Forum Discussion
Brandon_W_14724
Nimbostratus
NimbostratusARP requests for 127.2.0.1
Our GTM (BIG-IP 11.4.1 Build 635.0 HF2) is constantly—several times a second—sending out ARP requests out the mgmt interface for the IP address 127.2.0.1 with a source address of 127.2.0.2. For example:
2014-11-26 11:59:44.543142 00:01:d7:d5:2c:01 -> ff:ff:ff:ff:ff:ff ARP Who has 127.2.0.1? Tell 127.2.0.22014-11-26 11:59:44.543149 00:01:d7:d5:2c:01 -> ff:ff:ff:ff:ff:ff ARP Who has 127.2.0.1? Tell 127.2.0.22014-11-26 11:59:45.543200 00:01:d7:d5:2c:01 -> ff:ff:ff:ff:ff:ff ARP Who has 127.2.0.1? Tell 127.2.0.22014-11-26 11:59:45.543205 00:01:d7:d5:2c:01 -> ff:ff:ff:ff:ff:ff ARP Who has 127.2.0.1? Tell 127.2.0.22014-11-26 11:59:46.543134 00:01:d7:d5:2c:01 -> ff:ff:ff:ff:ff:ff ARP Who has 127.2.0.1? Tell 127.2.0.22014-11-26 11:59:46.543140 00:01:d7:d5:2c:01 -> ff:ff:ff:ff:ff:ff ARP Who has 127.2.0.1? Tell 127.2.0.2Does anyone know why this is happening or how I can make it stop?
Jason_04_138617Posting to subscribe.
What_Lies_Bene1Cirrostratus
127.2.0.2 is a local loopback address;
~ ip a s 1: lo: mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/24 scope host lo inet 127.2.0.2/24 brd 127.2.0.255 scope host lo:1 inet6 ::1/128 scope host valid_lft forever preferred_lft forever127.2.0.1 is the 'internal' SCCP IP address;
~ more /root/.ssh/known_hosts 127.2.0.1,sccp ssh-rsa .....[edited]= SCCP server RSA2 keySo, perhaps your box has lost communication with the switch management subsystem (SCCP) for some reason? You could reset SCCP but this will no doubt lead to traffic loss so perhaps a full system reboot would be better, see here for more information:
">https://support.f5.com/kb/en-us/solutions/public/3000/400/sol3454.html" target="_blank">">https://support.f5.com/kb/en-us/solutions/public/3000/400/sol3454.html