Vyatta is open-sorce routing solution running on x86 hardware. Router on a Stick - Vyatta 6.1 Core Configuration All frames seems to have correct 802.1 tags.ģ. I can't find a solution to this issue but according to Olive Clue multiple VLANs should not be working for em interfaces.įor this reason I recommend to use NIC i82559er which is working flawlessly (fxp show configurationĮncrypted-password "$1$zjHC5DHn$p1x2.U8FZjdXBPY/qsVvu1" # SECRET-DATA
#Router on a stick vlan Pc
Ping between PC 100 and PC 200 is successful at the time of configuration but after reboot of Olive, em3 interface is stacked in administratively shutdown state regardless of configuration. The configuration below is using Gigabit NIC e1000 (em interface). Router on a Stick - Juniper Configuration LiSA and Microcore hosts configuration is quite common for all Labs so I'm posting it only once.Įcho "ifconfig eth0 192.168.100.2 netmask 255.255.255.0" > /opt/bootlocal.shĮcho "route add default gw 192.168.100.1" > /opt/bootlocal.shĮcho "hostname PC100" > /opt/bootlocal.shĮcho "ifconfig eth1 192.168.200.2 netmask 255.255.255.0" > /opt/bootlocal.shĮcho "route add default gw 192.168.200.1" > /opt/bootlocal.shĮcho "hostname PC200" > /opt/bootlocal.shġ.3 Linux Multilayer Switch - LiSA configurationĬonfiguration shouldn't be a problem for people familiar with Cisco.Ģ. Linux Microcore host PC 100, PC 200 and LiSA Configuration I'm posting only one topology picture for all router-on-a-stick configurations but keep in mind Juniper should be replaced with particular type of router (Vyatta, Cisco) for following lab.ġ. There is Juniper on the picture doing intervlan routing between Vlan 100 and 200. Router-on-a-Stick Juniper - click image to enlarge VLAN 200 is configured on interface Ethernet 1 and it connects host PC200. Host PC100 is connected to interface Ethernet0 with VLAN100 configured on this interface. The VLAN 100 and VLAN200 are created on LiSA and interface Ethernet 3 is a trunk port with only VLAN 100 and 200 allowed on this port. I'm using LiSA Multilayer switch as layer 2 switch in this Lab for pure layer 2 switching - no layer 3 interfaces are configured on LiSA. The goal of this tutorial is to show Router-on-a-Stick configuration for different vendor products - Juniper, Cisco, Vyatta. Funny to say but Juniper shows speed 10M with half-duplex for interface fxp3 and Router-on-a-stick configuration is working. The router port must be Fast Ethernet or Gigabit Ethernet port because it must be able to receive and send frames at the same time - working in duplex mode. Router's job is routing between subnets and encapsulating frames with proper 802.1q tag according to VLAN-id configured on sub-interface. Each sub-interface is configured with IP subnet, VLAN-id and type of encapsulation (802.1q standard or proprietary Cisco ISL). Physical interface of router connected to switch is divided to multiple logical sub-interfaces. On opposite side of trunk there is a Router-on-a-Stick which needs to understand tagged 802.1q frames coming from trunk port of switch. VLAN-id field inside 802.1q tag is determined according to VLAN configured on switchport where a frame originally enters switch.
#Router on a stick vlan mac
The VLAN-ID information is placed in to 802.1 tag and a tag is added to original Ethernet frame right after source MAC address. This switch port is called a trunk port and frames sent through the trunk port must carry information about VLAN they are coming from. Instead of transferring frames from particular VLAN on dedicated switch port it exists a method which allows to send frames from multiple VLANs through one port of switch. This device is known as router and when it is connected with its only one interface to L2 switch this concept is called Router-on-a-Stick configuration. Layer 2 switch can't do routing between subnets and frames destined outside of VLAN must be sent to device which is capable of routing between VLAN. Each VLAN should have assigned its own IP address space - subnet. If they are hosts belonging to different VLANs it is not connectivity between hosts so it must be a mechanism which provides connectivity - routing between hosts on different VLANs. Hosts are grouped in to VLANs according to switch port configuration. Layer 2 switch is a network device which provides network access for hosts connected to its ports.
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