We’ll configure XR12 to peer with CSR1. The data plane does not work due to XRs inability to switch the traffic at layer 2. We’ll just focus on the peering and verification of the label bindings.
CSR1
xconnect 192.0.2.12 2 encapsulation mpls
%LDP-5-NBRCHG: LDP Neighbor 192.0.2.12:0 (3) is UP
XR12
interface GigabitEthernet0/0/0/2
no shutdown
l2transport
!
!
l2vpn
xconnect group P2P
p2p xconnect
interface GigabitEthernet0/0/0/2
neighbor ipv4 192.0.2.1 pw-id 2
!
%ROUTING-LDP-5-NBR_CHANGE : VRF 'default' (0x60000000), Neighbor 192.0.2.1:0 is UP (IPv4 connection)
CSR1#show xconnect all
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi3:9(Ethernet) UP mpls 192.0.2.12:2 UP
RP/0/0/CPU0:XR12#show l2vpn xconnect
Sun Sep 1 23:24:00.601 UTC
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
SB = Standby, SR = Standby Ready, (PP) = Partially Programmed
XConnect Segment 1 Segment 2
Group Name ST Description ST Description ST
------------------------ ----------------------------- -----------------------------
P2P xconnect UP Gi0/0/0/2 UP 192.0.2.1 2 UP
----------------------------------------------------------------------------------------
Initially we see the peering come online and that both ends of the connection are operational from a control plane perspective.
CSR1#show xconnect peer 192.0.2.12 vcid 2 detail
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi3:9(Ethernet) UP mpls 192.0.2.12:2 UP
Interworking: none Local VC label 68
Remote VC label 24030
RP/0/0/CPU0:XR12#show l2vpn xconnect detail
Sun Sep 1 23:25:26.536 UTC
Group P2P, XC xconnect, state is up; Interworking none
AC: GigabitEthernet0/0/0/2, state is up
Type Ethernet
MTU 1500; XC ID 0x1; interworking none
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
PW: neighbor 192.0.2.1, PW ID 2, state is up ( established )
PW class not set, XC ID 0xff000001
Encapsulation MPLS, protocol LDP
Source address 192.0.2.12
PW type Ethernet, control word disabled, interworking none
PW backup disable delay 0 sec
Sequencing not set
PW Status TLV in use
MPLS Local Remote
------------ ------------------------------ -----------------------------
Label 24030 68
Group ID 0x400 unknown
Interface GigabitEthernet0/0/0/2 unknown
MTU 1500 1500
Control word disabled disabled
PW type Ethernet Ethernet
VCCV CV type 0x2 0x2
(LSP ping verification) (LSP ping verification)
VCCV CC type 0x6 0x6
(router alert label) (router alert label)
(TTL expiry) (TTL expiry)
------------ ------------------------------ -----------------------------
Incoming Status (PW Status TLV):
Status code: 0x0 (Up) in Notification message
Outgoing Status (PW Status TLV):
Status code: 0x0 (Up) in Notification message
MIB cpwVcIndex: 4278190081
Create time: 01/09/2019 23:22:18 (00:03:07 ago)
Last time status changed: 01/09/2019 23:22:24 (00:03:02 ago)
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
Like we saw in the previous post, both CSR1 and XR12 allocate labels for the L2 circuit. CSR1 allocates label 68 and XR12 allocates label 24030.
IOS17#ping 10.100.1.22
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.100.1.22, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
CSR1#show mpls forwarding-table labels 68
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
68 No Label l2ckt(2) 0 Gi3 point2point
RP/0/0/CPU0:XR12#show mpls forwarding interface g0/0/0/2
Sun Sep 1 23:29:31.969 UTC
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
24030 Pop PW(192.0.2.1:2) Gi0/0/0/2 point2point 0
A ping is sent from IOS17 to XR12 and no replies are received. We check the LFIB of both devices and see no hits.
CSR1
xconnect 192.0.2.12 2 encapsulation mpls
%LDP-5-NBRCHG: LDP Neighbor 192.0.2.12:0 (3) is UP
XR12
interface GigabitEthernet0/0/0/2
no shutdown
l2transport
!
!
l2vpn
xconnect group P2P
p2p xconnect
interface GigabitEthernet0/0/0/2
neighbor ipv4 192.0.2.1 pw-id 2
!
%ROUTING-LDP-5-NBR_CHANGE : VRF 'default' (0x60000000), Neighbor 192.0.2.1:0 is UP (IPv4 connection)
CSR1#show xconnect all
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi3:9(Ethernet) UP mpls 192.0.2.12:2 UP
RP/0/0/CPU0:XR12#show l2vpn xconnect
Sun Sep 1 23:24:00.601 UTC
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
SB = Standby, SR = Standby Ready, (PP) = Partially Programmed
XConnect Segment 1 Segment 2
Group Name ST Description ST Description ST
------------------------ ----------------------------- -----------------------------
P2P xconnect UP Gi0/0/0/2 UP 192.0.2.1 2 UP
----------------------------------------------------------------------------------------
Initially we see the peering come online and that both ends of the connection are operational from a control plane perspective.
CSR1#show xconnect peer 192.0.2.12 vcid 2 detail
Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State
UP=Up DN=Down AD=Admin Down IA=Inactive
SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP pri ac Gi3:9(Ethernet) UP mpls 192.0.2.12:2 UP
Interworking: none Local VC label 68
Remote VC label 24030
RP/0/0/CPU0:XR12#show l2vpn xconnect detail
Sun Sep 1 23:25:26.536 UTC
Group P2P, XC xconnect, state is up; Interworking none
AC: GigabitEthernet0/0/0/2, state is up
Type Ethernet
MTU 1500; XC ID 0x1; interworking none
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
PW: neighbor 192.0.2.1, PW ID 2, state is up ( established )
PW class not set, XC ID 0xff000001
Encapsulation MPLS, protocol LDP
Source address 192.0.2.12
PW type Ethernet, control word disabled, interworking none
PW backup disable delay 0 sec
Sequencing not set
PW Status TLV in use
MPLS Local Remote
------------ ------------------------------ -----------------------------
Label 24030 68
Group ID 0x400 unknown
Interface GigabitEthernet0/0/0/2 unknown
MTU 1500 1500
Control word disabled disabled
PW type Ethernet Ethernet
VCCV CV type 0x2 0x2
(LSP ping verification) (LSP ping verification)
VCCV CC type 0x6 0x6
(router alert label) (router alert label)
(TTL expiry) (TTL expiry)
------------ ------------------------------ -----------------------------
Incoming Status (PW Status TLV):
Status code: 0x0 (Up) in Notification message
Outgoing Status (PW Status TLV):
Status code: 0x0 (Up) in Notification message
MIB cpwVcIndex: 4278190081
Create time: 01/09/2019 23:22:18 (00:03:07 ago)
Last time status changed: 01/09/2019 23:22:24 (00:03:02 ago)
Statistics:
packets: received 0, sent 0
bytes: received 0, sent 0
Like we saw in the previous post, both CSR1 and XR12 allocate labels for the L2 circuit. CSR1 allocates label 68 and XR12 allocates label 24030.
IOS17#ping 10.100.1.22
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.100.1.22, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
CSR1#show mpls forwarding-table labels 68
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
68 No Label l2ckt(2) 0 Gi3 point2point
RP/0/0/CPU0:XR12#show mpls forwarding interface g0/0/0/2
Sun Sep 1 23:29:31.969 UTC
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
24030 Pop PW(192.0.2.1:2) Gi0/0/0/2 point2point 0
A ping is sent from IOS17 to XR12 and no replies are received. We check the LFIB of both devices and see no hits.
