Convert the loopback address into network address(EIGRP Manual Summarization)

[hussainabbas1442]

Hi all,

I have been given loopback ip addresses 60.50.0.1/16 ,60.100.0.1/16, 60.150.0.1/16, 60.200.0.1/16 and i need to convert them into network address using manual summarization but i have hardly no clue how to do it.

Thank you in advance for helping me.

[balaji.bandi]

not sure what is the context here of your goal

in general you looking manual summarisation as below :

1. you need to disable auto summary

 router eigrp ASnumber

no atuo-summary

2. you looking to do manual summary.

ip summary-address eigp ASnumber ip address  mask (in your case 60.50.0.1/16 ,60.100.0.1/16, 60.150.0.1/16, 60.200.0.1/16)

is this what you looking, if not elaborate more of your question and requirement.

[Georg Pauwen]

Hello,

the summary address is:

ip summary-address eigrp X 60.0.0.0 255.0.0.0

[hussainabbas1442]

Hi @balaji.bandi  and @Georg Pauwen,

I was given this to make in Packet tracer but before i design or arrange in Packet Tracer i says to connvert the following into network address so I have no clue for that as well but thank you for the commands.

[Giuseppe Larosa · Accepted solution]

Hello @hussainabbas1442 ,

convert the loopback addresses to network addresses means find the subnet address of each

example:

60.50.0.1/16  loop0  ------->      60.50.0.0/16   the subnet address has all zeros in the host portion that for /16 are the last two bytes or octets.

please note the EIGRP manual summarization is configured at interface level and will create a summary route that is sent out the interface where it is applied

example:

int fas0/0

ip eigrp 60 summary-address 60.0.0.0 255.0.0.0

Hope to help

Giuseppe

[Georg Pauwen]

Hello,

looking at this again, since they want you to convert the loopbacks to'network addresses' (plural), they might just want you to use a network statement for each loopback:

router eigrp 1

network 60.50.0.0 0.0.255.255

network 60.100.0.0 0.0.255.255

network 60.150.0.0 0.0.255.255

network 60.200.0.0 0.0.255.255

[balaji.bandi]

As per the information and input we have given right direction, you need to test and advise if anything not working.

[hussainabbas1442]

The main confusion is do i have to convert manually or the packet tracer will provide the manual summarize with the command

[Martin L]

Until IOS 15, EIGRP process did auto-summary by default; we had to turn it off with no atuo-summary under router eigrp. That auto summary was not a good idea; pretty much everyone type no atuo-summary right after router eigrp x.

Finally, Cisco turn it auto off in IOS 15. From highlighted part, I think, they ask to do it manually with ip eigrp 60 summary-address 60.0.0.0 255.0.0.0  under interface level. Looks like your Exercise goal is to learn summarization and how to enable summarization on eigrp

anyway, You should learn enabling it both ways;