modular architecture of the MA5160 device.
Two segments will be covered: connection of one subscriber with an installed home router via ONT and connection of an access switch with multiple subscribers via NTX-SFP. The configuration of the third segment according to the diagram, which uses an NTX-1F ONT with Ethernet SFP connectivity, will not be considered, as this ONT model can be configured similarly to NTX-1 or NTX-SFP-100.
The initial configuration of the OLT in terms of network connection management settings can be performed via the OOB interface or via the console interface. For more details on configuring management parameters, refer to the OLT user documentation. Here is the xample of configuring OLT management parameters for this scheme:
Please note. Front-port uplink interfaces have double indexes, for example, front-port 1/1. The first index is the control board unit number, and the second is the port number on the control board. Unit number 1 corresponds to the left control board, and 2 corresponds to the right control board. Thus, front-port 1/1 is the first port on the left control board.
On MA5160, the confirm command is used to confirm the changes made in the configuration (unlike LTX, where the save command is used).
NTX-1 configuration details:
- configuration identifier is interface ont 1/1/1;
- both services (Internet + IPTV) are provided at the egress of LAN port in untagged mode;
- both LAN interfaces are configured in case the subscriber needs to use several LAN ports of the ONT;
- given the specifics of the services, only one cross-connect service profile is configured for both services.
NTX-SFP-100 configuration details:
- configuration identifier is interface ont 1/1/2;
- both services (Internet + IPTV) are provided on the uplink port of the access switch in tagged mode;
- the device has a single internal Ethernet interface for communication with the switch port to which the NTX-SFP is connected. For OLT, this interface has the LAN 1 identifier, so only one LAN port will be configured for NTX-SFP;
- each service is assigned its own cross-connect profile;
- a separate service with a configured management VLAN of the provider's data transmission network is used to control the switch to which the NTX-SFP (or NTX-1F) is connected.
Please note. Triple indexes are used to designate ONT interfaces, where the first value corresponds to the line card number, the second to the pon-port number on the specified line card, and the third to the ONT identifier on the link. Accordingly, pon-port interfaces in the OLT configuration will have double indexes consisting of the line card number and the port number on the card.
Configuring basic functionality
Configuring cross-connect service profiles
The principle of configuring cross-connect service profiles on the MA5160 is no different from LTX.
Configuring the ports service profiles
The principle of configuring ports service profiles on the MA5160 is no different from LTX.
Configuring VLAN, IGMP snooping and IGMP proxy on OLT
The principle of configuring the ports service profiles on MA5160 is generally similar to LTX, with a few exceptions. IGMP snooping must be enabled both globally (on the control boards) and on the slots (line boards). IGMP proxy report is configured only on the slots.
Registering line cards and activating ONTs
Registering line cards, changing the pon-type on pon-port interfaces
When connecting line cards, the type of line card must be specified manually in the configuration. It is also necessary to specify the pon-type on the pon-port interface to which the ONTs will be connected.
By default, all pon-port interfaces on line cards are configured for GPON mode. This applies even to XGS-PON line cards. Therefore, it is necessary to change the pon-port type to connect an XGS-PON ONT.
Registering ONT on OLT and assigning the configuration to the ONT
The procedure for registering and applying the configuration to the ONT is similar to LTX.
Checking PON services operation
Performed similarly to LTX. Verification of service operation is described in the Configuring OLT and ONT in CLI (XGS-PON diagram) section.