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Table of Contents
LINUX NETWORKING CONFIGURATION
Advanced net configuration
Net Status / check
Looking for net devices
How to check the network interfaces
- using dmidecode
- Using ip monitor command
- Using lspci and dmesg
uuidgen eth0
speed 10GB no auto neg
echo 'ETHTOOL_OPTS=“speed 10000 duplex full autoneg off”' » /etc/sysconfig/network-scripts/ifcfg-eth1
Network Issus and toubleshooting
1. Error: Connection activation failed: Master connection not found or invalid
You need add this parameter to the NM_CONTROLLED=no to the connfiguration file
GUIDE: Oracle VM VirtualBox and Oracle Linux NIC bonding Guide fail_over_mac=1
2. Intermittent Slower Network and Connection Timeouts (Doc ID 1614134.1)
Attempts to connect to a server with ssh and/or sftp results in time-outs or a delayed response.
When the network load goes high, there are high number of network retransmits observed.
3. package drop analysis
4. rsyc fail to transfer
Connection using SSH to a Host Not in DNS/hosts Stalls for Some Time at Connection Initiation (Doc ID 1066024.1) Scp Transfer 'stall' Between Oracle Linux Servers (Doc ID 1997673.1).
- VALIDAR CUANDO NO FUNCIONA EL RSYN O SCP NO PERMITEN PASAR ARCHIVOS MAYORES A 1M
5. rp_filter
rp_filter - INTEGER
0 - No source validation.
1 - Strict mode as defined in RFC3704 Strict Reverse Path Each incoming packet is tested against the FIB and if the interface is not the best reverse path the packet check will fail. By default failed packets are discarded.
2 - Loose mode as defined in RFC3704 Loose Reverse Path Each incoming packet's source address is also tested against the FIB and if the source address is not reachable via any interface the packet check will fail.
6. NFS Debug
