The link between Vyatta and Microcore (interface bond0) is configured to negotiate bundle using LACP (802.3ad) protocol.įigure 1 Distribution and Access Layer of Campus network - click image to enlarge Unlike Cisco switches, Cisco 3725 router can't negotiate Etherchannel using LACP or PAgP protocol therefore the ports in bundle have to be configured as static members of bundle (mode on) without possibility to act as the normal ethernet ports in a case of unsuccessful negotiation of bundle with an opposite side. Bonding can be set manually or can been negotiated using 802.3ad – Link Aggregation Control Protocol. Bonding brings redundancy and increase an available bandwidth using load-balance of a traffic over bundled inks. If one of the links in bundle fails, traffic is sent through another link. If the physical links are Layer2 links (STP is running over these links) either none of physical links is blocked by STP (Spanning Tree Protocol) or all the links in bundle are blocked because STP treats all the links like a single logical link. Both Dynamips and Qemu emulators are controlled by GNS3 network simulator.īonding - is known as an EtherChannel in Cisco terminology and it is aggregation of several network interfaces to single logical interface. Vyatta Core 6.1 router and Microcore 3.4.1 Linux router are placed in a Distribution Layer and are emulated by Qemu.
The Access Layer is L2 type and OSPF routing protocol is running between in Access and Distribution layer. Instead of Layer 2 switches in Access layer there is Cisco Router 3725 occupied with NM-16SW module in this layer and Cisco is emulated by Dynamips. A campus network (look at figure 1) is created with Access and Distribution layer. The tutorial shows EtherChanel, VRRP, DHCP and OSPF configuration on Cisco, Vyatta and Microcore Linux.
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