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What does 'IP Routing is NSF aware' mean?

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Feb 3rd, 2014
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I just issued show ip protocols in our company router and it showed the below output.


Switch#show ip protocols

*** IP Routing is NSF aware ***



Why does it not show any protocols / routes? Can some one explain

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Reza Sharifi Mon, 02/03/2014 - 17:48
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Why does it not show any protocols / routes? Can some one explain


The router may not be running any routing protocols.

devils_advocate Mon, 02/03/2014 - 23:42
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Switch#show ip protocols

*** IP Routing is NSF aware ***


Are you sure you have run this command on a Router and not a Switch?

ranjipremandrewp Mon, 02/03/2014 - 23:48
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I ran this command on an L3 switch.

Sent from Cisco Technical Support iPhone App

devils_advocate Tue, 02/04/2014 - 00:02
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Your L3 switch is likely doing InterVlan routing.


#show ip protocols

This will show any dynamic routing protocols such as RIP, EIGRP, OSPF etc. You are probably not running any dynamic routing protocols, likely just Routing between Vlans.


#show protocols

This will show whether IP Routing is enabled globally on the L3 switch


Switch#sh protocols

Global values:

  Internet Protocol routing is enabled

Ankur Arora Tue, 02/04/2014 - 00:04
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Hi,


What do you see when you run show ip route on that switch?

Do you see any routes, any routing protocols?


IP Routing is NSF aware means that in your switch/router you have non-stop forwarding enabled, which prevents any disruption in traffic even in case of a reload as it segregates the control plane with the data plane.

It uses CEF to update the linecards about the FIB entries, which have the packet forwarding decision.


Thanks

Ankur


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