| Why would a summarized static route be configured on a router? | To reduce the size of the routing table |
| Calculating valid summary routes: Example: Calculate a valid summary route for networks: 192.168.1.0 11000000.10101000.00000001.00000000 192.168.3.0 11000000.10101000.00000011.00000000 192.168.4.0 11000000.10101000.00000100.00000000 Answer: The 21st digit out of 32 bits is the common shared bit(common leftmost), from the 22nd bit on all numbers are unique. 192.168.0.0 /21 255.255.248.0 11000000.10101000.00000000.0000000 Note: These Routes would also work: /1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20 |
|
| Calculating valid summary routes: Example: Calculate a valid summary route for networks: 192.168.8.0 /22 11000000.10101000.00011000.00000000 192.168.12.0 /22 11000000.10101000.00001100.00000000 192.168.16.0 /22 11000000.10101000.00010000.00000000 Answer: The 19th digit out of 32 bits is the common shared bit(common leftmost), from the 20th bit on all numbers are unique. 192.168.0.0 /19 11000000.10101000.00000000.0000000 Note: These Routes would also work: /1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18 |
|
| Subnet 192.168.10.45 /26 into four subets. | 192.168.10.0 192.168.10.64 192.168.10.128 192.168.10.192 |
| A summary route represents multiple networks. A summarized static route does not necessarily provide a better route than a routing protocol does. A default static route would provide a default gateway for a router that is connected to an ISP. Routing protocol updates may not necessarily be reduced in size if a static route routews are also used. In english: The "summarized static route": 172.16.64.0 /20 contains all the routes beneath it: /21 /22 /23 /24 |
|
| data |