Forum Discussion
NimbostratusLACP of 10G and 40G ports
Nimbostratus"so can we use different port other than management or data port for snmp and syslog?"
Sure can. Typical physical appliances have 8 ports in addition to Management. I have one setup where 4 ports are used for data (client-side + server-side VLANs), 2 ports used for HA and traffic mirror (single VLAN for both functions) and 2 ports for ASM remote logging on a dedicated VLAN. You can use this aggregated interface for snmp and syslog instead of remote ASM logging.
Obviously, a single 10G interface would be more than enough for syslog and SNMP, however, as with any physical appliances, it's always best to go with LACP links to have that extra insurance against link failures. Fibre cables cost nothing compared to loss of logs due to an interface failure.
Nimbostratuscan we add three bigip appliances 12000 series in one cluster like Bigip A will be active and rest two will be standby..connect back to back interface like: BigipA---BigipB BigipA---BigipC
To answer the first part of question, yes you can have a cluster of 3 appliances where 1 is Active and 2 are Standby. I actually recommend Active-Active-Standby to make better use of your hardware. At first sight, it seems it will make make most sense to go with 2 traffic groups where Unit A serves traffic-group-1 as primary Active, Unit B serves traffic-group-2 as primary Active, and Unit C is Standby for traffic-group-1 and traffic-group-2. Unit C is not under substantial risk of overloading because it's unlikely for Unit A and Unit B to suffer from a failure at the same time.
The way Active-Active(-Standby) works in F5 is that you distribute services across traffic groups. A traffic group takes ownership of some IP addresses so you need to make a rough guess (or use available data) to allocate services to traffic groups so that they are more or less balanced in terms of load. It's a one-time effort, but traffic groups can be adjusted at a later time if some new services need to be added, or old ones removed.
- To give you an example, if you have one popular service that uses 40% of bandwidth and 6 services that use 10% each, it would make sense to put that 40% bandwidth service and one 10% bandwidth service in traffic-group-1 (two IP addresses total), and the remaining 5x of 10% bandwidth services in traffic-group-2 (five IP addresses total).
I cannot answer second part of the question, how exactly you want to cable these together? Possible to make a drawing and upload somewhere? FYI, only HA cables should be directly connected appliance-to-appliance (bypassing network switch).
If these answers help you, would appreciate an upvote on the initial answer.
Regards,
