We often have to cross in real life vlan to communicate, we have a single-arm routing solutions, but there are significant limitations-arm routing, bandwidth, forwarding efficiency, so-arm routing with a bit less, so With this section
On the basis of the original three switches on the switcher, adds routing functionality, and because the data is not as physical line is routed through one arm like routing, a good solution to the bandwidth bottleneck, provides a flexible network design solution.
VLANIF interface is an interface based on the network layer, the IP address can be configured. Through VLANIF interfaces three switches will be able to achieve routing forwarding.
Experimental simulation:
The experimental simulation of the corporate network scenario. The company has two departments - Sales and Customer Service Department, are planning to use VLAN10 and VLAN 20. Wherein the sales terminal with two men and PC-1 PC-2, men have a customer terminal 3 a PC. All terminals are connected by a layer 3 switch sl. You are required to enable the company to achieve all three hosts can access each other. Network administrators will be achieved by configuring Layer 3 switch.
Build lab topology
Experimental configuration
Test connectivity between PC1 and PC2 (on between unexpected and PC3, after all, not a network segment, certainly can not pass, because not find a segment of time will be sent to the gateway, we can not set the switch, there is no this ARP request response)
Let us first look at division VLAN, and configure access interfaces (a total of three configured interfaces, I'll show a screen shot, hee hee)
Now need to communicate through the routing between the VLAN, and VLANIF interfaces on Layer 3 switches
Create VLANIF interface VLANif command interface, the interface corresponding to the specified ID VLANIF
After configuration, interface status check
Two VLANIF interfaces can be seen already in force, we look to ping PC1 and PC3 (nice! Can ping, we have achieved using the three switches to achieve inter-VLAN communication)
We can look at the arp PC1 information, found that only gateway address, indicating that indeed by ARP broadcast on the switch
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