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ACCESS-LIST/EIGRP and other anti-mask calculation

Source: Internet
Author: User
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Access-list/eigrp and other anti-mask calculation principle: Address part, same as write, different write "0"Anti-mask section, same as write "0", different write "1"as172.16.1.0172.16.2.0172.16.3.0172.16.8.0172.16.9.0172.16.10.0172.16.11.0172.16.0000 00000000 00010000 001100000000 10010000 10100000 1011address section 0000 0000->172.16.0.0mask section 0000 1011->0.0.11.0The anti-mask uses three bit, so there are 8, because there is more than one match, so first on the access list to do the deny that. If you call with Route-map, you can writeaccess-list Permit 172.16.0.0 0.0.3.0 255.255.255.192 0.0.0.0if the IP access-group call is followed by the destination address, if Route-map is followed by the mask portion of the preceding address part matches

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ACCESS-LIST/EIGRP and other anti-mask calculation

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