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路由與下一跳

Argo 將轉發狀態與 Linux 核心分開維護。當 ip 與這些命令顯示的結果不一致時，以這些命令的結果為準進行流量轉發。

rt

Section titled “rt”

vRouter 路由表，依 VRF 區分。

Terminal window
{"command":["rt","--dump","2"]}
Flags: L=Label Valid, P=Proxy ARP, T=Trap ARP, F=Flood ARP, H=Proxy ARP for host interface, V=Preferred VRF
Labels/Misc: S=SiteId N=NetworkId
vRouter inet4 routing table 0/2/unicast
Destination           PPL        Flags        Label         Nexthop  Labels/Misc
                                 Number of routes: 4


0.0.0.0/0               0                       -              0
169.254.254.102/32     32            L        263             13
172.16.12.126/32       32            L          0             46     (S,N):2298:0
172.16.84.126/32       32            L          0             46     (S,N):2298:0

nh

Section titled “nh”

下一跳表。每條路由都指向一個下一跳 id，此表負責解析它們。

Terminal window
{"command":["nh","--list"]}
Id:0          Type:Drop           Fmly: AF_INET  Rid:0  Vrf:0
              Flags:Valid, Tunnel: None


Id:1          Type:Drop           Fmly: AF_INET  Rid:0  Vrf:0
              Flags:Valid, Tunnel: None


Id:2          Type:Receive        Fmly: AF_INET  Rid:0  Vrf:1
              Flags:Valid, Policy, Tunnel: Udp,
              Oif:0


Id:3          Type:Receive        Fmly: AF_INET  Rid:0  Vrf:2
              Flags:Valid, Policy, Tunnel: Udp,
              Oif:0


Id:4          Type:Receive        Fmly: AF_INET  Rid:0  Vrf:3
              Flags:Valid, Policy, Tunnel: Udp,
              Oif:0


Id:5          Type:Receive        Fmly: AF_INET  Rid:0  Vrf:4
              Flags:Valid, Policy, Tunnel: Udp,
              Oif:0


Id:6          Type:Vrf_Translate  Fmly: AF_INET  Rid:0  Vrf:1
              Flags:Valid, Policy, Tunnel: None


Id:7          Type:Vrf_Translate  Fmly: AF_INET  Rid:0  Vrf:2
              Flags:Valid, Policy, Tunnel: None


Id:8          Type:Vrf_Translate  Fmly: AF_INET  Rid:0  Vrf:3
              Flags:Valid, Policy, Tunnel: None


Id:9          Type:Vrf_Translate  Fmly: AF_INET  Rid:0  Vrf:4
              Flags:Valid, Policy, Tunnel: None


Id:10         Type:Vrf_Translate  Fmly: AF_INET  Rid:0  Vrf:5
              Flags:Valid, Policy, Tunnel: None


Id:11         Type:Vrf_Translate  Fmly: AF_INET  Rid:0  Vrf:6
              Flags:Valid, Policy, Tunnel: None


Id:12         Type:Encap          Fmly: AF_INET  Rid:0  Vrf:1
              Flags:Valid, Policy, Tunnel: None
              Oif:2  Len:14
              Encap Data: 02 01 02 03 04 05 00 00 5e 00 01 00 08 00


Id:13         Type:Encap          Fmly: AF_INET  Rid:0  Vrf:2
              Flags:Valid, Policy, Tunnel: None
              Oif:4  Len:14
              Encap Data: 02 01 02 03 04 06 00 00 5e 00 01 00 08 00


Id:14         Type:Encap          Fmly: AF_INET  Rid:0  Vrf:3
              Flags:Valid, Policy, Tunnel: None
              Oif:6  Len:14
              Encap Data: 00 00 5e 00 02 00 00 00 5e 00 01 00 08 00


Id:15         Type:Encap          Fmly: AF_INET  Rid:0  Vrf:6
              Flags:Valid, Policy, Tunnel: None
              Oif:10  Len:14
              Encap Data: 02 01 02 03 04 09 00 00 5e 00 01 00 08 00




... [capture trimmed: first 60 of 3820 lines]

每個條目包含一個 Type 及其所屬的 VRF。這些節點上共出現八種類型， 計數後在所有三個 CE 上的比例完全相同：

Tunnel 558   Encap 27   NAT 22   Vrf 16   Receive 14   Composite 4   Drop 2   Resolve 2

解析至 Drop 下一跳的路由為黑洞路由，當某個前綴出現在 rt 中但流量仍然消失時，這種組合值得重點檢查。

vif

Section titled “vif”

虛擬介面表：資料平面所綁定的介面，以及各介面的計數器。

Terminal window
{"command":["vif","--list"]}
Vrouter Interface Table


Flags: P=Policy, X=Cross Connect, S=Service Chain, Mr=Receive Mirror
       Mt=Transmit Mirror, Tc=Transmit Checksum Offload, L3=Layer 3, L2=Layer 2
       D=DHCP, Vp=Vhost Physical, Pr=Promiscuous, Vnt=Native Vlan Tagged
       Mnp=No MAC Proxy, Dpdk=DPDK PMD Interface, Rfl=Receive Filtering Offload, Mon=Interface is Monitored
       Nf=Dont Fragment, Vof=VLAN insert/strip offload, Mq=MultiQ, L=MAC Learning Enabled
       Proxy=MAC Requests Proxied Always, Fr=Force Recv, Mn=Mirror without Vlan Tag, TTL=TTL not modified
       Mn=Mirror without Vlan Tag, Tun=Tunnel, NoArp=No ARP interface, RawIp=RAW IP interface(No L2 header)
       Npers=Non-Persistent, NoRPF=No RPF Checks, SynC=Syn Cookies, Gro=GRO Enabled
       NoIpfix=IPFIX disabled


evif0/1     Virtual: eth0 (Speed 10000, Duplex 1) Parent:vif0/-1
            Type:Physical HWaddr:60:45:bd:eb:3f:f2  Driver: net_failsafe
            CrossConnectIdx: 2 PartnerIdx: 14
            Vrf:0 Mcast Vrf:0 VN:0x0 Flags:L3L2Vp Ref:7
            MTU: 1500 EncMSS: 0 NH: 0
            RX device packets:386252  bytes:355098338 errors:0
            RX port   packets:386252 errors:0
            RX queue  packets:385977 errors:0
            RX queue errors to lcore 0 0 0 0 0 0 0 0 0 0 0 0 0 0
            RX packets:386252  bytes:355098338 errors:0
            TX packets:274826  bytes:132476854 errors:0
            Drops:0
            TX queue  packets:27 errors:0
            TX port   packets:274826 errors:0
            TX device packets:274826  bytes:132476854 errors:0


evif0/2     Virtual: vhost0 Parent:vif0/-1
            Type:Host HWaddr:60:45:bd:eb:3f:f2  Driver: vr_dpdk_tap
            CrossConnectIdx: 1 PartnerIdx: 15
            Vrf:0 Mcast Vrf:0 VN:0x0 Flags:L3L2 Ref:6
            MTU: 1500 EncMSS: 0 NH: 0
            RX device packets:263582  bytes:122772389 errors:0
            RX queue  packets:263582 errors:0
            RX queue errors to lcore 0 0 0 0 0 0 0 0 0 0 0 0 0 0
            RX packets:263582  bytes:120136569 errors:0
            TX packets:374276  bytes:343331787 errors:0
            Drops:0
            TX queue  packets:370829 errors:3447
            TX device packets:370820  bytes:341968151 errors:9


vif0/2      Ethernet: vethfrr0 Parent:vif0/-1
            Type:Virtual HWaddr:0:0:5e:0:1:0  Driver: net_af_packet
            Vrf:1 Mcast Vrf:1 VN:0x0 Flags:PL3Proxy Ref:10
            MTU: 1500 EncMSS: 130 NH: 12
            RX port   packets:4919 errors:0
            RX queue  packets:4917 errors:0
            RX queue errors to lcore 0 0 0 0 0 0 0 0 0 0 0 0 0 0
            RX packets:907  bytes:153742 errors:0
            TX packets:6  bytes:444 errors:0
            Drops:905
            TX queue  packets:346 errors:0
            TX port   packets:3987 errors:0
            Ingress ACL: 65 67
            Egress ACL: 65 67
            Service ACL: 65 67


vif0/4      Ethernet: vethbfd0 Parent:vif0/-1
            Type:Virtual HWaddr:0:0:5e:0:1:0  Driver: net_af_packet


... [capture trimmed: first 60 of 378 lines]

頂部的旗標說明值得閱讀一次——Vp 標記 vhost 實體介面，Dpdk 標記由 DPDK 管理的介面。使用此表可確認資料平面已接管您預期的介面，並查看 Linux 不會顯示的 RX 與 TX 計數器（因為流量從未到達核心）。

mpls

Section titled “mpls”
Terminal window
execcli mpls --help

Argo MPLS 表。僅可從機器本端存取——mpls 不在除錯 API 上，因此與上述 rt、nh 及 vif 不同，需要透過 SSH 或 序列主控台，並使用 execcli 執行。

此處未提供擷取輸出。在此部署中，CE 使用 BGP 與 ECMP 轉發 IPv4，不使用 MPLS 標籤，因此擷取結果只會顯示空表，無法提供任何參考價值。其存在性及 --help 參數形式已從設備自身的補全選單中驗證；其填入後的輸出內容在此不予重現。