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07-06-2017 05:18 AM - edited 07-06-2017 05:26 AM
07-06-2017 05:18 AM - edited 07-06-2017 05:26 AM
L3VPN MP-iBGP : MPLS Forward: Discarding
Hi there,
We are facing an issue with our L3VPN MP-BGP infrastructure.
We are working with about 30 "HPe FlexFabric 5930-2Slot+2QSFP+ JH178A", but we reproduce our problem on "HPe VSR1001" in GNS3.
A quick summary, two routers "HPe VSR1001 7.10.E0325" named "ARA-SVC-1" & "ARA-SVC-2" directly connected with two routed interfaces :
ARA-SVC-1 Ge15/0 <=>ARA-SVC-2 Ge15/0
ARA-SVC-1 Ge16/0 <=>ARA-SVC-2 Ge16/0
We are peering in iBGP (IPv4 and VPNv4). All routes are correctly propagated, but when we try to ping the LoopBack1 interface (in a VPN instance) from whichever switch, the packet is discarded directly by the sender.
We haven't the problem in the Loopback0 (without VPN instance).
We try :
- with an real interface : Same issue
- with only one interface : Same issue
- in eBGP : No problem
Any advice ?
Thanks
Error sent by the switch in debug :
*Jul 5 11:50:50:327 2017 ARA-SVC-2 MPLSFW/7/MPLSFW: MPLS Forward: Receiving IP packet, len = 84, s = 1.1.1.2, d = 1.1.1.1, TOS = 0, TTL = 255. *Jul 5 11:50:50:327 2017 ARA-SVC-2 MPLSFW/7/MPLSFW: MPLS Forward: Discarding because failed to get fwd info by NID 4294967295!
Configurations :
ARA-SVC-1 :
# ip vpn-instance VR_OT_LEGACY_BACKUP route-distinguisher 65300:3 description VRF OT - BACKUP LEGACY vpn-target 65300:3 import-extcommunity vpn-target 65300:3 export-extcommunity # router id 10.201.18.1 # mpls lsr-id 10.201.18.1 # ip unreachables enable ip ttl-expires enable ip icmp source 10.201.18.1 ip icmp source vpn-instance VR_OT_LEGACY_BACKUP 1.1.1.1 # interface LoopBack0 description UNDERLAY - Loopback ip address 10.201.18.1 255.255.255.255 # interface LoopBack1 ip binding vpn-instance VR_OT_LEGACY_BACKUP ip address 1.1.1.1 255.255.255.255 # # interface GigabitEthernet15/0 port link-mode route description ARA-SVC-2_15/0_iBGP ip address 10.201.8.1 255.255.255.254 mpls enable # interface GigabitEthernet16/0 port link-mode route description ARA-SVC-2_16/0_iBGP ip address 10.201.8.3 255.255.255.254 mpls enable # bgp 64601 router-id 10.201.18.1 group GROUP-IBGP internal peer GROUP-IBGP description iBGP peer GROUP-IBGP route-update-interval 0 peer GROUP-IBGP timer keepalive 3 hold 9 peer 10.201.8.0 group GROUP-IBGP peer 10.201.8.0 description ARA-SVC-2_15/0_iBGP peer 10.201.8.0 connect-interface GigabitEthernet15/0 peer 10.201.8.0 bfd single-hop peer 10.201.8.2 group GROUP-IBGP peer 10.201.8.2 description ARA-SVC-2_16/0_iBGP peer 10.201.8.2 connect-interface GigabitEthernet16/0 peer 10.201.8.2 bfd single-hop # address-family ipv4 unicast default-route imported balance eibgp 8 import-route direct route-policy DIRECTLY-CONNECTED-LOOPBACK import-route static peer GROUP-IBGP enable peer GROUP-IBGP route-policy FROM_UND_SVC import peer GROUP-IBGP route-policy TO_UND_SVC export # address-family vpnv4 undo policy vpn-target peer GROUP-IBGP enable peer GROUP-IBGP route-policy FROM_VPN_SVC import peer GROUP-IBGP route-policy TO_VPN_SVC export peer GROUP-IBGP next-hop-local # ip vpn-instance VR_OT_LEGACY_BACKUP # address-family ipv4 unicast default-route imported balance ebgp 8 import-route direct import-route static # route-policy DIRECTLY-CONNECTED-LOOPBACK permit node 1 if-match interface LoopBack0 # route-policy DIRECTLY-CONNECTED-LOOPBACK deny node 100 # route-policy FROM_UND_SVC permit node 100 # route-policy FROM_VPN_SVC permit node 10 if-match extcommunity 1 apply local-preference 50 # route-policy FROM_VPN_SVC deny node 100 # route-policy TO_UND_SVC permit node 100 # route-policy TO_VPN_SVC permit node 10 if-match extcommunity 1 # route-policy TO_VPN_SVC deny node 100 # ip extcommunity-list 1 permit rt 65300:3 #
ARA-SVC-2 :
# ip vpn-instance VR_OT_LEGACY_BACKUP route-distinguisher 65300:3 description VRF OT - BACKUP LEGACY vpn-target 65300:3 import-extcommunity vpn-target 65300:3 export-extcommunity # router id 10.201.18.2 # mpls lsr-id 10.201.18.2 # ip unreachables enable ip ttl-expires enable ip icmp source 10.201.18.2 ip icmp source vpn-instance VR_OT_LEGACY_BACKUP 1.1.1.2 # interface LoopBack0 description UNDERLAY - Loopback ip address 10.201.18.2 255.255.255.255 # interface LoopBack1 ip binding vpn-instance VR_OT_LEGACY_BACKUP ip address 1.1.1.2 255.255.255.255 # # interface GigabitEthernet15/0 port link-mode route description ARA-SVC-1_15/0_iBGP ip address 10.201.8.0 255.255.255.254 mpls enable # interface GigabitEthernet16/0 port link-mode route description ARA-SVC-1_16/0_iBGP ip address 10.201.8.2 255.255.255.254 mpls enable # bgp 64601 router-id 10.201.18.2 group GROUP-IBGP internal peer GROUP-IBGP description iBGP peer GROUP-IBGP route-update-interval 0 peer GROUP-IBGP timer keepalive 3 hold 9 peer 10.201.8.1 group GROUP-IBGP peer 10.201.8.1 description ARA-SVC-1_15/0_iBGP peer 10.201.8.1 connect-interface GigabitEthernet15/0 peer 10.201.8.1 bfd single-hop peer 10.201.8.3 group GROUP-IBGP peer 10.201.8.3 description ARA-SVC-1_15/0_iBGP peer 10.201.8.3 connect-interface GigabitEthernet16/0 peer 10.201.8.3 bfd single-hop # address-family ipv4 unicast default-route imported balance eibgp 8 import-route direct route-policy DIRECTLY-CONNECTED-LOOPBACK import-route static peer GROUP-IBGP enable peer GROUP-IBGP route-policy FROM_UND_SVC import peer GROUP-IBGP route-policy TO_UND_SVC export # address-family vpnv4 undo policy vpn-target peer GROUP-IBGP enable peer GROUP-IBGP route-policy FROM_VPN_SVC import peer GROUP-IBGP route-policy TO_VPN_SVC export peer GROUP-IBGP next-hop-local # ip vpn-instance VR_OT_LEGACY_BACKUP # address-family ipv4 unicast default-route imported balance ebgp 8 import-route direct import-route static # route-policy DIRECTLY-CONNECTED-LOOPBACK permit node 1 if-match interface LoopBack0 # route-policy DIRECTLY-CONNECTED-LOOPBACK deny node 100 # route-policy FROM_UND_SVC permit node 100 # route-policy FROM_VPN_SVC permit node 10 if-match extcommunity 1 apply local-preference 50 # route-policy FROM_VPN_SVC deny node 100 # route-policy TO_UND_SVC permit node 100 # route-policy TO_VPN_SVC permit node 10 if-match extcommunity 1 # route-policy TO_VPN_SVC deny node 100 # ip extcommunity-list 1 permit rt 65300:3 #
Routes and PING tests :
<ARA-SVC-1>display bgp routing-table vpnv4 BGP local router ID is 10.201.18.1 Status codes: * - valid, > - best, d - dampened, h - history, s - suppressed, S - stale, i - internal, e - external Origin: i - IGP, e - EGP, ? - incomplete Total number of routes from all PEs: 2 Route distinguisher: 65300:3(VR_OT_LEGACY_BACKUP) Total number of routes: 3 Network NextHop MED LocPrf PrefVal Path/Ogn * > 1.1.1.1/32 127.0.0.1 0 32768 ? * >i 1.1.1.2/32 10.201.8.0 0 50 0 ? * i 10.201.8.2 0 50 0 ?
<ARA-SVC-1>ping -vpn-instance VR_OT_LEGACY_BACKUP 1.1.1.2 Ping 1.1.1.2 (1.1.1.2): 56 data bytes, press CTRL_C to break Request time out Request time out Request time out Request time out Request time out --- Ping statistics for 1.1.1.2 in VPN instance VR_OT_LEGACY_BACKUP --- 5 packets transmitted, 0 packets received, 100.0% packet loss <ARA-SVC-1>
<ARA-SVC-2>display bgp routing-table vpnv4 BGP local router ID is 10.201.18.2 Status codes: * - valid, > - best, d - dampened, h - history, s - suppressed, S - stale, i - internal, e - external Origin: i - IGP, e - EGP, ? - incomplete Total number of routes from all PEs: 2 Route distinguisher: 65300:3(VR_OT_LEGACY_BACKUP) Total number of routes: 3 Network NextHop MED LocPrf PrefVal Path/Ogn * >i 1.1.1.1/32 10.201.8.1 0 50 0 ? * i 10.201.8.3 0 50 0 ? * > 1.1.1.2/32 127.0.0.1 0 32768 ?
<ARA-SVC-2>display bgp routing-table ipv4 vpn-instance VR_OT_LEGACY_BACKUP Total number of routes: 3 BGP local router ID is 10.201.18.2 Status codes: * - valid, > - best, d - dampened, h - history, s - suppressed, S - stale, i - internal, e - external Origin: i - IGP, e - EGP, ? - incomplete Network NextHop MED LocPrf PrefVal Path/Ogn * >i 1.1.1.1/32 10.201.8.1 0 50 0 ? * i 10.201.8.3 0 50 0 ? * > 1.1.1.2/32 127.0.0.1 0 32768 ?
<ARA-SVC-2>ping -vpn-instance VR_OT_LEGACY_BACKUP 1.1.1.1 Ping 1.1.1.1 (1.1.1.1): 56 data bytes, press CTRL_C to break Request time out Request time out Request time out Request time out Request time out --- Ping statistics for 1.1.1.1 in VPN instance VR_OT_LEGACY_BACKUP --- 5 packets transmitted, 0 packets received, 100.0% packet loss <ARA-SVC-2>