kernel: Badflags6:IN=ssg_eth1 errors in /var/log/messages
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kernel: Badflags6:IN=ssg_eth1 errors in /var/log/messages

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Article ID: 255763

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Updated On:

Products

CA API Gateway

Issue/Introduction

A user is experiencing intermittent network timeouts on one of their 4 production gateways. After troubleshooting, the user found this message repeated multiple times in /var/log/messages:

Dec  2 10:32:32 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:34:37 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:36:42 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:38:47 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:39:52 apimgwpr04 su: (to ssgconfig) ssgconfig on pts/0
Dec  2 10:40:52 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:42:57 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:45:02 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:47:07 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0
Dec  2 10:49:12 apimgwpr04 kernel: Badflags6:IN=ssg_eth1 OUT= MAC=33:33:00:00:00:01:55:55:55:55:55:55:86:dd SRC=fe80:0000:0000:0000:ffff:ffff:ffff:ffff DST=ff02:0000:0000:0000:0000:0000:0000:0001 LEN=76 TC=0 HOPLIMIT=1 FLOWLBL=0 PROTO=ICMPv6 TYPE=130 CODE=0

 

 

Environment

API Gateway 10.1

 

Cause

Somehow, ipv6 was enabled for the problem node. 

Resolution

Do one of the following options: 

1. In the /etc/sysctl.conf file, set net.ipv6.conf.all.accept_source_route = 0

2. run sysctl -p and then reboot

-------------------------------------

Check the /etc/sysconfig/network-scripts/ifcfg-ssg_eth1 file

DEVICE=ssg_eth0

ONBOOT=yes

BOOTPROTO=static

IPADDR=xxx.xxx.xxx.xxx

NETMASK=255.255.252.0

GATEWAY=xxx.xxx.xxx.xxx

IPV6INIT=no

The ipv6init should be set to "no" 

 

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