Qtech QSW-3900-24-SFP-DC [83/245] Arp proxy configuration

QTECH Software Configuration Manual

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6.2.7 ARP proxy configuration

ARP requiry packet is broadcasting packet which cannot go through VLAN. If ARP proxy enables,

subVLANs of the same superVLAN can ARP exchanges. When ARP proxy disables, subVLANs of the same

superVLAN cannot communicate.

Use following command in global configuration command :

arp-proxy

no arp-proxy

It is defaulted to disable ARP proxy.

For example :

!Enable ARP proxy

QTECH(config)#arp-proxy

!Disable ARP proxy

QTECH(config)#no arp-proxy

6.2.8 Display interface configuration

Each created VLAN or superVLAN interface has its own configuration information, including : VLAN

number, IP address and netmask. Following command is used to display configuration information of all layer 3

interface, specified normal VLAN or superVLAN interface.

Display all layer 3 interface configuration information :

QTECH(config)#show ip interface

Display VLAN interface 2 configuration information :

QTECH(config)#show ip interface vlan-interface 2

Display superVLAN interface 3 configuration information :

QTECH(config)#show ip interface supervlan-interfac 3

6.3 Brief introduction of static routing

A static route is a special route that is manually configured by the network administrator. If a network’s

topology is simple, you only need configure static routes for the network to work normally. The proper configuration

and usage of static routes can improve a network’s performance and ensure bandwidth for important network

applications.

The disadvantage of using a static route is that, if a fault or a topological change occurs to the network, the

routes will be unavailable and the network breaks. In this case, the network administrator has to modify the static

routes manually.

6.3.1 Default Route

A router selects the default route only when it cannot find any matching entry in the routing table.

If the destination address of a packet fails to match any entry in the routing table, the router selects the

default route to forward the packet.

If there is no default route and the destination address of the packet fails to match any entry in the routing

table, the packet will be discarded and an ICMP packet will be sent to the source to report that the destination or the

network is unreachable.

You can create the default route with both destination and mask being 0.0.0.0, and some dynamic routing

protocols, such as OSPF, RIP and IS-IS, can also generate the default route.