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Cisco Cisco 1700 2600 3600 3700 Series VPN Module White Paper

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© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. 
Page 9 of 55 
An example of how configuration checking may force the system into RPR mode is provided in the following output: 
*Jun 29 14:05:44.731: %VSLP-SW2_SP-5-RRP_ROLE_RESOLVED: Role resolved as ACTIVE 
by VSLP 
*Jun 29 14:05:44.735: %VSL-SW2_SP-5-VSL_CNTRL_LINK: vsl_new_control_link NEW VSL 
Control Link 5/4  
*Jun 29 14:05:44.735: %VSL-SW2_SP-2-VSL_STATUS: === VSL is UP  
*Jun 29 14:08:22.294: %VS_PARSE-3-CONFIG_MISMATCH: The system:/running-config VSL 
config comparison failed  
Switch 2 has the following configs that mismatch with Switch 1:  
Interface TenGigabitEthernet1/5/4 shutdown  
*Jun 29 14:08:22.210: SW2_SP: VS_PARSE_DBG_ERR: vs_redun_send_check_vs_config: 
icc_req_resp_timeout_and_success: Failed  
*Jun 29 14:08:22.210: SW2_SP: VS_PARSE_DBG: vs_redun_check_vs_config: running 
config check on rp not ok  
*Jun 29 14:08:22.218: %PFREDUN-SW2_SP-6-ACTIVE: Standby initializing for RPR mode  
 
This output shows that the configuration consistency check failed because of a mismatch in the VSL configuration 
between Switch 1 and Switch 2. In this case, Switch 2 has an extra “shutdown” statement under one of its VSL 
members, whereas Switch 1 does not, forcing the standby virtual switch (in this case, Switch 1) into RPR mode. 
In order to recover from this situation, make the necessary changes to the configuration, save the configuration, 
and reload the standby chassis: 
vss#conf t  
Enter configuration commands, one per line. End with CNTL/Z.  
vss(config)#int te1/5/4  
vss(config-if)#no shut  
vss(config-if)#^Z  
vss#wr  
Building configuration...  
*Jun 29 14:28:53.906: %SYS-5-CONFIG_I: Configured from console by console  
*Jun 29 14:29:04.834: %PFINIT-SW2_SP-5-CONFIG_SYNC: Sync’ing the startup 
configuration to the standby Router. [OK]  
vss#redundancy reload shelf 1  
Reload the entire remote shelf[confirm]  
Preparing to reload remote shelf  
Upon reload of Switch 1, configurations are now synchronized and both switches can enter into NSF/SSO mode: 
*Jun 29 14:40:46.101: VS_PARSE_DBG: vsl_mgr_parse_config_file: 
vsl_mgr_parse_config_file:Open Succeeded for running config system:/running-
config 
*Jun 29 14:40:46.029: SW2_SP: VS_PARSE_DBG: vs_redun_check_vs_config: running 
config check on rp ok 
*Jun 29 14:40:46.037: %PFREDUN-SW2_SP-6-ACTIVE: Standby initializing for SSO mode 
*Jun 29 14:40:49.874: %PFINIT-SW2_SP-5-CONFIG_SYNC: Sync’ing the startup 
configuration to the standby Router.