IP loopback

[webstd.design]

When should I use "interface Loopback"?

Why it is used on the routers?

[garytayl]

Brief explanation can be found at:

http://www.ciscotaccc.com/kaidara-advisor/lanswitching/showcase?case=K11397092

[guruprasadr]

HI, [Pls RATE if HELPS]

Refer the link below, having the details about the earlier POST that was answered:

http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=LAN%2C%20Switching%20and%20Routing&topicID=.ee71a04&fromOutline=&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.2cc0652d

PLS RATE if HELPS

Best Regards,

Guru Prasad R

[sdoremus33]

Loopback interfaces are virtual interfaces and therefore are not succeptable to hw failure. also I use Loopbacks in OSPF evnironments for router identifier

Ex:

interface loopback0

ip address x.x.x.x. y.y.y.y

router ospf

router-id x.x.x.x. where x.x.x.x is the loopback0 interface created. HTH

[webstd.design]

Loopback interfaces are virtual interfaces and therefore are not succeptable to hw failure. also I use Loopbacks in OSPF evnironments for router identifier

Ex:

interface loopback0

ip address x.x.x.x. y.y.y.y

router ospf

router-id x.x.x.x. where x.x.x.x is the loopback0 interface created. HTH

Any body can say some example like this?

[Goutam Sanyal]

Hi Alexandr Kulbida,

Loopback interface can be used for OSPF, IPSLA, SNMP TRAP, NTP etc.

More details: http://en.wikipedia.org/wiki/Loopback

Thanks

Goutam