Jumbo frame firmware upgrade on AIX RAC DB servers
Jumbo frame firmware upgrade on AIX RAC DB servers
What is jumbo frame?
Jumbo frames are Ethernet frames with a payload greater than the standard maximum transmission unit (MTU) of 1500 bytes.
The standard MTU must be set to 1492 bytes when using Point To Point Protocol over Ethernet (PPPoE) connectivity.
Jumbo frames refer to Ethernet frames that can reach 9000 bytes in size, thus allowing a payload (MTU) greater than 1492 bytes. Although many variations exist, most manufacturers have adopted 9000 bytes as the conventional jumbo frame size. Only gigabit Ethernet networking devices have the ability to support jumbo frames.
| Outage Required? : Yes |
Post completion of this activity we need to do below checks.
1) Network interface and subnet masks for private interconnect must be same across the cluster nodes node1/node2
node1
| en5: flags=1e084863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,
GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN> inet 10.132.45.15 netmask 0xffffffe0 broadcast 10.132.45.31 |
node2
| en5: flags=1e084863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,
GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN> |
2)Jumbo frame setting needs to be verified and MTU size (that is equal to 9000) must be same across the cluster nodes node1/node2
Node1
| node1:/u00/app/oracle:SID=change_SID > netstat -rnI en5
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll |
Node2
| node2:/u00/app/oracle:SID=change_SID > netstat -rnI en5
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll |
3) Traceroute & ping on the private interconnect IPs should work across the cluster nodes node1/node2
See also