Cisco 10000-2P2-2DC Software Guide - Page 331

Chapter 14 Configuring Automatic Protection Switching Single-router Automatic Protection Switching Monitoring and Maintaining the MR-APS Configuration To monitor and maintain the configuration of MR-APS, enter any of the following commands in privileged EXEC mode: Command Router# show aps Router# debug aps Router(config-if)# aps force circuit-number (unchannelized line cards) or Router(config-controller)# aps force circuit-number (channelized line cards) Router(config-if)# aps manual circuit-number (unchannelized line cards) or Router(config-controller)# aps manual circuit-number (channelized line cards) Router# aps lockout [POS | SONET] slot#/subslot#/port# Purpose Displays about APS-configured interfaces. Displays debugging information related automatic protection switching. Manually switches the specified circuit to a protect interface, unless a request of equal or higher priority is in effect. circuit-number is the number of the circuit to switch to the protect interface. Note This command has no effect if the protection channel is already the active channel. Manually switches a circuit to a protect interface. Prevents a channel from automatically switching to the active, working, or protection state. Caution Because debugging output is assigned high priority in the CPU process, it can render the system unusable. For this reason, use debug commands only to troubleshoot specific problems or during troubleshooting sessions with Cisco Systems technical support personnel. Moreover, it is best to use debug commands during periods of lower network traffic and fewer users. Debugging during these periods decreases the likelihood that increased debug command processing overhead will affect system use. Single-router Automatic Protection Switching The Cisco 10000 series router supports SONET Single-router Automatic Protection Switching (SR-APS) redundancy for the OC-3 ATM, OC-12 ATM, OC-12 POS, 6-port OC-3 POS, channelized OC-12, and channelized 4-port STM-1 line cards. The following types of SR-APS are supported: • SR-APS 1+1 support for line cards with a single port (such as the OC-12 POS) is card-to-card. When the active line card fails, the redundant line card takes over. • SR-APS 1:1 support for line cards with multiple ports (such as the OC-3 POS) is port-to-port. The PRE transmits data to both the active and the redundant line card. When a port fails on the active line card, the corresponding port on the redundant line card takes over. In addition to port failovers, multiple port line cards support line card failover. If the working card fails, the protect card becomes active and all ports on that card are active. OL-2226-23 Cisco 10000 Series Router Software Configuration Guide 14-27