 N-TRON® Static Filters for Ring Protocols
Our proprietary ring healing technology provides superior fast heal times for redundant ring topologies. However, the technology used by most proprietary ring managers will create additional Ethernet traffic on the ring. These frames are referred to as Self Health Packets (SHPs) and are required in order for the Ring Manager to determine the health state of the ring.
N-Tron's N-Ring technology transmits multicast packets (0107af00ded1 & 0107af00def0) from both ring ports on the Ring Manager. This method is to help protect against a single fiber strand failure. When using all N-Ring capable switches in the Ring, the Auto Ring Members will dynamically configure static filters to prevent the Self Health Packets from being flooded to the devices connected to the switch without manual static filter configuration being required.
For topologies where the redundant ring includes switches that do not natively support proprietary ring healing technology, we recommend the use of managed switches that allow configuration of static filters for 0107af00ded1 and 0107af00def0 addresses. The use of un-managed switches as ring nodes is not recommended because they do not provide the means to prevent the Ring Manager's Self Health Packets from egressing/flooding to the non-ring switch ports and devices. This may be more of a concern when connecting lower bandwidth wireless/radio equipment to nodes within the ring. Most managed switches, such as our 500 Series, when purchased with the Advanced Management Firmware (-A) option, allow for static filters to be configured on a port to port basis.
Configuring a 508FX2-A with Static Filters for use with N-Tron's N-Ring Technology
Note: 508FX2-A switches with firmware 9.00 and above are preconfigured with N-Ring SHP filters enabled by default.
600 Series Ring Manager
When using N-Tron's 600 Series to manage the fiber ring, we recommend the use of managed switches that allow configuration of static filters. The use of un-managed switches as ring nodes is not recommended because they do not provide the means to prevent the Ring Manager's Self Health Packets (018063070001) from egressing/flooding to the non-ring switch ports and devices. This may be more of a concern when connecting lower bandwidth wireless/radio equipment as nodes within the ring. Most managed switches, such as our 500 Series when purchased with the Advanced Management Firmware (-
A) option allow for static filters to be configured on a port to port basis.
When connecting two or more rings together using copper ports on the 600 Series Ring Managers, no manual filter configuration is required. In the event the two rings are connected together via ring member switches, the ring member switches must be similar to our 500 Series when purchased with the Advanced Management Firmware (-A) option - which allow configuration of static filters.
Configuring a 508FX2-A with Static Filters for use with N-Tron's 600 Series Ring Managers
Note: 508FX2-A switches with firmware 9.00 and above are preconfigured with 600 Series SHP filters enabled by default.
The information in this white paper was first published by N-TRON. In an effort to bring out customers the best possible information, B&B Electronics has received permission to republish this document. B&B Electronics thanks N-TRON for allowing us to distribute this information to our customers. You can visit their site at http://www.n-tron.com.
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