Alcatel-Lucent 5620 Troubleshooting Manual page 126

Release 12.0 R4 | August 2014 | 3HE 08864 AAAD TQZZA Edition 01
10 — Troubleshooting the 5620 SAM platform
Perform this procedure when one of the following occurs:
•
•
The default ARP cache threshold values are the following:
•
•
•
1 Log in to the main server station as the root user.
2 Open a console window.
3 Perform one of the following to increase the ARP cache thresholds.
a
b
4 Close the console window.
10-10
The /var/log/messages file contains more than 1024 entries.
You need to increase the ARP cache size to accommodate the network.
Threshold 1—128
Threshold 2—512
Threshold 3—1024
To temporarily increase the thresholds, type the following:
# echo 8096 > /proc/sys/net/ipv4/neigh/default/gc_thresh1 ↵
# echo 25600 > /proc/sys/net/ipv4/neigh/default/gc_thresh2 ↵
# echo 32384 > /proc/sys/net/ipv4/neigh/default/gc_thresh3 ↵
To permanently override the default thresholds, perform the following steps.
i Open the /etc/sysctl.conf file using a plain-text editor such as vi.
ii Locate the following comment line:
#========= 5620 SAM: Info begins =========
iii Add the following after the comment line:
net.ipv4.neigh.default.gc_thresh1 = 8096
net.ipv4.neigh.default.gc_thresh2 = 25600
net.ipv4.neigh.default.gc_thresh3 = 32384
iv Save and close the file.
v Enter the following:
# sysctrl -p ↵
Alcatel-Lucent 5620 Service Aware Manager
Troubleshooting Guide
5620 SAM