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Crash When "ip dhcp-relay fwd-path" Entered For VLAN VRRP Interface Without "ip dhcp-relay" Configured

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TitleCrash When "ip dhcp-relay fwd-path" Entered For VLAN VRRP Interface Without "ip dhcp-relay" Configured
Symptoms
  • Switch crashes when VRRP ip address entered as agent ip address in DHCP relay config when in global context
VSP:1(config)#interface vlan 701
VSP:1(config-if)#ip address 10.1.7.251 255.255.255.0 13 
VSP:1(config-if)#ip vrrp version 2 
VSP:1(config-if)#ip vrrp address 10 10.1.7.1
VSP:1(config-if)#ip vrrp 10 backup-master enable
VSP:1(config-if)#ip vrrp 10 priority 180
VSP:1(config-if)#ip vrrp 10 enable
VSP:1(config-if)#exit
VSP:1(config)#ip dhcp-relay fwd-path 10.1.7.1 10.1.7.10
CP1  [05/29/20 23:33:34.000] LifeCycle: WARNING: Critical process is dying (pid:1878)!
CP1  [05/29/20 23:33:34.000] LifeCycle: INFO: Turning off s/w watchdog ...
CP1  [05/29/20 23:33:34.000] LifeCycle: INFO: Setting shutdown countdown to 600 seconds
CP1  [05/29/20 23:33:34.000] LifeCycle: INFO: Stopping all  processes
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Stopped all  processes
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Starting persistent memory archive
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Persistent archive lock acquired
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Persistent memory archive file created
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Persistent memory archive file name: /intflash/PMEM/1/pmem.20200529233338.1.tar.gz
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Persistent memory archive completed
CP1  [05/29/20 23:33:38.000] LifeCycle: INFO: Crash reporter installed for this process, dumping data

Lifecycle Crash Reporter: Process Name: cbcp-main.x, Thread Name: tShell-cli, Signal: 11, Slot: 1, PID 1878, LWP: 2961
[bt] Execution path:
[bt] /opt/appfs/lib/cp/libndlcs.so.1(_Z30nd_lcs_crash_exception_handleriP9siginfo_tPv+0x150)[0x9a6d2ec]
[bt] linux-vdso32.so.1(__kernel_sigtramp_rt32+0x0)[0x1003f0]
[bt] cbcp-main.x(rcIpDhcpForwardTblConsistencyCheck+0x70c)[0x10beee14]
[bt] cbcp-main.x(rcIpDhcpForwardTblConsistencyCheck+0x3a4)[0x10beeaac]
[bt] cbcp-main.x(rcIpDhcpCliFwdPathCreate+0x1fc)[0x10bf4088]
[bt] /opt/appfs/plat/lib/cp/libnncli.so.1(global_configurationipdhcp_da_relayFunc+0x204)[0xc56dbfc]
[bt] /opt/appfs/plat/lib/cp/libnncli.so.1(+0xa3d10)[0xc52ed10]
[bt] /opt/appfs/plat/lib/cp/libnncli.so.1(nncli_executeTree+0x494)[0xc52f3f0]
[bt] /opt/appfs/plat/lib/cp/libnncli.so.1(nncli_executeTree+0x47c)[0xc52f3d8]
[bt] /opt/appfs/plat/lib/cp/libnncli.so.1(nncli_execute_line+0x1d8)[0xc52f654]
[bt] /opt/appfs/plat/lib/cp/libnncli.so.1(nncli_execute_cli+0x728)[0xc530408]
[bt] /opt/appfs/plat/lib/cp/libnncli_parser.so.1(start_nncli+0x4f4)[0xc935378]
[bt] /opt/appfs/lib/cp/libv2l.so.1(task_wrapper+0x2e8)[0x978e130]
[bt] cbcp-main.x(ckrmThreadStarter+0x648)[0x118a37e4]
[bt] /lib/libpthread.so.0(+0x6f20)[0x8e32f20]
[bt] /lib/libc.so.6(clone+0x78)[0x89d4c80]
  • Issue not present in 8.1.2.0 release
Environment
  • VSP 7254XSQ
  • Release 8.1.5.0
Cause
Software defect VOSS-18015
Resolution
  • Resolved in 8.1.7 release
Workaround
  • Configure DHCP relay in VLAN interface context
VSP:1(config)#interface vlan 701
VSP:1(config-if)#ip dhcp-relay fwd-path 172.27.0.10
VSP:1(config-if)#ip dhcp-relay fwd-path 172.27.0.10 enable

 
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