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Hi Guillaume,
But hey - this is a virtual router running in a virtual environment, right? There should not be a problem adding two virtual interfaces bridged by the virtual environment! Consider the following topology:
Here, Gi3 and Gi4 are interfaces that are connected together by the environment (KVM or VMWare) in which the CSRv runs. Now assume that Gi2 and Gi3 are in the same bridge-domain, and the PPPoE server instance is started on Gi4. The bridge-domain will bridge frames coming from Gi2 onto Gi3, and they will be further delivered to Gi4 - and vice versa. It's a hack, yes - but I've just tested this in VIRL and it worked just nice!
So this should be possible for you, too. You want to terminate pseudowires in your bridge-domain which is fine. You should add two more interfaces on your CSRv, with one of them becoming a member of the bridge-domain, the other running the PPPoE server, and the KVM/VMWare bridging those two interfaces together.
Just for clarity, this was my quick-and-dirty config on the CSRv that worked:
bridge-domain 1 member GigabitEthernet2 service-instance 1 member GigabitEthernet3 service-instance 1 ! bba-group pppoe PPP virtual-template 1 ! interface Loopback0 ip address 192.0.2.1 255.255.255.255 ! interface GigabitEthernet2 description => To a client <= no ip address negotiation auto service instance 1 ethernet encapsulation untagged ! ! interface GigabitEthernet3 description => To myself <= no ip address negotiation auto service instance 1 ethernet encapsulation untagged ! ! interface GigabitEthernet4 no ip address negotiation auto pppoe enable group PPP ! interface Virtual-Template1 ip unnumbered Loopback0 peer default ip address pool IPs ! ip local pool IPs 192.0.2.11 192.0.2.100
Would you mind testing this?
Best regards,
Peter
Guillaume,
I was definitely able to get this going successfully. This is my setup:
Client was configured as a trivial PPPoE client:
hostname Client ! interface GigabitEthernet0/1 no ip address duplex auto speed auto media-type rj45 pppoe enable pppoe-client dial-pool-number 1 ! interface Dialer0 ip address negotiated encapsulation ppp dialer pool 1
Agg was configured to create a simple MPLS pseudowire, transporting all received Ethernet frames on Gi0/1 to the PPPoE box and vice versa:
hostname Agg ! mpls label protocol ldp ! interface Loopback0 ip address 198.51.100.1 255.255.255.255 ip ospf 1 area 0 ! interface GigabitEthernet0/1 description => To the Client <= no ip address duplex auto speed auto media-type rj45 xconnect 198.51.100.2 1 encapsulation mpls ! interface GigabitEthernet0/2 description => To the PPPoE server on CSRv <= ip address 192.0.2.1 255.255.255.0 ip ospf 1 area 0 duplex auto speed auto media-type rj45 mpls ip ! mpls ldp router-id Loopback0 force
The CSRv was configured with the hostname "PPPoE", and was configured with the VFI you intended, and a simple PPPoE server instance:
hostname PPPoE mpls label protocol ldp ! bridge-domain 1 ! l2 vfi PPP-test manual vpn id 1 bridge-domain 1 neighbor 198.51.100.1 encapsulation mpls ! bba-group pppoe PPP virtual-template 1 ! interface Loopback0 ip address 198.51.100.2 255.255.255.255 ip ospf 1 area 0 ! interface Loopback1 ip address 10.0.0.1 255.255.255.255 ! interface GigabitEthernet2 description => To the Agg <= ip address 192.0.2.2 255.255.255.0 ip ospf 1 area 0 negotiation auto mpls ip ! interface GigabitEthernet3 description => To myself Gi4 over a transparent bridge <= no ip address negotiation auto service instance 1 ethernet encapsulation untagged bridge-domain 1 ! ! interface GigabitEthernet4 description => To myself Gi3 over a transparent bridge <= no ip address negotiation auto pppoe enable group PPP ! interface Virtual-Template1 ip unnumbered Loopback1 peer default ip address pool IPs ! ip local pool IPs 10.0.0.11 10.0.0.200 ! mpls ldp router-id Loopback0 force
Because I was doing this setup in VIRL, and VIRL does not allow two interfaces of a router to be connected to the same network (it's trying to be smart but here, it's kind of stupid), I have created the "loop" between the Gi3 and Gi4 on the CSRv using an additional router with two interfaces, performing common bridging:
hostname Bridge ! bridge irb ! interface GigabitEthernet0/1 description => To PPPoE Gi3 <= no ip address duplex auto speed auto media-type rj45 bridge-group 1 bridge-group 1 spanning-disabled ! interface GigabitEthernet0/2 description => To PPPoE Gi4 <= no ip address duplex auto speed auto media-type rj45 bridge-group 1 bridge-group 1 spanning-disabled
And voila - it works!
Client(config)# do show ip int brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 unassigned YES unset administratively down down
GigabitEthernet0/1 unassigned YES unset up up
Dialer0 unassigned YES IPCP administratively down down
Virtual-Access1 unassigned YES unset down down
Client(config)# int di0
Client(config-if)# no shut
Client(config-if)#
*Aug 15 13:17:16.092: %LINK-3-UPDOWN: Interface Dialer0, changed state to up
*Aug 15 13:17:35.598: %DIALER-6-BIND: Interface Vi1 bound to profile Di0
*Aug 15 13:17:35.599: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
*Aug 15 13:17:35.666: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up
Client(config-if)#do show ip int brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 unassigned YES unset administratively down down
GigabitEthernet0/1 unassigned YES unset up up
Dialer0 10.0.0.14 YES IPCP up up
Virtual-Access1 unassigned YES unset up up
Client(config-if)#do show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is not set
10.0.0.0/32 is subnetted, 2 subnets
C 10.0.0.1 is directly connected, Dialer0
C 10.0.0.14 is directly connected, Dialer0
Client(config-if)#do ping 10.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 6/16/31 ms
Client(config-if)#
Client(config-if)# do show pppoe session
1 client session
Uniq ID PPPoE RemMAC Port VT VA State
SID LocMAC VA-st Type
N/A 4 fa16.3e77.daa6 Gi0/1 Di0 Vi1 UP
fa16.3eb7.309d UP
Client(config-if)#
And on PPPoE server at CSRv:
PPPoE# show ppp all
Interface/ID OPEN+ Nego* Fail- Stage Peer Address Peer Name
------------ --------------------- -------- --------------- --------------------
Vi1.1 LCP+ IPCP+ LocalT 10.0.0.14
PPPoE# show pppoe session
1 session in LOCALLY_TERMINATED (PTA) State
1 session total
Uniq ID PPPoE RemMAC Port VT VA State
SID LocMAC VA-st Type
4 4 fa16.3eb7.309d Gi4 1 Vi1.1 PTA
fa16.3e77.daa6 UP
PPPoE#
So if the configuration above (except the Bridge) does not work for you then I suspect the VirtualBox to be the problem.
Let me ask you: In what hypervisor is the production CSRv being run? Is it KVM, or is it VMware? I do not suppose you are running VirtualBox to run a production CSRv.
I am sure we can get this done and going :)
Best regards,
Peter
