Hi Alfa, Why do you want to push VLAN tag 10 into the BD? This won't work with BVI, as I explained before, which is a main interface and therefore cannot send packet into the BD with VLAN tag 10. So when the ARP response come back from BVI to output on GigabitEthernetd/0/0 with sw_if_index1, it is dropped by tag-rewrite configured on that interface which expect the ARP response packet with VLAN 10 to pop before output.
If you remove the tag-rewrite operation on GigabitEthernetd/0/0, this would work fine. Regards, John From: Alfa [mailto:76278...@qq.com] Sent: Saturday, January 21, 2017 7:10 AM To: John Lo (loj) <l...@cisco.com>; vpp-dev <vpp-dev@lists.fd.io> Subject: Re: RE: [vpp-dev] How to setup BVI with a ip address? Hi John, I want to add access bvi like the example you given, but it doesn't work, the config looks like following: set interface l2 bridge GigabitEthernetd/0/0 10 set interface l2 tag-rewrite GigabitEthernetd/0/0 push dot1q 10 set interface state GigabitEthernetd/0/0 up loop create set int l2 bridge loop0 10 bvi set int ip address loop0 192.168.10.1/24 set int state loop0 up trace dpdk-input, we can get following log. when packet passed the link layer packet header is wrong. 00:00:49:249362: dpdk-input GigabitEthernetd/0/0 rx queue 0 buffer 0x4bba: current data 0, length 60, free-list 0, totlen-nifb 0, trace 0x0 PKT MBUF: port 0, nb_segs 1, pkt_len 60 buf_len 2176, data_len 60, ol_flags 0x180, data_off 128, phys_addr 0x75d2ad80 packet_type 0x0 Packet Offload Flags PKT_RX_IP_CKSUM_GOOD (0x0080) IP cksum of RX pkt. is valid PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid ARP: a0:36:9f:55:6e:88 -> ff:ff:ff:ff:ff:ff request, type ethernet/IP4, address size 6/4 a0:36:9f:55:6e:88/192.168.10.100 -> 00:00:00:00:00:00/192.168.10.1 00:00:49:249375: ethernet-input ARP: a0:36:9f:55:6e:88 -> ff:ff:ff:ff:ff:ff 00:00:49:249383: l2-input l2-input: sw_if_index 1 dst ff:ff:ff:ff:ff:ff src a0:36:9f:55:6e:88 00:00:49:249386: l2-input-vtr l2-input-vtr: sw_if_index 1 dst ff:ff:ff:ff:ff:ff src a0:36:9f:55:6e:88 data 81 00 00 0a 08 06 00 01 08 00 06 04 00:00:49:249389: l2-learn l2-learn: sw_if_index 1 dst ff:ff:ff:ff:ff:ff src a0:36:9f:55:6e:88 bd_index 1 00:00:49:249392: l2-flood l2-flood: sw_if_index 1 dst 00:01:08:00:06:04 src 00:01:a0:36:9f:55 bd_index 1 00:00:49:249396: arp-input request, type ethernet/IP4, address size 6/4 a0:36:9f:55:6e:88/192.168.10.100 -> 00:00:00:00:00:00/192.168.10.1 00:00:49:249406: loop0-output loop0 ARP: 00:00:81:00:00:0a -> 6e:88:de:ad:00:00 reply, type ethernet/IP4, address size 6/4 de:ad:00:00:00:00/192.168.10.1 -> a0:36:9f:55:6e:88/192.168.10.100 00:00:49:249414: l2-input l2-input: sw_if_index 5 dst 6e:88:de:ad:00:00 src 00:00:81:00:00:0a 00:00:49:249416: l2-fwd l2-fwd: sw_if_index 5 dst 6e:88:de:ad:00:00 src 00:00:81:00:00:0a bd_index 1 00:00:49:249418: l2-flood l2-flood: sw_if_index 5 dst 6e:88:de:ad:00:00 src 00:00:81:00:00:0a bd_index 1 00:00:49:249420: l2-output l2-output: sw_if_index 1 dst 6e:88:de:ad:00:00 src 00:00:81:00:00:0a 00:00:49:249422: error-drop l2-output: L2 output tag rewrite drops Am I using the wrong configuration lead to this result? ------------------ Original ------------------ From: "John Lo (loj)";<l...@cisco.com<mailto:l...@cisco.com>>; Date: Fri, Jan 20, 2017 07:14 AM To: "Alfa"<76278...@qq.com<mailto:76278...@qq.com>>; "vpp-dev"<vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>>; Subject: RE: [vpp-dev] How to setup BVI with a ip address? The config for VPP will be something like the following. Let's start with some of your existing config (also excluding some others): create sub GigabitEthernetd/0/0 100 create sub GigabitEthernetd/0/1 100 create sub GigabitEthernetd/0/0 200 create sub GigabitEthernetd/0/1 200 set int state GigabitEthernetd/0/0 up set int state GigabitEthernetd/0/1 up set int state GigabitEthernetd/0/0.100 up set int state GigabitEthernetd/0/0.200 up set int state GigabitEthernetd/0/1.100 up set int state GigabitEthernetd/0/1.200 up set interface l2 bridge GigabitEthernetd/0/0.100 100 set interface l2 bridge GigabitEthernetd/0/1.100 100 set interface l2 bridge GigabitEthernetd/0/0.200 200 set interface l2 bridge GigabitEthernetd/0/1.200 200 Now we have two BDs 100 and 200 each with two VLAN sub-interfaces. We need to pop the VLAN tag as packets are received into the BD: set int l2 tag-rewrite GigabitEthernetd/0/0.100 pop set int l2 tag-rewrite GigabitEthernetd/0/0.200 pop set int l2 tag-rewrite GigabitEthernetd/0/1.100 pop set int l2 tag-rewrite GigabitEthernetd/0/1.200 pop We add BVIs to each BD: loop create set int l2 bridge loop0 100 bvi set int state loop0 up set int ip address loop0 192.168.100.1/24 loop create set int l2 bridge loop1 200 bvi set int state loop1 up set int ip address loop1 192.168.200.1/24 Now BVIs loop1 and loop2 can be utilized to route packets between BD 100 and BD 200. The reason we need to pop VLAN tags into BD is that BVI interface is main and not VLAN sub-interfaces so cannot send packets into BD with VLAN tags. HTH with regards, John From: vpp-dev-boun...@lists.fd.io<mailto:vpp-dev-boun...@lists.fd.io> [mailto:vpp-dev-boun...@lists.fd.io] On Behalf Of Alfa Sent: Thursday, January 19, 2017 9:18 AM To: vpp-dev <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Subject: [vpp-dev] How to setup BVI with a ip address? Hi, guys, I want to set up topology like following: ----p4p1.100 ---- pc1 192.168.100.100/24, gw 192.168.100.1 | br100---- | ----p4p2.100 ---- pc2 192.168.100.200/24, gw 192.168.100.1 ----p4p1.200 ---- pc3 192.168.200.100/24, gw 192.168.200.1 | br200---- | ----p4p2.200 ---- pc4 192.168.200.200, gw 192.168.200.1 in linux, we can got the desired topology using following cmd: vconfig add p4p1 100 vconfig add p4p2 100 brctl add br br100 brctl addif br100 p4p1.100 brctl addif br100 p4p2.100 ifconfig br100 192.168.100.1 vconfig add p4p1 200 vconfig add p4p2 200 brctl add br br200 brctl addif br200 p4p1.200 brctl addif br200 p4p2.200 ifconfig br200 192.168.200.1 sysctl -w net.ipv4.ip_forward=1 finally, we can ping from any pc to other pc. I want to get the same topology like above, so I add following cmd in vpp, which config g/0/0 and g/0/1 to a trunk port with native vlan 1 and allowed vlan 100, 200. How can I config svi(Switch Virtual Interface) of vlan 100 and vlan 200 in vpp? Could you plz give some reference to study? Thank you in advance! create sub GigabitEthernetd/0/0 100 create sub GigabitEthernetd/0/1 100 create sub GigabitEthernetd/0/0 200 create sub GigabitEthernetd/0/1 200 set int state GigabitEthernetd/0/0 up set int state GigabitEthernetd/0/1 up set int state GigabitEthernetd/0/0.100 up set int state GigabitEthernetd/0/0.200 up set int state GigabitEthernetd/0/1.100 up set int state GigabitEthernetd/0/1.200 up # GigabitEthernetd/0/0 native vlan 1, allowed vlan 100, 200 # GigabitEthernetd/0/1 native vlan 1, allowed vlan 100, 200 set interface l2 bridge GigabitEthernetd/0/0 1 set interface l2 tag-rewrite GigabitEthernetd/0/0 push dot1q 1 set interface l2 bridge GigabitEthernetd/0/1 1 set interface l2 tag-rewrite GigabitEthernetd/0/1 push dot1q 1 set interface l2 bridge GigabitEthernetd/0/0.100 100 set interface l2 bridge GigabitEthernetd/0/1.100 100 set interface l2 bridge GigabitEthernetd/0/0.200 200 set interface l2 bridge GigabitEthernetd/0/1.200 200
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