Symptom

When span destination interface goes down, the NP locks up on span source interface. Span source and destination interfaces are on different NP/LCs. monitor-session SPAN ethernet destination interface HundredGigE0/2/0/0 <<< This interface goes down ! interface HundredGigE0/2/0/0 transceiver permit pid all l2transport ! interface HundredGigE0/0/0/0 mtu 9216 service-policy output QOS carrier-delay up 3000 down 20 load-interval 30 dampening ! interface HundredGigE0/0/0/0.33 <<< This interface NP locks up ipv4 mtu 9100 ipv4 address x.x.x.x 255.255.255.252 ipv4 tcp-mss-adjust enable ipv6 mtu 9100 ipv6 address zzzz:zzzz:zzzz:zzzz::z/127 monitor-session SPAN ethernet ! load-interval 30 flow ipv4 monitor netflow_v4 sampler sample ingress flow ipv6 monitor netflow_v6 sampler sample ingress encapsulation dot1q 33 ! RP/0/RSP0/CPU0:513E-B.35-ASR-9006-AC-V2-1#LC/0/2/CPU0:Dec 2 20:30:27.584 UTC: ifmgr[216]: %PKT_INFRA-LINK-3-UPDOWN : Interface HundredGigE0/2/0/0, changed state to Down LC/0/2/CPU0:Dec 2 20:30:27.584 UTC: ifmgr[216]: %PKT_INFRA-LINEPROTO-5-UPDOWN : Line protocol on Interface HundredGigE0/2/0/0, changed state to Down LC/0/2/CPU0:Dec 2 20:30:29.015 UTC: vic_0_0[390]: %PLATFORM-VIC-4-SIGNAL : Interface HundredGigE0/2/0/0, Detected Signal failure LC/0/0/CPU0:Dec 2 20:30:39.618 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Set|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/2/CPU0:Dec 2 20:30:42.567 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_0_LOW_RX_POWER_ALARM : Set|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/2/CPU0:Dec 2 20:30:42.567 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_1_LOW_RX_POWER_ALARM : Set|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/2/CPU0:Dec 2 20:30:42.567 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_2_LOW_RX_POWER_ALARM : Set|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/2/CPU0:Dec 2 20:30:42.568 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_3_LOW_RX_POWER_ALARM : Set|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/0/CPU0:Dec 2 20:30:54.301 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Clear|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/0/CPU0:Dec 2 20:31:07.323 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Set|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/0/CPU0:Dec 2 20:31:22.013 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Clear|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/0/CPU0:Dec 2 20:31:35.035 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Set|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/0/CPU0:Dec 2 20:31:49.615 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Clear|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/2/CPU0:Dec 2 20:31:51.939 UTC: vic_0_0[390]: %PLATFORM-VIC-4-BER_SF_ALARM : port: 0, SF-BER, status: set LC/0/2/CPU0:Dec 2 20:31:52.029 UTC: ifmgr[216]: %PKT_INFRA-LINK-3-UPDOWN : Interface HundredGigE0/2/0/0, changed state to Up LC/0/2/CPU0:Dec 2 20:31:52.029 UTC: ifmgr[216]: %PKT_INFRA-LINEPROTO-5-UPDOWN : Line protocol on Interface HundredGigE0/2/0/0, changed state to Up LC/0/2/CPU0:Dec 2 20:31:52.082 UTC: vic_0_0[390]: %PLATFORM-VIC-4-BER_SF_ALARM : port: 0, SF-BER, status: cleared LC/0/0/CPU0:Dec 2 20:32:02.637 UTC: pfm_node_lc[305]: %PLATFORM-NP-2-NP_DIAG : Set|prm_server_to[163922]|0x1008000| NP diagnostics warning on NP0. LC/0/0/CPU0:Dec 2 20:32:02.638 UTC: prm_server_to[318]: %PLATFORM-NP-0-LC_RELOAD : NP0 had 3 fast resets within an hour, initiating NPdatalog collection and automatic LC reboot RP/0/RSP1/CPU0:Dec 2 20:32:46.287 UTC: pfm_node_rp[385]: %PLATFORM-DIAGS-3-PUNT_FABRIC_DATA_PATH_FAILED : Set|online_diag_rsp[225402]|System Punt/Fabric/data Path Test(0x2000004)|failure threshold is 3, (slot, NP) failed: (0/0/CPU0, 0) LC/0/2/CPU0:Dec 2 20:32:52.613 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_0_LOW_RX_POWER_ALARM : Clear|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/2/CPU0:Dec 2 20:32:52.613 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_1_LOW_RX_POWER_ALARM : Clear|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/2/CPU0:Dec 2 20:32:52.614 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_2_LOW_RX_POWER_ALARM : Clear|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 LC/0/2/CPU0:Dec 2 20:32:52.614 UTC: pfm_node_lc[305]: %PLATFORM-CPAK-2-LANE_3_LOW_RX_POWER_ALARM : Clear|envmon_lc[163927]|0x1005000|HundredGigE0/2/0/0 RP/0/RSP0/CPU0:Dec 2 20:33:23.195 UTC: pfm_node_rp[385]: %PLATFORM-DIAGS-3-PUNT_FABRIC_DATA_PATH_FAILED : Set|online_diag_rsp[233600]|System Punt/Fabric/data Path Test(0x2000004)|failure threshold is 3, (slot, NP) failed: (0/0/CPU0, 0) LC/0/0/CPU0:Dec 2 20:35:53.345 UTC: prm_server_to[318]: %PLATFORM-NP-0-LC_RELOAD : LC Recovery started LC/0/0/CPU0:Dec 2 20:35:53.345 UTC: pfm_node_lc[305]: %PLATFORM-NP-0-FAILED_LC_RELOAD : Set|prm_server_to[163922]|0x1008000|An unrecoverable error has been detected. The linecard will be reloaded. LC/0/0/CPU0:Dec 2 20:35:53.346 UTC: pfm_node_lc[305]: %PLATFORM-PFM-0-CARD_RESET_REQ : Card reset requested by: Process ID: 163922 (prm_server_to), Target node: 0/0/CPU0, CondID: 1048, Fault Reason: An unrecoverable error has been detected. The linecard will be reloaded.

Conditions

destination interface of monitor-session/span goes down

Workaround

Remove monitor-session from source interface before bringing down the span destination interface

Further Problem Description