User`s guide

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Management > Network Status > IP Hash Table
The router uses a routing hash table to improve IPv4 routing performance by reducing route
lookup times.
The IP hash table contains information on recently routed IP packets such as source and
destination IP address, IP protocol, etc. It also contains information on the interface and
gateway used when routing the IP packet.
When the router receives an IP packet to route, it will look in the IP hash table before
looking in the IPv4 routing table.
Whenever the IPv4 routing table changes (e.g. a route is added, deleted or modified), all
entries in the IP hash table are flushed out.
The IP hash table can be flushed manually using the “Flush” button.
Entries in the IP hash table are automatically deleted if it is not used for 10 seconds.
Src IP Address
The source IP address of the routed IP packet.
Src Port
The source TCP/UDP port of the routed IP packet. If the IP protocol is not TCP or UDP, then
this field is “0”.
Destination IP Address
The destination IP address of the routed IP packet.
Dest Port
The destination TCP/UDP port of the routed IP packet. If the IP protocol is not TCP or UDP,
then this field is “0”.
Next Hop
The next hop gateway to which the routed IP packet was sent to.
IP Protocol
The IP protocol field in the routed IP packet.
Interface
The interface that was used when the IP packet was routed.
Age
The age in seconds of the entry in the IP hash table.