MPLS - L2MPLS / L2 Circuits

L2MPLS

L2 Circuits Before MPLS

MPLS Enabled Core:

Required:

Head office and Branch office to be interconnected on L2 which is of full redundancy on Service Provider Core Network

Configuration:

1. Select VLAN to use for the circuit. For our case we assign VLAN 200

note: Configuration only done on Edge Devices (PE)

2.Configure on PE-1

Defining presudowire class to MPLS;

#pseudowire-class ethernet-port

encapsulation mpls

#exit

Note: fa0/0 is the interface facing HQ

#show run int fa0/0.200

#interface FastEthernet0/0.200

#encapsulation dot1Q 200

#xconnect 3.3.3.3 200 pw-class ethernet-port

3. Configure on PE-3:

Defining presudowire class to MPLS;

#pseudowire-class ethernet-port

#encapsulation mpls

#exit

Note: fa0/0 is the interface facing HQ

# no shut

#interface FastEthernet0/0.200

#encapsulation dot1Q 200

#Xconnect 1.1.1.1 200 pw-class ethernet-port

Troubleshooting;

Make sure that the CEF is enabled on all P and PE routers

Make sure that MPLS and MTU is enabled on all required interfaces

Commands:

Show status of VPN neighbor;

#show mpls l2 vc

Benefits:

Less configurations

Easy to implement redundancy for L2 services.

Need to Know About L2MPLS

Not scalable!! . Reason why L3MPLS of VPLS is recommended where theres need for scalability.

Comments

Post a Comment

Popular posts from this blog

MPLS-VPN

Image
L3MPLS VPN Definitions: VRF – Virtual Routing Instance. Its an Instance of a routing table – Each customer has their own VRF defined with different definitions of RD and RT Route Distinguisher (RD); Used to uniquely identify routes belonging to a particular VRF. Route Targets (RT); Used to specify how routes are imported and exported from VRF. MP-BGP; Multiprotocol BGP- Used to carry BGP routes and VPN routes between PE Routers. Setup: Required; VPN to interconnect Head office to a branch office. 1. Define VRF, RD and RT VRF = Trust-Bank Route Distinguisher (RD): 37027:20 Route Targets (RT): 37027:20 PE1(config)#ip vrf Trust-Bank PE1(config-vrf)#rd 37027:20 PE1(config-vrf)#route-target both 37027:20 2. Enable VRF on the client facing interface on the PE routers and assign IP to be used to communicate to CE VRF = Trust-Bank R1(config)# int fastEthernet 0/0 R1(config-if)# ip vrf forwarding Trust-Bank R1(config-if)# ip add 192.168.2.1 255.255...
Read more

Linux Box as a DHCP Server

Image
Operating System: Centos 6.3 In this setup, client machines on the LAN are assigned IP addresses automatically unlike the previous setup where IP addresses were being assigned manually. To configure; Install dhcp package via terminal; [root@telweb]#  yum install dhcp* -y Copy the available sample dhcp configuration at /usr/share/doc/dhcp* [root@telweb]#  Cd  /usr/share/doc/dhcp* [root@telweb]#  Cp dhcpd.conf.sample /etc/dhcp/dhcpd.conf If asked to replace the existing dhcpd.conf at /etc/dhcp/ , answer with an yes. To configure the dhcp, edit the file /etc/dhcp/dhcp.conf [root@telweb]#  Vi /etc/dhcp/dhcpd.conf Go to the section highlighted below and edit it to suit your network; -------------------------------------------------------------------------------------------------------------------- # A slightly different configuration for an internal subnet. subnet  192.168.2.0  netmask  255.255.255.0  {   range...
Read more