Network Router User Manual
Table Of Contents
- Notices
- Contents
- About This Manual
- Introduction
- Hot Swapping Line Cards and Control Modules
- Bridging Configuration Guide
- Bridging Overview
- VLAN Overview
- Configuring SSR Bridging Functions
- Monitoring Bridging
- Configuration Examples
- SmartTRUNK Configuration Guide
- ATM Configuration Guide
- Packet-over-SONET Configuration Guide
- DHCP Configuration Guide
- IP Routing Configuration Guide
- IP Routing Protocols
- Configuring IP Interfaces and Parameters
- Configuring IP Interfaces to Ports
- Configuring IP Interfaces for a VLAN
- Specifying Ethernet Encapsulation Method
- Configuring Jumbo Frames
- Configuring Address Resolution Protocol (ARP)
- Configuring Reverse Address Resolution Protocol (RARP)
- Configuring DNS Parameters
- Configuring IP Services (ICMP)
- Configuring IP Helper
- Configuring Direct Broadcast
- Configuring Denial of Service (DOS)
- Monitoring IP Parameters
- Configuring Router Discovery
- Configuration Examples
- VRRP Configuration Guide
- RIP Configuration Guide
- OSPF Configuration Guide
- BGP Configuration Guide
- Routing Policy Configuration Guide
- Route Import and Export Policy Overview
- Configuring Simple Routing Policies
- Configuring Advanced Routing Policies
- Multicast Routing Configuration Guide
- IP Policy-Based Forwarding Configuration Guide
- Network Address Translation Configuration Guide
- Web Hosting Configuration Guide
- Overview
- Load Balancing
- Web Caching
- IPX Routing Configuration Guide
- Access Control List Configuration Guide
- Security Configuration Guide
- QoS Configuration Guide
- Performance Monitoring Guide
- RMON Configuration Guide
- LFAP Configuration Guide
- WAN Configuration Guide
- WAN Overview
- Frame Relay Overview
- Configuring Frame Relay Interfaces for the SSR
- Monitoring Frame Relay WAN Ports
- Frame Relay Port Configuration
- Point-to-Point Protocol (PPP) Overview
- Configuring PPP Interfaces
- Monitoring PPP WAN Ports
- PPP Port Configuration
- WAN Configuration Examples
- New Features Supported on Line Cards

SmartSwitch Router User Reference Manual 61
Chapter 6: Packet-over-SONET Configuration Guide
To manage the working and protecting PoS interfaces, enter the following commands in
Configure mode:
Note:
You can only specify one option, lockoutprot, forced or manual, for a port. Also,
an option can be applied to either the working port or the protecting port, but not
both working and protecting ports at the same time.
To return the circuit to the working interface after the working interface becomes
available, enter the following commands in Configure mode:
Specifying Bit Error Rate Thresholds
If the bit error rate (BER) on the working line exceeds one of the configured thresholds, the
receiver automatically switches over to the protecting line.
BER is calculated with the following:
BER = errored bits received/total bits received
The default BER thresholds are:
• Signal degrade BER threshold of 10
-6
(1 out of 1,000,000 bits transmitted is in error).
Signal degrade is associated with a “soft” failure. Signal degrade is determined when
the BER exceeds the configured rate.
Prevent a working interface from switching to a
protecting port. This command can only be applied
to a port configured as a protecting port.
sonet set <port> protection-switch
lockoutprot
Force a switch to the specified port. This command
can be applied to either the working or protecting
port.
sonet set <port> protection-switch
forced
Manually switch the line to the specified port. This
command can be applied to either the working or
protecting port.
sonet set <port> protection-switch
manual
Enable automatic switchover from the protecting
interface to the working interface after the working
interface becomes available. This command can only
be applied to a protecting port.
sonet set <port> reverting
revertive|nonrevertive
Sets the number of minutes after the working
interface becomes available that automatic
switchover from the protecting interface to the
working interface takes place. The default value is 5
minutes.
sonet set <port> WTR-timer <minutes>