Supported Platforms
Related Documentation
- EX Series
- For information about configuring NSB on EX Series switches that do not support the Enhanced Layer 2 Software (ELS) CLI style, see Configuring Nonstop Bridging on EX Series Switches (CLI Procedure)
- EX Series, QFX Series standalone switches
- For information about configuring NSB on EX Series switches that support ELS, see Configuring Nonstop Bridging on Switches (CLI Procedure)
Understanding Nonstop Bridging on EX Series Switches
You can configure nonstop bridging (NSB) to provide resilience for Layer 2 protocol sessions on a Juniper Networks EX Series Ethernet Switch or on an EX Series Virtual Chassis with redundant Routing Engines.
NSB operates by synchronizing all protocol information for NSB-supported Layer 2 protocols between the master and backup Routing Engines. If the switch has a Routing Engine switchover, the NSB-supported Layer 2 protocol sessions remain active because all session information is already synchronized to the backup Routing Engine. Traffic disruption for the NSB-supported Layer 2 protocol is minimal or nonexistent as a result of the switchover. The Routing Engine switchover is transparent to neighbor devices, which do not detect any changes related to the NSB-supported Layer 2 protocol sessions on the switch.
For a list of the EX Series switches and Layer 2 protocols that support NSB, see EX Series Switch Software Features Overview and EX Series Virtual Chassis Software Features Overview.
 | Note: Nonstop bridging provides a transparent switchover mechanism only for Layer 2 protocol sessions. Nonstop active routing (NSR) provides a similar mechanism for Layer 3 protocol sessions. See Understanding Nonstop Active Routing on EX Series Switches. |
Related Documentation
- EX Series
- For information about configuring NSB on EX Series switches that do not support the Enhanced Layer 2 Software (ELS) CLI style, see Configuring Nonstop Bridging on EX Series Switches (CLI Procedure)
- EX Series, QFX Series standalone switches
- For information about configuring NSB on EX Series switches that support ELS, see Configuring Nonstop Bridging on Switches (CLI Procedure)
Published: 2014-04-25
Supported Platforms
Related Documentation
- EX Series
- For information about configuring NSB on EX Series switches that do not support the Enhanced Layer 2 Software (ELS) CLI style, see Configuring Nonstop Bridging on EX Series Switches (CLI Procedure)
- EX Series, QFX Series standalone switches
- For information about configuring NSB on EX Series switches that support ELS, see Configuring Nonstop Bridging on Switches (CLI Procedure)
