Symptom

Impacts N9K-X9636C-RX only. Data traffic misbehavior due to ACL or routing issues right after module becomes online. This could be due to inability to program external TCAM properly if the interface link to the TCAM is down. This is a rare event that has been seen during repeated module reload tests; module goes online, but TCAM interface link is not up. Here is the command to check the status of ILKN link for TCAM interface. Ports 37 and 38 are the TCAM links. The '+" under Signal Lock indicates link is up. module-3# bcm-shell Available Unit Numbers: 0 1 2 3 bcm-shell.0> diag nif Nif status: -------------------- Port # | Port Type | SerDes # | Rx Seq Done | Signal Lock | SerDes Rate | Input RefClk ---------------------------------------------------------------------------------------------------------- 1 | XLAUI | 20-23 | 0xf | + | 10.298 | 156.25 5 | CAUI | 16-19 | 0xf | + | 25.773 | 156.25 9 | CAUI | 12-15 | 0xf | + | 25.773 | 156.25 13 | CAUI | 08-11 | 0xf | + | 25.773 | 156.25 17 | CAUI | 04-07 | 0xf | + | 25.773 | 156.25 21 | CAUI | 00-03 | 0xf | + | 25.773 | 156.25 25 | CAUI | 68-71 | 0xf | + | 25.773 | 156.25 29 | CAUI | 64-67 | 0xf | + | 25.773 | 156.25 33 | CAUI | 60-63 | 0xf | + | 25.773 | 156.25 37 | ILKN | 54-59 | 0x3f | + | 27.322 | 156.25 38 | ILKN | 48-53 | 0x3f | + | 27.322 | 156.25 49 | SGMII | 42 | 0x1 | + | 3.120 | 156.25 bcm-shell.0> The "-" sign indicates link is down. If ILKN link is down then there would be output like this: module-3# bcm-shell Available Unit Numbers: 0 1 2 3 bcm-shell.0> diag nif Nif status: -------------------- Port # | Port Type | SerDes # | Rx Seq Done | Signal Lock | SerDes Rate | Input RefClk ---------------------------------------------------------------------------------------------------------- 1 | XLAUI | 20-23 | 0xf | + | 10.298 | 156.25 5 | CAUI | 16-19 | 0xf | + | 25.773 | 156.25 9 | CAUI | 12-15 | 0xf | + | 25.773 | 156.25 13 | CAUI | 08-11 | 0xf | + | 25.773 | 156.25 17 | CAUI | 04-07 | 0xf | + | 25.773 | 156.25 21 | CAUI | 00-03 | 0xf | + | 25.773 | 156.25 25 | CAUI | 68-71 | 0xf | + | 25.773 | 156.25 29 | CAUI | 64-67 | 0xf | + | 25.773 | 156.25 33 | CAUI | 60-63 | 0xf | + | 25.773 | 156.25 37 | ILKN | 54-59 | 0x3f | - | 27.322 | 156.25 38 | ILKN | 48-53 | 0x3f | + | 27.322 | 156.25 49 | SGMII | 42 | 0x1 | + | 3.120 | 156.25 bcm-shell.0>

Conditions

Upon module boot up and LC online there can be rare event that TCAM interface link is not up. It is random and there is no trigger.

Workaround

The only way to recover is to reload the module.

Further Problem Description