Communication device for selecting route of packet
First Claim
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1. A communication device for selecting a route of a packet, comprising:
- a static routing table storing first routing information of a packet based on static routing;
a dynamic routing table storing second routing information of a packet obtained based on a dynamic routing protocol; and
a judging unit obtaining the first and second routing information of the packet from said static routing table and said dynamic routing table;
if failure do not occur in a static route as a route corresponding to the first routing information obtained from said static routing table, selecting the static route as a route to which the packet should be forwarded; and
selecting, if the failure occur in the static route, a dynamic route as a route corresponding to the second routing information obtained from said dynamic routing table, instead of the static route.
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Abstract
A communication device includes a static routing table, a dynamic routing table and a judging unit. The judging unit, if no failure occur in a static route, selects the static based on routing information given from the static routing table as a route to which a packet should be forwarded. The judging unit, whereas if the failure occur in the static route, selects a dynamic route base on routing information given from the dynamic routing table as a route to which the packet should be forwarded.
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Citations
32 Claims
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1. A communication device for selecting a route of a packet, comprising:
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a static routing table storing first routing information of a packet based on static routing;
a dynamic routing table storing second routing information of a packet obtained based on a dynamic routing protocol; and
a judging unit obtaining the first and second routing information of the packet from said static routing table and said dynamic routing table;
if failure do not occur in a static route as a route corresponding to the first routing information obtained from said static routing table, selecting the static route as a route to which the packet should be forwarded; and
selecting, if the failure occur in the static route, a dynamic route as a route corresponding to the second routing information obtained from said dynamic routing table, instead of the static route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22)
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21. A communication device for selecting a route of a packet, comprising:
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a plurality of static routing tables storing first routing information of the packet based on static routing;
a dynamic routing table storing second routing information of the packet obtained based on a dynamic routing protocol; and
a judging unit obtaining the first and second routing information of the packet from said static routing tables and said dynamic routing table;
if failure do not occur in all of static routes as routes corresponding to the first routing information, selecting any one of the static routes as a route to which the packet should be forwarded; and
selecting, if the failure occur in all the static routes, a dynamic route as a route corresponding to the second routing information obtained from said dynamic routing table, instead of the static routes.
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23. A method for selecting a route of a packet by a communication device, comprising steps of:
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providing a static routing table storing first routing information of the packet based on static routing, and a dynamic routing table storing second routing information of the packet obtained based on a dynamic routing protocol;
obtaining the first and second routing information from said static routing table and from said dynamic routing table; and
selecting, if failure do not occur in a static route as a route corresponding to the first routing information, a static route as a route to which the packet should be forwarded, and selecting, if the failure occur in the static route, a dynamic route as a route corresponding to the second routing information, instead of the static route. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A communication device for selecting a route of a packet, comprising:
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a first routing unit selecting a route for guaranteeing a communication quality of the packet; and
a second routing unit selecting a route for securing reachability of the packet, the route of the packet is selected by use of one of said first routing unit and said second routing unit in accordance with a predetermined condition.
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Specification