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Summarize routes
txn41655
Member Posts: 53 ■■□□□□□□□□
in CCNA & CCENT
hi, I am new. Could any one tell me if is possible to summarize the following routes? :
172.30.0.0/26
172.30.0.64/26
172.30.0.128/26
172.30.0.192/26
172.20.0.0/27
172.20.0.32/27
172.20.0.64/27
172.20.0.96/27
172.30.0.0/26
172.30.0.64/26
172.30.0.128/26
172.30.0.192/26
172.20.0.0/27
172.20.0.32/27
172.20.0.64/27
172.20.0.96/27
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dontstop
Member Posts: 579 ■■■■□□□□□□
hi, I am new. Could any one tell me if is possible to summarize the following routes? :
172.30.0.0/26
172.30.0.64/26
172.30.0.128/26
172.30.0.192/26
Answer: 172.30.0.0/24
/25 wouldn't work because that mask would give you ranges 172.30.0.0 - 127 or 172.30.0.128 - 255172.20.0.0/27
172.20.0.32/27
172.20.0.64/27
172.20.0.96/27
Answer: 172.20.0.0/25
/26 wouldn't work because because that mask gives you 172.20.0.0 - 63, 64 - 127, 128 - 191, 192 - 255 -
Optionstxn41655
Member Posts: 53 ■■□□□□□□□□
thanks, could you tell me in which case we cannot summarize?
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Optionsdontstop
Member Posts: 579 ■■■■□□□□□□
I'm not sure I follow. Are you talking about in regards to the above question or in general? Is this homework?
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Optionstxn41655
Member Posts: 53 ■■□□□□□□□□
thanks i am studying, never mind my last post....i did not read what you edited after...
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Optionstxn41655
Member Posts: 53 ■■□□□□□□□□
Answer: 172.30.0.0/24
/25 wouldn't work because that mask would give you ranges 172.30.0.0 - 127 or 172.30.0.128 - 255
Answer: 172.20.0.0/25
/26 wouldn't work because because that mask gives you 172.20.0.0 - 63, 64 - 127, 128 - 191, 192 - 255
If we summary 172.30.0.0/24 this would include network and broadcast addresses. Will the router route correctly ? what if someone pings the network address or the broadcast address? thanks.
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Optionsdontstop
Member Posts: 579 ■■■■□□□□□□
Think about how routes are normally stored in a router routing table. Think of 192.168.0.0/24 for instance, it's the Class C network 192.168.0.0/24, the route includes all addresses in the subnet.
