Solved: Routing

jonk34567 · ‎01-14-2018

A router receives a packet with a destination address 72.44.69.254?however, no entry in the routing table exists for the network. then what will the router do ?

Julio E. Moisa · ‎01-14-2018

Hi

If there is no an entry into the routing table but there is a default route (0.0.0.0/0) it will send the packet through that path, the DF is also known as the last resort, now if you dont have an entry for that subnet or IP and default route either the packet will be discarded.

Hope it is useful

:-)

>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

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marce1000 · ‎01-14-2018

- Send it out through the default route.

M

-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !

Julio E. Moisa · ‎01-14-2018

Hi

If there is no an entry into the routing table but there is a default route (0.0.0.0/0) it will send the packet through that path, the DF is also known as the last resort, now if you dont have an entry for that subnet or IP and default route either the packet will be discarded.

Hope it is useful

:-)

>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

Harold Ritter · ‎01-14-2018

In addition to dropping the packet in the case there is no default route, as previously mentionned by Julio, the router also send and ICMP Destination Unreachable message back to the source of the packet.

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
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