sudden increase in arp entries when i rlogin from one node to another node

Question

when I r-login from my one host to another, I am observing sudden increase in arp entries from 80 to 900. and this is causing neighbour table overflow. can anyone suggest why this is happening??

before r-login:

ip -4 neigh show nud all | wc -l
81

after r-login:

ip -4 neigh show nud all | wc -l
890

score 0 · Answer 1 · edited Apr 13 '17 at 12:14

0

This is not a conclusive answer, but as is mentioned in this post

ARP broadcast flooding network and high cpu usage

You could use something like mac-address-table notification to see which party is the offending one.

Also consider the possibility that perhaps not only r-login is causing this, you could test with Telnet to see if the issue occurs with that as well.

edited Apr 13 '17 at 12:14

Community

1

answered Feb 26 '16 at 11:03

Sam Perry

41
5

i tried ssh and telnet. it didnt cause increase in arp entries. its occuring only when i use rlogin. – naveen kanni Feb 26 '16 at 11:17
interesting that its only rlogin If you temporarily remove any /etc/hosts.equiv and .rhosts on the remote side, restart xinetd and retry does this reoccur? – Sam Perry Feb 26 '16 at 11:54
well this didn't work too @sam perry – naveen kanni Feb 29 '16 at 07:04
No solution for this?? – naveen kanni Mar 04 '16 at 05:30
No alternatives ? – naveen kanni Mar 04 '16 at 06:15
unfortunately I cannot think of much else; does connecting via rlogin to a different machine cause the same issue or is it just this one? – Sam Perry Mar 07 '16 at 15:17

sudden increase in arp entries when i rlogin from one node to another node

1 Answers1