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【正文】 GIP Controller Servers 1 2 Inter Next requests goes to Node with bination of fewest connections and best response over time 43 Priority Group Activation Clients Router BIGIP Controller Servers 1 3 5 2 4 6 Inter Priority 1 Priority 2 If you set Priority Group Activation to 2, and 3 of the highest priority members are available, then lower priority members will not be used. 44 Priority Group Activation Clients Router BIGIP Controller Servers 1 5 Inter Priority 1 Priority 2 3 2 4 6 7 8 If number of members falls below Priority Group Activation (2), then the next highest priority members are used also. 45 Fallback Host Clients Router BIGIP Controller Servers Inter If all members fail, then client is sent an redirect to and alternate server. 46 Pool Member vs. Node Load Balancing by: ? Pool Member – IP Address service ? Node – Total services for one IP Address 47 If using Member Inter Next requests goes to Pool Member with fewest connections Current Connections 107 108 99 ftp 2 3 25 1 2 If pool uses Least Connections (member) load balancing method, then… 48 If using Node 1 2 Inter Next requests go to IP Address with fewest total connections Current Connections 107 108 99 ftp 2 3 25 49 Configuring Load Balancing 50 Ratio Priority Group Activation 51 Module 3 – Monitors Inter :80 52 Module 3 Outline ? Monitor Concepts ? Configuring Monitors ? Assigning Monitors ? Node and Member Status ? Health Monitor Labs 53 Monitor Concepts ? Address Check – Node – IP Address ? Service Check – IP : port ? Content Check – IP : port plus check data returned ? Interactive Check ? Path Check 54 Address Check Steps – Packets sent to IP Addresses – If no response, then no traffic sent to members using that node address Example ICMP Inter ICMP 55 Service Check Steps – Opens TCP connection (IP Address : service) – Connection closed – If TCP connection fails, then no traffic sent to associated Members – Example – TCP Inter TCP Connection 56 Content Check Inter Steps – Opens TCP connection (IP Address : service) – Sends a request – Response returns data – Connection closed – If Receive Rule not found in data, then no traffic sent to associated Members – Example – GET / 57 Interactive Check Inter Steps – Opens TCP connection (IP Address : service) – Interactive conversation to simulate realworld – Connection closed – If expected results do not occur, then no traffic sent to associated Members – Example – SQL request conversation 58 Path Check Steps – Sends packet through, not to the device – Can check IP Address, Service or Content – If condition not met, then no traffic sent through associated member Link Cntl ISP2 ISP1 ISP1 59 Configuring Monitors ? System Supplied Monitors (Templates) – Address Checks (icmp) – Service Checks (tcp) – Content Check
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