Repeated SCN queue overflow errors seen on Brocade switch

• Frequent SCN events observed in ERR dumps logs:

2025/03/28-12:26:59 (PDT), [SCN-1001], 14194036, FFDC | CHASSIS, CRITICAL, BrocadeG620, SCN queue overflow for process 0.weblinker.fcg.

2026/07/14-17:01:38 (IST), [SCN-1001], 2920367, SLOT 1 | FFDC | CHASSIS, CRITICAL, xxxxxx, SCN queue overflow for process snmpd.
2026/07/14-17:12:38 (IST), [SCN-1001], 2920385, SLOT 1 | FFDC | CHASSIS, CRITICAL, xxxxxxx, SCN queue overflow for process snmpd.
2026/07/14-17:36:38 (IST), [SCN-1001], 2920395, SLOT 1 | FFDC | CHASSIS, CRITICAL, xxxxxxx, SCN queue overflow for process snmpd.
2026/07/14-17:47:38 (IST), [SCN-1001], 2920404, SLOT 1 | FFDC | CHASSIS, CRITICAL, xxxxxx, SCN queue overflow for process snmpd.

•  Multiple quarantined events shows in ERR dumps log:

2026/07/03-13:47:17 (IST), [NS-1026], 2914583, SLOT 1 | FID 128, INFO, XXXXXXXXXXXX,  Local domain 15, port index 94: A zoned device 0x0f5e4b has been quarantined.
2026/07/03-13:47:17 (IST), [NS-1026], 2914584, SLOT 1 | FID 128, INFO, XXXXXXXXXXXX,  Local domain 15, port index 94: A zoned device 0x0f5e4e has been quarantined.
2026/07/03-13:47:17 (IST), [NS-1026], 2914585, SLOT 1 | FID 128, INFO, XXXXXXXXXXXX,  Local domain 15, port index 94: A zoned device 0x0f5e47 has been quarantined.
2026/07/03-13:47:17 (IST), [NS-1021], 2914586, SLOT 1 | FID 128, INFO, XXXXXXXXXXXX,  Local Domain 15, Port index 94, unzoned device 0x0f5e40 has been quarantined.

Port Index 94 (Port 10/14):
2026/07/03-13:47:17 (IST), [NS-1026], Local domain 15, port index 94: A zoned device 0x0f5e4b has been quarantined.
2026/07/03-13:47:17 (IST), [NS-1021], Local Domain 15, Port index 94, unzoned device 0x0f5e40 has been quarantined.

• Few Slow drain events noticed in ERR dumps log:

2026/07/03-13:47:17 (IST), [MAPS-1022], 2914590, SLOT 1 | FID 128 | PORT 10/14, WARNING, XXXXXXXXXXXX, Port 10/14 (Port index 94) has been marked as Slow Drain Device.
2026/07/03-16:06:27 (IST), [MAPS-1022], 2914686, SLOT 1 | FID 128 | PORT 10/21, WARNING, HXXXXXXXXXXXX, Port 10/21 (Port index 213) has been marked as Slow Drain Device.
2026/07/03-13:47:17 (IST), [MAPS-1022], PORT 10/14, Port index 94 has been marked as Slow Drain Device.
2026/07/03-16:06:27 (IST), [MAPS-1022], PORT 10/21, Port index 213 has been marked as Slow Drain Device

• HA status shows:

Local CP (Slot 1, CP0): Active, Warm Recovered
Remote CP (Slot 2, CP1): Standby, Healthy

• To Islote this Slow Drain Device/quarantined events follow steps on the connected devices associated with ports
  • Physical connectivity and cabling.
  • SFP/optic health on the attached devices.
  • Device firmware and software versions.
  • Virtual device configuration and pathing.
  • Overall device health and performance.