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how to configure loopback
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worrywarm
Senior Member
F
Registered: Feb 2004
Location:
Country: United States
State: MO
Certifications:
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Total Posts: 169
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 how to configure loopback
RouterA(config)# interface loopback 0
RouterA(config-if)# ip address 192.168.31.33 255.255.255.255
why use 255.255.255.255? is it wild card mask?
I also saw this
RouterA(config)# interface loopback 0
RouterA(config-if)# ip address 192.168.31.33 255.255.255.0
both are right? what's the difference?
Thanks a lot!
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 02-28-04 03:53 AM
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steeda
Member
Registered: Mar 2001
Location: San Diego
Country: USA
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Certifications: CCNP, MCSE 2k, CQS-CWLSS, CompTIA crap
Working on: CCSP
Total Posts: 99
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02-28-04 06:22 AM
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Yankee
Senior Member
Registered: Jun 2000
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Country: United States
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Total Posts: 1411
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In the real world, most use the /32 mask (host level) for a loopback to avoid wasting addresses but technically you can use any legit mask in the configuration. In a lab you may want to experiment with different masks and many loopbacks just to have a bunch of networks in the routing table.
Yankee
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02-28-04 12:34 PM
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