![]() & - replicated local route overrides by connectedĬ 10.255.255.118 is directly connected, Loopback100ġ92.168.66.0/24 is variably subnetted, 2 subnets, 2 masksĬ 192.168.66. + - replicated route, % - next hop override, p - overrides from PfR O - ODR, P - periodic downloaded static route, l - LISP H - NHRP, G - NHRP registered, g - NHRP registration summary If the loopback step fails, it might be because the TCP drivers are corrupted, the network. If the loopback step fails, it might be because the TCP drivers are corrupted, the network adapter might not be working, or another service is interfering with IP.). Ia - IS-IS inter area, * - candidate default, U - per-user static ping 127.0.0.1 (This is a 'loopback ping' - your computer trying to talk to itself. The system is a Hyper-V VM running 32bit Windows 10 Enterprise (version 1607 build 14393.693) as a guest OS. It will report a 'general failure', as below: Pinging 127.0.0.1 with 32 bytes of data: General failure. I - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 Further testing shows I can not ping 127.0.0.1, either. N - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2Į1 - OSPF external type 1, E2 - OSPF external type 2, m - OMP Routing Table: Mgmt-vrf Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGPĭ - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area NOTE: The router gateway have a static route towards the switch loopback 100, through int gi0/0 of management vrf Mgmt-vrf . Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 m If i ping without source address, no problem. Packet sent with a source address of 10.255.255.118 Sending 5, 100-byte ICMP Echos to 192.168.66.1, timeout is 2 seconds: I also read the link B.kablawi90 has provided ( Thanks,B.kablawi90) the WS-C3850-24XU loopback test failed seem to be relate to software issue. Switch#ping vrf Mgmt-vrf 192.168.66.1 source loopback 100 The WS-C3850-24XU 3 ports LED light were amber and both switches can ping. The interface loopback 100 is up, but when i ping the router gateway ip off the local network with source address loopback 100, the ping fails: When I down the loopback interface and try to ping my own IP, it's showing 100 packet loss, even when my eth0 is up. %LINK-3-UPDOWN: Interface Loopback100, changed state to up To use ping to verify that TCP/IP is working correctly, run the command: ping 127.0.0.1. %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback100, changed state to up This article provides steps to troubleshoot network connection issues by pinging the loopback address (127.0.0.1). %IOSXE_MGMTVRF-3-INTF_ATTACH_FAIL: Management VRF attach to mgmt loopback failed ![]() I'm trying to configure a interface loopback under default vrf Mgmt-vrf and the follow log appears:
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