Thank you Sam,

do you mean that i need to configure two VLANs on the WAN link "one for each circuit".

what is the required IOS "Base or service..."?

i dont have MPLS eqperiance, but i only understand the example in the link above"

Is that enough? (like i will create on the first switch VRF for customer A and VRF on the VLAN of the WAN link)?

do i need BGP? or just VRFs and routing protocol like between the VRFs?

Thanks

Ahmad

Ahmad,

full image is c3750-advipservicesk9-mz.122-25.SEC2.bin u need to check if its still supported. in any case it supports vrf lite.

I assume in your drawing. 3560's are really the 3750 where u need vrf lite and the 300Mb is offered over Gigabit Ethernet port ?

I would use BGP (remember route reflectors).

HTH

Sam

hi Sam,

yes the 300Mb is offered over Giga Ethernet.

yes i will use the 3750 switches.

why do i need BGP?

i am thinking to use VRF in the switches with ospf

Example:

ip vrf Net1

description Net1

rd 1:1

route-target export 1:1

route-target import 1:1

interface G0/0

description connection to LAN1

no switchport

ip vrf forwarding Net1

ip address 172.16.1.1 255.255.255.0

interface G0/1

switchport mode trunk

description connection to the 300M

interface Vlan111

ip vrf forwarding Net1

ip address 172.16.7.1 255.255.255.0

!

router ospf 1 vrf Net1

network 172.16.1.0 0.0.0.255 area 0

network 172.16.7.0 0.0.0.255 area 0

Anas

Hi Anas

OSPF is fine for PE-CE routing, what about PE-PE ? Unless you will have one PE for primary line and one for backup line.

take a look at this document:

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/50sg/configuration/guide/vrf.html

you also need to decide how you will manage your CPEs (if they are managed by you). One method is to have an additional management vrf.

HTH

Sam

Hi Sam,

The provider will just provide layer 2 leased lines to the two location, i will provide the 3750 switches and configure the VRF-lite on it.

so i think the 3750 will work as a PE's and the LAN switches 6509's will work as a CE's.

i am thinking as you suggest to configure the WAN links as a trunks and terminate the the VLANs on separate VRFs on the 3750 switches.

but the confused thing is why do i need BGP in this case.

Thanks and regards,

Anas

configuring trunk, and SVI PE terminated in a vrf is a must. I think you agree on this.

this will take care of routing between CE and PE...but how will routes from CE1 been propagated to CE2 ? you need PE1 to advertise them to PE2, which leads to how will you route between PE1 and PE2.

CE1<-vrf-lite->PE1<---->PE2<-vrf-lite->CE2

as stand corrected, as far as I know you need to have MPLS based VRF between PE1 and PE2 and therefore BGP to carry VPN4 prefixes and this is how I have implemented.

However if you have following setup, u will not need BGP.

CE1-3750A-3750B-3750C-CE2

make 3750-B PE and use 3750A and 3750-C as switching vlan from CE1 to CE2. so 3750-B has routes for both locations withing it vrf table.

HTH

Sam

Hi Sam,

i think if i configure BGP then the network will be as a full MPLS.

i think without BGP, the routes from CE's in the two locations will be propagated using OSPF, because OSPF adjacency will be built as follow:

CE(first site)---VRF (3750-1)---VRF of WAN(3750-1)--- VRF of WAN(3750-2)--- VRF (3750-2)--- CE(second site)

Is that right, or the BGP is must configured

Thanks

Ahmad

Yes it will work with no BGP !

HTH

Sam

Hi

I have a similar position with one exception, I had to run MST and VTPv3 on my networks therefore all IOS related to C3750G-12S switches upgraded to 12.2(55)SE12 series to run VTPv3, MST and OSPFv2 simultaneously. I wanna set up VRF, but apparently it does not support this feature.

Is there any version which can support my needs?

BR