ARP-3-DUP_VADDR_SRC_IP NEXUS 5548

[dtrombetta]

Hi !

I've two NEXUS 5548 with VPC. Only one Vlan ( total SVI is 10 and only one have this problem ) present the error messages

2019 Nov 20 15:38:56 N5k-CORE-A %ARP-3-DUP_VADDR_SRC_IP: arp [3492] Source address of packet received from 0000.0c07.ac14 on Vlan20(port-channel1) is duplicate of local virtual ip, 192.168.20.254

this is the configuration of two NEXUS

NEXUS-A:

interface Vlan20
description EX-Dati
no shutdown
no ip redirects
ip address 192.168.20.2/24
hsrp 20
preempt
priority 201
ip 192.168.20.254

N5k-CORE-A# sh hsrp group 20
Vlan20 - Group 20 (HSRP-V1) (IPv4)
Local state is Active, priority 201 (Cfged 201), may preempt
Forwarding threshold(for vPC), lower: 1 upper: 201
Hellotime 3 sec, holdtime 10 sec
Next hello sent in 0.248000 sec(s)
Virtual IP address is 192.168.20.254 (Cfged)
Active router is local
Standby router is 192.168.20.3 , priority 200 expires in 2.740000 sec(s)
Authentication text "cisco"
Virtual mac address is 0000.0c07.ac14 (Default MAC)
17 state changes, last state change 02:59:13
IP redundancy name is hsrp-Vlan20-20 (default)

NEXUS-B:

interface Vlan20
description EX-Dati
no shutdown
no ip redirects
ip address 192.168.20.3/24
hsrp 20
preempt
priority 200
ip 192.168.20.254
ip dhcp relay address 192.168.20.91

N5k-CORE-B# sh hsrp group 20
Vlan20 - Group 20 (HSRP-V1) (IPv4)
Local state is Standby, priority 200 (Cfged 200), may preempt
Forwarding threshold(for vPC), lower: 1 upper: 200
Hellotime 3 sec, holdtime 10 sec
Next hello sent in 0.011000 sec(s)
Virtual IP address is 192.168.20.254 (Cfged)
Active router is 192.168.20.2, priority 201 expires in 6.610000 sec(s)
Standby router is local
Authentication text "cisco"
Virtual mac address is 0000.0c07.ac14 (Default MAC)
21 state changes, last state change 03:00:10
IP redundancy name is hsrp-Vlan20-20 (default)

N5k-CORE-B#

I've change the priority on NEXUS-B ( high ), but the problem is ever present....  IS A BUG????

On forum cisco , the same problem on NEXUS 7K is legacy a BUG  CSCuj55464....

[balaji.bandi]

are you running the same version which reported as a bug ?

suggested using HSRP v2 for good standard. (not sure this fix issue - suggested version)

[dtrombetta]

Hi ,

the actual version is 7.1(3)N1(1) and on this version is not present a BUG for this problem..

SHOW VERSION:

N5k-CORE-A# sh version
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Documents: http://www.cisco.com/en/US/products/ps9372/tsd_products_support_series_home.html
Copyright (c) 2002-2015, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained herein are owned by
other third parties and are used and distributed under license.
Some parts of this software are covered under the GNU Public
License. A copy of the license is available at
http://www.gnu.org/licenses/gpl.html.

Software
BIOS: version 3.6.0
Power Sequencer Firmware:
Module 1: v2.0
Module 2: v5.0
Microcontroller Firmware: version v1.2.0.1
QSFP Microcontroller Firmware:
Module not detected
CXP Microcontroller Firmware:
Module not detected
kickstart: version 7.1(3)N1(1)
system: version 7.1(3)N1(1)
BIOS compile time: 05/09/2012
kickstart image file is: bootflash:///n5000-uk9-kickstart.7.1.3.N1.1.bin
kickstart compile time: 11/16/2015 22:00:00 [11/17/2015 08:10:05]
system image file is: bootflash:///n5000-uk9.7.1.3.N1.1.bin
system compile time: 11/16/2015 22:00:00 [11/17/2015 10:09:53]

Hardware
cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")
Intel(R) Xeon(R) CPU with 8253868 kB of memory.
Processor Board ID FOC213208NN

Device name: N5k-CORE-A
bootflash: 1990656 kB

Kernel uptime is 194 day(s), 0 hour(s), 52 minute(s), 52 second(s)

Last reset
Reason: Unknown
System version: 7.1(3)N1(1)
Service:

plugin
Core Plugin, Ethernet Plugin

N5k-CORE-B# sh version
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Documents: http://www.cisco.com/en/US/products/ps9372/tsd_products_support_series_home.html
Copyright (c) 2002-2015, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained herein are owned by
other third parties and are used and distributed under license.
Some parts of this software are covered under the GNU Public
License. A copy of the license is available at
http://www.gnu.org/licenses/gpl.html.

Software
BIOS: version 3.6.0
Power Sequencer Firmware:
Module 1: v2.0
Module 2: v5.0
Microcontroller Firmware: version v1.2.0.1
QSFP Microcontroller Firmware:
Module not detected
CXP Microcontroller Firmware:
Module not detected
kickstart: version 7.1(3)N1(1)
system: version 7.1(3)N1(1)
BIOS compile time: 05/09/2012
kickstart image file is: bootflash:///n5000-uk9-kickstart.7.1.3.N1.1.bin
kickstart compile time: 11/16/2015 22:00:00 [11/17/2015 08:10:05]
system image file is: bootflash:///n5000-uk9.7.1.3.N1.1.bin
system compile time: 11/16/2015 22:00:00 [11/17/2015 10:09:53]

Hardware
cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")
Intel(R) Xeon(R) CPU with 8253868 kB of memory.
Processor Board ID FOC213209AY

Device name: N5k-CORE-B
bootflash: 1990656 kB

Kernel uptime is 194 day(s), 0 hour(s), 55 minute(s), 11 second(s)

Last reset
Reason: Unknown
System version: 7.1(3)N1(1)
Service:

plugin
Core Plugin, Ethernet Plugin
N5k-CORE-B#

The BUG are present on NX7K... for me is same problem in another product..