F5 Persistence - TMOS 201

Question 1

What is persistence?

Answer 1

It is known as stickiness, affinity, or session persistence is used to direct additional requests and connections from a client to a virtual server to the same real server as the initial connection.

Question 2

How do you configure persistence on a virtual server?

Answer 2

Use a persistence profile.

Question 3

Name the 8 persistence methods

Answer 3

Source affinity address
Destination address
Cookie
Hash
SSL
Universal
SIP
Microsoft RDP

Question 4

Name the 4 types of cookie persistence

Answer 4

Cookie insert (managed by BigIP)
Cookie rewrite (managed by BigIP)
Cookie pass-through/passive (managed by pool member)
Cookie hash

Question 5

In order to set a Cookie in the header, what is inserted by the bigip?

Answer 5

Set-cookie: name=value, expiration date, path, domain, httponly.

Question 6

When the client responds with the cookie, what does the header response look like?

Answer 6

Cookie: name=value

Question 7

What is source affinity address persistence?

Answer 7

It is a persistent connection based on source ip address or range of source addresses.

Question 8

What is cookie persistence?

Answer 8

A method that works at the application layer. It’s specifically used for HTTP, and it stores a cookie on the client.

Question 9

What is destination address persistence?

Answer 9

All client requests are directed to a specific server.

Question 10

What is Hash persistence?

Answer 10

It uses an irule or in-profile hash parameters to generate a hash. This value will be place into the persistence table.

Question 11

What is Microsoft RDP persistence?

Answer 11

It is based on an unique RDP identifier. It works even if the client source ip address changes.

Question 12

What is SIP persistence?

Answer 12

It’s based on a session ID between client and server. It works even if the client source ip address changes.

Question 13

What is SSL persistence?

Answer 13

It is based on a SSL session ID between client and server. It works even if the client source ip address changes.

Question 14

What is Universal persistence?

Answer 14

Customize based on your own criteria. An example is to use the jsession ID.
It’s similar to hash persistence, real values are used. An irule is needed to locate the real values (data).

Question 15

What is persistence record idle time out?

Answer 15

A interval timer set to expire client traffic if it does not receive any traffic from the client.

Question 16

How do you view persistence records in tmsh?

Answer 16

show ltm persistence persist-records all-properties

Question 17

What is the default cookie name?

Answer 17

BigipServer

Question 18

True or false: you must enable an HTTP profile in order to use cookie persistence.

Answer 18

True

Question 19

What is cookie hash persistence?

Answer 19

A hash value is calculated based on the number of characters in the cookie, and this value is placed in a peristence table that will be reference for subsequent traffic from the client within the same session.

Question 20

What is fallback persistence?

Answer 20

Known as backup persistence. Only available options are source and destination persistence.

Question 21

How do you create a persistence profile?

Answer 21

Navigate to Local Traffic ›› Profiles : Persistence
Choose the type of persistence for the new profile.

Question 22

Where would you bind a persistence profile to a virtual server?

Answer 22

Under the virtual server’s resource tab.

Question 23

What is the command to view persistence records?

Answer 23

show ltm persistence persist-records