After upgrading QFX5100 Virtual Chassis (2 qfx5100-96s and 1 qfx5100-24q) to 17.3R3-S4 Flex, some packet loss is observed due to CRC erros on the vcp port.
[master:0] root@QFX1> show virtual-chassis Preprovisioned Virtual Chassis Virtual Chassis ID: 2ad6.1038.9a52 Virtual Chassis Mode: Enabled Mstr Mixed Route Neighbor List Member ID Status Serial No Model prio Role Mode Mode ID Interface 0 (FPC 0) Prsnt VB3715290014 qfx5100-96s-8q 129 Master* N VC 2 vcp-255/0/101 1 vcp-255/0/96 1 (FPC 1) Prsnt VB3715320008 qfx5100-96s-8q 129 Backup N VC 0 vcp-255/0/96 2 vcp-255/0/99 2 (FPC 2) Prsnt TB3716340189 qfx5100-24q-2p 0 Linecard N VC 0 vcp-255/1/0 1 vcp-255/1/1
[master:0] root@QFX1> show virtual-chassis vc-port statistics vcp-255/1/0 extensive fpc0: -------------------------------------------------------------------------- error: Statistics for vcp-255/1/0 not found localre: -------------------------------------------------------------------------- error: Statistics for vcp-255/1/0 not found fpc2: -------------------------------------------------------------------------- RX TX Port: vcp-255/1/0 Total octets: 620122064928 28196900785348 Total packets: 4428342022 201403702446 Unicast packets: 4428341215 201403474057 Broadcast packets: 807 224069 Multicast packets: 0 4320 MAC control frames: 0 0 CRC alignment errors: 195 <-- CRC errors Oversize packets: 0 Undersize packets: 0 Jabber packets: 0 Fragments received: 0 Ifout errors: 0 64 octets frames: 0 65-127 octets frames: 2279946 128-255 octets frames: 205829233849 256-511 octets frames: 128641 512-1023 octets frames: 128641 1024-1518 octets frames: 244854 Rate packets per second: 844040 1 Rate bytes per second: 118166347 106 [master:0]
root@QFX1> show version | match "Model|^Junos:" Model: qfx5100e-96s-8q Junos: 17.3R3-S4.2 flex Model: qfx5100e-96s-8q Junos: 17.3R3-S4.2 flex Model: qfx5100e-24q-2p Junos: 17.3R3-S4.2 flex
The vcp port on the qfx5100-24q is not properly initializing.
Please refer to PR1444845 - CRC errors might be seen on QFX5100-VC for the list of fixed releases.
Reconfigure VCP connection on 24Q setup to initialize properly and CRC will no longer seen.
Here are the steps to do so:
Login to the virtual chassis and connect to member 2 (the qfx5100-24q):
[master:0] root@QFX1> show virtual-chassis Preprovisioned Virtual Chassis Virtual Chassis ID: 2ad6.1038.9a52 Virtual Chassis Mode: Enabled Mstr Mixed Route Neighbor List Member ID Status Serial No Model prio Role Mode Mode ID Interface 0 (FPC 0) Prsnt VB3715290014 qfx5100-96s-8q 129 Master* N VC 2 vcp-255/0/101 1 vcp-255/0/96 1 (FPC 1) Prsnt VB3715320008 qfx5100-96s-8q 129 Backup N VC 0 vcp-255/0/96 2 vcp-255/0/99 2 (FPC 2) Prsnt TB3716340189 qfx5100-24q-2p 0 Linecard N VC 0 vcp-255/1/0 1 vcp-255/1/1 [master:0] root@QFX1> request session member 2 Last login: Wed Jan 8 22:09:54 from master --- JUNOS 19.1I-20191212.0.2159 Kernel 64-bit JNPR-11.0-20191126.201716__ci_f At least one package installed on this device has limited support. Run 'file show /etc/notices/unsupported.txt' for details. root@QFX1:LC:2% cli warning: This chassis is operating in a non-master role as part of a virtual-chassis (VC) system. warning: Use of interactive commands should be limited to debugging and VC Port operations. warning: Full CLI access is provided by the Virtual Chassis Master (VC-M) chassis. warning: The VC-M can be identified through the show virtual-chassis status command executed at this console. warning: Please logout and log into the VC-M to use CLI.
Delete one of the virtual chassis ports:
{linecard:2} root@QFX1> request virtual-chassis vc-port delete pic-slot 1 port 0 Port deletion initiated, use cmd show virtual-chassis vc-port to verify
Verify the port is deleted:
{linecard:2} root@QFX1> show virtual-chassis Preprovisioned Virtual Chassis Virtual Chassis ID: bd1c.c712.d06f Virtual Chassis Mode: Enabled Mstr Mixed Route Neighbor List Member ID Status Serial No Model prio Role Mode Mode ID Interface 0 (FPC 0) Prsnt VB3119310003 qfx5100-96s-8q 129 Master N VC 1 vcp-255/0/98 1 vcp-255/0/97 1 vcp-255/0/99 1 (FPC 1) Prsnt VB3119300023 qfx5100-96s-8q 129 Backup N VC 0 vcp-255/0/98 2 vcp-255/0/101 0 vcp-255/0/97 0 vcp-255/0/99 2 (FPC 2) Prsnt VG3716010077 qfx5100-24q-2p 0 Linecard* N VC 1 vcp-255/1/1
Convert the port back to vcp:
{linecard:2} root@QFX1> request virtual-chassis vc-port set pic-slot 1 port 0 Port conversion initiated, use show virtual-chassis vc-port to verify
Verify the port is converted back to vcp:
{linecard:2} root@QFX1> show virtual-chassis Preprovisioned Virtual Chassis Virtual Chassis ID: bd1c.c712.d06f Virtual Chassis Mode: Enabled Mstr Mixed Route Neighbor List Member ID Status Serial No Model prio Role Mode Mode ID Interface 0 (FPC 0) Prsnt VB3119310003 qfx5100-96s-8q 129 Master N VC 1 vcp-255/0/98 2 vcp-255/0/101 1 vcp-255/0/97 1 vcp-255/0/99 1 (FPC 1) Prsnt VB3119300023 qfx5100-96s-8q 129 Backup N VC 0 vcp-255/0/98 2 vcp-255/0/101 0 vcp-255/0/97 0 vcp-255/0/99 2 (FPC 2) Prsnt VG3716010077 qfx5100-24q-2p 0 Linecard* N VC 0 vcp-255/1/0 1 vcp-255/1/1
Confirm CRC is no longer seen:
{linecard:2} root@QFX1> show virtual-chassis vc-port statistics vcp-255/1/0 extensive fpc0: -------------------------------------------------------------------------- error: Statistics for vcp-255/1/0 not found fpc1: -------------------------------------------------------------------------- error: Statistics for vcp-255/1/0 not found localre: -------------------------------------------------------------------------- RX TX Port: vcp-255/1/0 Total octets: 135644 200081 Total packets: 728 722 Unicast packets: 728 715 Broadcast packets: 0 7 Multicast packets: 0 0 MAC control frames: 0 0 CRC alignment errors: 0 Oversize packets: 0 Undersize packets: 0 Jabber packets: 0 Fragments received: 0 Ifout errors: 0 64 octets frames: 0 65-127 octets frames: 1246 128-255 octets frames: 2 256-511 octets frames: 23 512-1023 octets frames: 23 1024-1518 octets frames: 101 Rate packets per second: 50 55 Rate bytes per second: 5104 7846