Hi Xyxue, The L2 cross connect CLI via either xconnect or xcrw would put the source/input interface into L2 mode and setup an one-directional cross connect to the specified peer/output interface. The expectation is there should be a xcrw/cross connect CLI for the other direction specifying the other interface as source/input so it will also be in L2 mode.
Hope this help, with regards, John From: 薛欣颖 <xy...@fiberhome.com> Sent: Wednesday, May 16, 2018 3:46 AM To: John Lo (loj) <l...@cisco.com>; Neale Ranns (nranns) <nra...@cisco.com>; vpp-dev <vpp-dev@lists.fd.io> Subject: Re: Re: [vpp-dev] problem in xcrw testing Hi John, The description of 'set interface l2 xcrw' in docs is that 'Add or delete a Layer 2 to Layer 3 rewrite cross-connect'. After put the gre tunnel in l2 mode , there is a 'Layer 2 to Layer 2 rewrite cross-connect'. Is there anything wrong in my comprehension? Thanks, Xyxue ________________________________ From: John Lo (loj)<mailto:l...@cisco.com> Date: 2018-05-15 20:32 To: 薛欣颖<mailto:xy...@fiberhome.com>; Neale Ranns (nranns)<mailto:nra...@cisco.com>; vpp-dev<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] problem in xcrw testing The GRE tunnel needs to be put in L2 mode so it can be a valid l2-output interface. You can do that by putting the GRE tunnel into a bridge domain, or xconnect it to peer interface: vpp# set int l2 bri ? set interface l2 bridge set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg] vpp# set int l2 xconnect ? set interface l2 xconnect set interface l2 xconnect <interface> <peer interface> Regards, John From: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> On Behalf Of xyxue Sent: Tuesday, May 15, 2018 8:10 AM To: Neale Ranns (nranns) <nra...@cisco.com<mailto:nra...@cisco.com>>; vpp-dev <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Subject: Re: [vpp-dev] problem in xcrw testing Hi Neale， After I changed my configuration (the configuration and the trace info is shown below) create host-interface name eth1 mac 00:50:56:3a:32:d2 create host-interface name eth5 mac 00:50:56:31:35:92 set interface ip address host-eth1 11.1.1.2/24 create gre tunnel src 11.1.1.2 dst 11.1.1.1 teb set interface l2 xcrw host-eth5 next teb-gre0-output rw 4500005800000000fd2fa5720b0101020b01010100006558 VPP# show trace ------------------- Start of thread 0 vpp_main ------------------- Packet 1 00:01:18:847131: af-packet-input af_packet: hw_if_index 2 next-index 4 tpacket2_hdr: status 0x20000001 len 78 snaplen 78 mac 66 net 80 sec 0x5afaa73c nsec 0x2c4032d7 vlan 0 00:01:18:847197: ethernet-input IP4: 00:50:56:c0:00:05 -> 00:50:56:c0:00:04 00:01:18:847305: l2-input l2-input: sw_if_index 2 dst 00:50:56:c0:00:04 src 00:50:56:c0:00:05 00:01:18:847323: l2-output l2-output: sw_if_index 4 dst 00:50:56:c0:00:04 src 00:50:56:c0:00:05 data 08 00 45 01 00 40 00 01 00 00 40 01 00:01:18:847336: error-drop l2-output: L2 Output interface not valid It doesn't seem to be in effect. Is there something I missed? Thanks, Xyxue ________________________________ From: Neale Ranns<mailto:nra...@cisco.com> Date: 2018-05-15 15:58 To: 薛欣颖<mailto:xy...@fiberhome.com>; vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] problem in xcrw testing Hi Xyxue, The GRE tunnel needs to be in L2 mode, which in the case of GRE is known as ‘transparent ethernet bridging’. So: create gre tunnel src 11.1.1.2 dst 11.1.1.1 teb /neale From: <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> on behalf of xyxue <xy...@fiberhome.com<mailto:xy...@fiberhome.com>> Date: Tuesday, 15 May 2018 at 08:50 To: "vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>" <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Subject: [vpp-dev] problem in xcrw testing Hi guys， I’m testing the xcrw . But the packet were 'error-drop'. My configuration and trace info is shown below: create host-interface name eth1 mac 00:50:56:3a:32:d2 create host-interface name eth5 mac 00:50:56:31:35:92 set interface ip address host-eth1 11.1.1.2/24 create gre tunnel src 11.1.1.2 dst 11.1.1.1 set interface ip address gre0 100.1.1.2/24 VPP# set interface l2 xcrw host-eth5 next gre4-input rw 4500005800000000fd2fa5720b0101020b01010100006558 VPP# set interface l2 xcrw xcrw0 next host-eth1-output rw 1234 VPP# show trace ------------------- Start of thread 0 vpp_main ------------------- Packet 1 00:00:22:692356: af-packet-input af_packet: hw_if_index 2 next-index 4 tpacket2_hdr: status 0x20000001 len 78 snaplen 78 mac 66 net 80 sec 0x5af559c7 nsec 0x8bb04a9 vlan 0 00:00:22:692493: ethernet-input IP4: 00:50:56:c0:00:05 -> 00:50:56:31:35:92 00:00:22:692706: l2-input l2-input: sw_if_index 2 dst 00:50:56:31:35:92 src 00:50:56:c0:00:05 00:00:22:692724: l2-output l2-output: sw_if_index 4 dst 00:50:56:31:35:92 src 00:50:56:c0:00:05 data 08 00 45 01 00 40 00 01 00 00 40 01 00:00:22:692737: l2-xcrw L2_XCRW: next index 1 tx_fib_index -1 00:00:22:692753: gre4-input GRE: tunnel 0 len 88 src 11.1.1.2 dst 11.1.1.1 00:00:22:692771: error-drop gre4-input: GRE input packets dropped due to missing tunnel Is there any problem in my configuration? Thanks， Xyxue ________________________________
