Hi Nikhil Share me all CLI commands which you have triggered to vpp. I am sure you forgot to set your interface to your IP table.
*"set interface ip table <nikhil_interfce> <nikhil_talble>"* Use this and enjoy the weekend *//MJ* *Regards*, Mrityunjay Kumar. Mobile: +91 - 9731528504 On Thu, Mar 11, 2021 at 11:43 PM nikhil subhedar <subhedarnik...@gmail.com> wrote: > Hi All, > > Today i found a strange thing on my POD on which VPP is running. Can > anyone please shed some light on this? > Thanks. > *Config:* > > 1) I created a loopback interface on VPP using confd CLI. on fib-index 1 > *loop2 (up):* > > * L3 50.50.50.50/32 <http://50.50.50.50/32> ip4 table-id 1 fib-idx 1*Also > , on the top of this i am having physical/ connected interface. > > > > > > *VirtualFuncEthernet0/6/0.900 (up): L3 20.20.146.226/24 > <http://20.20.146.226/24> ip4 table-id 1 fib-idx 12) *On ubuntu VM i have > created a loopback, > > > > > > > > > > > > > > > > > > > > *lo:mobile: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet > 60.60.60.60 netmask 255.255.255.255 loop txqueuelen 1000 (Local > Loopback)And i have a connected interface ens5.900: > flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet > 20.20.146.216 route on VM.root@vmsrvrlnx-strongswan-216:~# route -nKernel > IP routing tableDestination Gateway Genmask Flags > Metric Ref Use Iface0.0.0.0 10.163.64.1 0.0.0.0 > UG 0 0 0 ens32.1.75.0 0.0.0.0 255.255.255.252 > U 0 0 0 gre110.163.64.0 0.0.0.0 255.255.224.0 > U 0 0 0 ens320.20.146.0 0.0.0.0 255.255.255.0 > U 0 0 0 ens5.90050.50.50.50 20.20.146.226 > 255.255.255.255 UGH 0 0 0 ens5.900* > 3) I am trying to ping from VM to vpp. > using command > > * ping 50.50.50.50 -I ens5.900.*4) This icmp packet is reached to VPP > on fib index 1, but when VPP is trying to send the echo-reply it is using > fib index 0 and because of this icmp reply packet > is not reaching to my VM. > Below is o/p of show trace command. > > Packet 1 > > 03:50:52:603829: dpdk-input > VirtualFuncEthernet0/6/0 rx queue 0 > buffer 0x4c2f16: current data 0, length 102, buffer-pool 0, ref-count 1, > totlen-nifb 0, trace handle 0x1000000 > ext-hdr-valid > l4-cksum-computed l4-cksum-correct > PKT MBUF: port 0, nb_segs 1, pkt_len 102 > buf_len 2176, data_len 102, ol_flags 0x180, data_off 128, phys_addr > 0x7b0bc600 > packet_type 0x591 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0 > rss 0x0 fdir.hi 0x0 fdir.lo 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 > Packet Types > RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet > RTE_PTYPE_L3_IPV4_EXT_UNKNOWN (0x0090) IPv4 packet with or without > extension headers > RTE_PTYPE_L4_ICMP (0x0500) ICMP packet > IP4: fa:16:3e:08:4c:1d -> fa:16:3e:78:ca:96 802.1q vlan 900 > ICMP: 20.20.146.216 -> 50.50.50.50 > tos 0x00, ttl 64, length 84, checksum 0x3d88 dscp CS0 ecn NON_ECN > fragment id 0xf1d0, flags DONT_FRAGMENT > ICMP echo_request checksum 0x4303 > 03:50:52:603840: ethernet-input > frame: flags 0x3, hw-if-index 3, sw-if-index 3 > IP4: fa:16:3e:08:4c:1d -> fa:16:3e:78:ca:96 802.1q vlan 900 > 03:50:52:603847: ip4-input > ICMP: 20.20.146.216 -> 50.50.50.50 > tos 0x00, ttl 64, length 84, checksum 0x3d88 dscp CS0 ecn NON_ECN > fragment id 0xf1d0, flags DONT_FRAGMENT > ICMP echo_request checksum 0x4303 > 03:50:52:603853: ip4-lookup > *fib* 1 dpo-idx 22 flow hash: 0x00000000 > ICMP: 20.20.146.216 -> 50.50.50.50 > tos 0x00, ttl 64, length 84, checksum 0x3d88 dscp CS0 ecn NON_ECN > fragment id 0xf1d0, flags DONT_FRAGMENT > ICMP echo_request checksum 0x4303 > 03:50:52:603857: ip4-local > ICMP: 20.20.146.216 -> 50.50.50.50 > tos 0x00, ttl 64, length 84, checksum 0x3d88 dscp CS0 ecn NON_ECN > > > > ICMP echo_request checksum 0x4303 > 03:50:52:603859: ip4-icmp-input > ICMP: 20.20.146.216 -> 50.50.50.50 > tos 0x00, ttl 64, length 84, checksum 0x3d88 dscp CS0 ecn NON_ECN > fragment id 0xf1d0, flags DONT_FRAGMENT > ICMP echo_request checksum 0x4303 > 03:50:52:603860: ip4-icmp-echo-request > ICMP: 20.20.146.216 -> 50.50.50.50 > tos 0x00, ttl 64, length 84, checksum 0x3d88 dscp CS0 ecn NON_ECN > fragment id 0xf1d0, flags DONT_FRAGMENT > ICMP echo_request checksum 0x4303 > 03:50:52:603863: ip4-load-balance > *fib* 0 dpo-idx 9 flow hash: 0x00000000 > ICMP: 50.50.50.50 -> 20.20.146.216 > tos 0x00, ttl 64, length 84, checksum 0x246c dscp CS0 ecn NON_ECN > fragment id 0x0aed, flags DONT_FRAGMENT > ICMP echo_reply checksum 0x4b03 > 03:50:52:603865: ip4-rewrite > tx_sw_if_index 11 dpo-idx 9 : ipv4 via 20.20.146.216 > VirtualFuncEthernet0/6/0.900: mtu:9000 next:9 > fa163e084c1dfa163e78ca96810003840800 flow hash: 0x000000 > 00 > 00000000: > fa163e084c1dfa163e78ca96810003840800450000540aed40004001246c3232 > 00000020: 3232141492d800004b03000a0001795c4a60000000002a6208000000 > 03:50:52:603867: VirtualFuncEthernet0/6/0-output > VirtualFuncEthernet0/6/0.900 > IP4: fa:16:3e:78:ca:96 -> fa:16:3e:08:4c:1d 802.1q vlan 900 > ICMP: 50.50.50.50 -> 20.20.146.216 > tos 0x00, ttl 64, length 84, checksum 0x246c dscp CS0 ecn NON_ECN > fragment id 0x0aed, flags DONT_FRAGMENT > ICMP echo_reply checksum 0x4b03 > > *Below is o/p of show ip fib index 1 command* > > > 20.20.146.216/32 > unicast-ip4-chain > [@0]: dpo-load-balance: [proto:ip4 index:55 buckets:1 uRPF:71 to:[0:0] > via:[7953:668052]] > [0] [@5]: ipv4 via 20.20.146.216 VirtualFuncEthernet0/6/0.900: > mtu:9000 next:9 fa163e084c1dfa163e78ca96810003840800 > 20.20.146.0/24 > unicast-ip4-chain > [@0]: dpo-load-balance: [proto:ip4 index:50 buckets:1 uRPF:67 to:[0:0]] > [0] [@4]: ipv4-glean: VirtualFuncEthernet0/6/0.900: mtu:9000 next:3 > fffffffffffffa163e78ca96810003840806 > 20.20.146.226/32 > unicast-ip4-chain > [@0]: dpo-load-balance: [proto:ip4 index:53 buckets:1 uRPF:72 to:[4:336]] > [0] [@2]: dpo-receive: 20.20.146.226 on VirtualFuncEthernet0/6/0.900 > 20.20.146.255/32 > unicast-ip4-chain > [@0]: dpo-load-balance: [proto:ip4 index:52 buckets:1 uRPF:70 to:[0:0]] > [0] [@0]: dpo-drop ip4 > 50.50.50.50/32 > unicast-ip4-chain > [@0]: dpo-load-balance: [proto:ip4 index:56 buckets:1 uRPF:75 > to:[7953:668036]] > [0] [@2]: dpo-receive: 50.50.50.50 on loop2 > 60.60.60.60/32 > unicast-ip4-chain > [@0]: dpo-load-balance: [proto:ip4 index:54 buckets:1 uRPF:74 to:[5:480]] > [0] [@5]: ipv4 via 20.20.146.216 VirtualFuncEthernet0/6/0.900: > mtu:9000 next:9 fa163e084c1dfa163e78ca96810003840800 > > >
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