在Nexus 9000上配置选择性队列并对其进行故障排除

简介

本文档介绍如何在Nexus 9300 (EX-FX-GX)模型中配置和排除选择性Q-in-Q故障。 

先决条件

要求

Cisco 建议您了解以下主题：

• Q-in-Q封装
• Dot1q交换
• Nexus 9000

使用的组件

本文档中的信息基于以下软件和硬件版本：

• 硬件：N9K-C9336C-FX2
• 版本：10.2(3)

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。

背景信息

Q-in-Q VLAN隧道使服务提供商能够隔离其基础设施中不同用户的流量，同时通过向已标记的帧添加第二个802.1Q标记，仍然为您提供完整的VLAN供内部使用。

具有多个提供商VLAN的选择性队列是隧道功能，它允许端口上用户特定范围的VLAN与一个特定提供商VLAN相关联。

Q-in-Q允许在一个端口上具有多个用户VLAN到提供商VLAN的映射。

使用服务提供商VLAN的属性，传入的VLAN标记与端口上配置的任何用户VLAN匹配的数据包将通过交换矩阵进行隧道传输。封装的数据包将用户VLAN标记作为内部数据包的第2层报头的一部分。

网络图

配置

配置选择性Q-in-Q的目的是在接口eth1/1上映射N9KFX2和N9KFX2-1中接收的流量中的VLAN。

Nexus封装流量并将其与DOT1Q报头VLAN 20一起发送到提供商，由Nexus 93180FX模拟。

主机A

interface Ethernet1/1
  switchport
  switchport mode trunk
  no shutdown

interface Vlan10
  no shutdown
  ip address 192.168.1.1/24

主机B

interface Ethernet1/1
  switchport
  switchport mode trunk
  no shutdown

interface Vlan10
  no shutdown
  ip address 192.168.1.2/24

N9KFX2

interface Ethernet1/1
  switchport
  switchport mode trunk
  switchport vlan mapping all dot1q-tunnel 20
  switchport trunk allowed vlan 20
  spanning-tree port type edge trunk
  spanning-tree bpdufilter enable
  no shutdown

interface Ethernet1/35
  switchport
  switchport mode trunk
  no shutdown

N93180FX

system dot1q-tunnel transit 

interface Ethernet1/17
  switchport
  switchport mode trunk
  no shutdown

interface Ethernet1/18
  switchport
  switchport mode trunk
  no shutdown

N9KFX2-1

interface Ethernet1/1
  switchport
  switchport mode trunk
  switchport vlan mapping all dot1q-tunnel 20
  switchport trunk allowed vlan 20
  spanning-tree port type edge trunk
  spanning-tree bpdufilter enable
  no shutdown

interface Ethernet1/35
  switchport
  switchport mode trunk
  no shutdown

故障排除

Q-in-Q编程通过组件从控制平面移动到硬件：

：

一致性检查器

Nexus交换机的最新版本具有一致性检查器，可用于防止编程错误。

N9KFX2# show consistency-checker selective-qinq

Box level hardware programming checks      : PASS
Fetching ingressVlanXlate entries from slice: 0 HW
Fetching ingressVlanXlate entries from slice: 1 HW
Fetching ingressVlanXlate TCAM entries
Performing port specific checks for intf Eth1/1
Port specific selective QinQ checks for interface  Eth1/1 : PASS
Selective QinQ Overall status      : PASS

控制层面

确认端口上的VLAN是否处于活动状态。

N9KFX2#sh vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Eth1/1
20   VLAN0020                         active    Eth1/1, Eth1/35

确认已清楚地看到VLAN映射。

N9KFX2# sh vlan internal info mapping

Per Port Vlan Translation Details

================
Entry No                :  0
----------------------
  ifindex Eth1/1(0x1a000000)
  vlan mapping enabled: TRUE
  vlan translation mapping information (count=1):
    Original Vlan      Translated Vlan
    -------------      ---------------
    all                  20

Entry No                :  1
----------------------
  ifindex Eth1/35(0x1a004400)
  vlan mapping enabled: FALSE
  vlan translation mapping information (count=0):
    Original Vlan      Translated Vlan
    -------------      ---------------

ELTM

确认是否有任何错误增加或非零。

N9KFX2# show system internal eltm error count
interface config error: 0
dce error: 0
port struct error: 0
port channel error: 0
tunnel error: 0
tlv count error: 0
vpn count error: 0
SI add to DB error: 0

运行attach module X命令。X是分配物理接口的模块。

N9KFX2# attach module 1
module-1# show system internal eltm info vlan 20
IFTMC Detailed info for VLAN = 20
cr_flags = VLAN , bd = 21(0x15)  stg-id = 0 type = 1 stp:0
shut_state = 2 , oper_state = 1
vni = 0, ipmc_idx = 0x0 ipmc_remap_idx = 0x0 ipmc_remap_idx2 = 0x0 dvif: 0
ipmc_mrouter_idx = 0x0 ipmc_mrouter_remap_idx = 0x0 ipmc_mrouter_remap_idx2 = 0x0
pbp_idx=0
eid[0] = 0, alt_eid[0] = 0eid[1] = 0, alt_eid[1] = 0eid[2] = 0, alt_eid[2] = 0eid[3] = 0, alt_eid[3] = 0eid[4] = 0, alt_eid[4] = 0eid[5] = 0, alt_eid[5] = 0eid[6] = 0, alt_eid[6] = 0eid[7] = 0, alt_eid[7] = 0


Active ports:                                             <<<<< Confirm Active ports are listed for the vlan
  Ethernet1/1(0x1a000000)  Ethernet1/35(0x1a004400)

Active Local ports:
  Ethernet1/1(0x1a000000)  Ethernet1/35(0x1a004400)

Ports using this VLAN as Provider:                          <<<<< Displays the interface that is doing the tunneling
  Ethernet1/1(0x1a000000)

SDB Active ports:
      Ethernet1/1

pbp_idx:0

VLAN Features:
  prim_vlan      : 0, prim_intf_vlan  : 0, vlan mode      : 0(CE)
  pt_cam_en      : 1, ipv4_igmp_snoop  : 1, ipv4_pim_snoop  : 0
  ipv6_mld_snoop : 0, ipv6_pim_snoop  : 0, l2l3_lkup_cfg  : 1
  v4_table_id    : 1        (0x00000001), v4_vpn_id        : 1 (0x1)
  v6_table_id    : 2147483649 (0x80000001), v6_vpn_id      : 1 (0x1)
  age_tmr_sel    : 1, sm_en  : 0 fcf  : 0 omf : 1, dhcp_snoop_en  : 0
  proxy_learn    : 0, iic_en : 0, use_oxid : 0, age_grp_sel        : 0
  disable_learn  : 0, otv_en : 0, global  : FALSE
  bc_uc_ftag    : 4095  , mcast_ftag_num : 1, arp_sup: 0x0 ,icmpv6 nd local proxy: 0x0
  isdot1qvlan    : 0  , num_dot1q_ports: 0  num_sel_dot1q_qinvni_ports: 0
  num_multi_tag_ports: 0,  eid: 0,  xconnect: 0,  mcast_ftag[1]  : {4095}
  is_transit    : 0    mdns_en: 0,

TAH:VLAN_CONTROL:
------------------
vrf: 0 forwarding_vlan: 0 forwarding mode: 0
Flags: 0x0
up: 0 vni: 0 is_sr_evpn: 0

您可以检查接口编程。输出显示有关端口编程的信息。

N9KFX2# attach module 1
module-1# show system internal eltm info interface e1/1
IFTMC Detailed info for Interface Ethernet1/1(0x1a000000)
CR_flags = INTF LIF  (0x3),  LTL = 6144 (0x1800), (S 0x0, P 0x0)
IF_INDEX = Ethernet1/1(0x1a000000), LIF = 4100 (0x1004), SDB LIF = 4100 (0x1004)

State = UP
Layer = L2, Mode = TRUNK, native_vlan = 1 tag_native_vlan = 0   <<< Confirm mode and Layer
AdminMode = 0x100000 is_monitor = 0 src_if_pruning 1
Operational VLAN's (2):                                         <<< Confirm if the VLAN for tunnel and native are correct
  1,20
voice vlan = 4096
MVR Configured VLAN's (0):

local_port = 1, ldb_sharing = 1, ilm_sharing = 0x1
ldb_port_flags = 0x0, dsm = 0, dnl = 0
pc_ifindx = 0x0, fpc = 0x0
Interface Features:
  ipv4_en        : 0, ipv4_mcast_en : 0, df_mask : 0, mpls_en : 0
  ipv6_en        : 0, ipv6_mcast_en : 0  pim_dr_en :0 ipsg_en  : 0
  FC port mode:0 vsan: 0 trunk mode: 0 speed: 0
  FCF Enabled : 0 FCF MAC:0000:0000:0000
  PTP fid = 0
  mpls_strip_en    :0
external port :0
Operational VSAN's (0):

  v4_table_id    : 1          (0x00000001), v4_vpn_id    : 1 (0x1)
  v6_table_id    : 2147483649 (0x80000001), v6_vpn_id    : 1 (0x1)
  per_pkt_ls_en  : 0,  bd              : N/A (0x0)
  icmp_redirect  : 1, ipv6_redirect    : 1
  v4_same_if_chk : 0, v6_same_if_check : 0
  mtu_index      : 1    (0x0001), new_mtu_index  : 1    (0x0001)
  mtu            : 1500 (0x05dc), port_trust    : 0 
  v4_rpf_mode    : 0  , v6_rpf_mode            : 0
  v4_rpf_mode (sdb) : 0  , v6_rpf_mode (sdb) : 0 
  intf_type      : 0x0, intf_flags  : 0x20
  sub_flags      : 0x0, port_type  : 0x0, is_aida  : 0x0, vpc_dvp_no  : 0x0
  fcoe_mac_ip_chk: 0 buffer_boost: 0 openflow_en: 0 span_buffer_cfg: 0 span_mode: 0 outer_bd = 512
  interface mac: 00:00:00:00:00:00 old_mac: 00:00:00:00:00:00 mac_index:0
  Src-Idx:1
  mc_index : 4100, egress_vsl_drop: 0, pv_en : 0, is_selective_qinvni_port 1 ether_type 0x8100 vlan_bmp_State_change : False, policy flood_l2_local 1.  <<<Confirm the ether type is 8100 and is_selective_qinvni_port is 1
  is_multi_tag_port 0, nat_realm_id 0
global_id 0
  enm_if_type  : 0
  pbp_idx  : 0
  pinned_ifindex : 0x0
normal_vlan_bmp (0):

arp_suppress inst[0] 0 arp_suppress inst[1] 0 arp_suppress inst[2] 0 arp_suppress inst[3] 0 arp_suppress inst[4] 0 arp_suppress inst[5] 0 arp_suppress inst[6] 0 arp_suppress inst[7] 0 icmpv6 nd local proxy en inst[0] 0 icmpv6 nd local proxy en inst[1] 0 icmpv6 nd local proxy en inst[2] 0 icmpv6 nd local proxy en inst[3] 0 icmpv6 nd local proxy en inst[4] 0 icmpv6 nd local proxy en inst[5] 0 icmpv6 nd local proxy en inst[6] 0 icmpv6 nd local proxy en inst[7] 0 mdns_en inst[0] 0 mdns_en inst[1] 0 mdns_en ins
t[2] 0 mdns_en inst[3] 0 mdns_en inst[4] 0 mdns_en inst[5] 0 mdns_en inst[6] 0 mdns_en inst[7] 0 arp_suppress inst[0] 0 arp_suppress inst[1] 0 arp_suppress inst[2] 0 arp_suppress inst[3] 0 arp_suppress inst[4] 0 arp_suppress inst[5] 0 arp_suppress inst[6] 0 arp_suppress inst[7] 0 icmpv6 nd local proxy en inst[0] 0 icmpv6 nd local proxy en inst[1] 0 icmpv6 nd local proxy en inst[2] 0 icmpv6 nd local proxy en inst[3] 0 icmpv6 nd local proxy en inst[4] 0 icmpv6 nd local proxy en inst[5] 0 icmpv6 nd local prox
y en inst[6] 0 icmpv6 nd local proxy en inst[7] 0 mdns_en inst[0] 0 mdns_en inst[1] 0 mdns_en inst[2] 0 mdns_en inst[3] 0 mdns_en inst[4] 0 mdns_en inst[5] 0 mdns_en inst[6] 0 mdns_en inst[7] 
service provider Vlans 0

vlan_xlt_tlb_en_ingress : 1  num_vlan_xlt_ingr : 1

  Vlan Translation Table (INGRESS)         <<< This table displays xlt the vlan used to send to the provider
  --------------------------------
    in_vlan  xlt_vlan
        1      20


SDB INFO:
--------------------------------
MVR VLAN's (0):

STATE = UP, is_mcec = 0, is_mct = 0
TAH:L2 INFO: 4100
----------
Flags : 0x41
NIV Index: 1 Source Chip: 1 Source Port: 72
slice: 1 slice_port: 0
is_monitor: 0 lif: 4100 phy_intf_id: 1 vnic_if: 0 learn_en: 1 native_vlan 1
trunk_port: 1 src_if_check: 1
FC info: intf_type = 0x0 port_mode = 0x0 port_vsan = 0 port_speed = 0 fcf_mac = 0:0:0:0:0:0

IFTMC

对于IFTMC，您可以运行2条命令。在运行以下命令之前，请运行attach module 1命令。

N9KFX2# attach module 1
module-1# show system internal iftmc info interface e1/1
module-1# show system internal iftmc info vlan 20

两个命令

• show system internal iftmc info interface ethernet1/1
• show system internal iftmc info vlan 20

显示与ELTM输出类似的信息，确保您在ELTM和IFTMC模块之间具有相同的值。

Hardware

要确认输出已在硬件上正确编程，您可以运行show hardware internal tah interface ethernet 1/1命令。在该命令的输出中，您可以转到BdStateTable部分。

N9KFX2-1(config-if)# show hardware internal tah interface ethernet 1/1 
BdStateTable:
ENTRY: 1
        info_leaf_flood_dst_ptr : 1                 <<<Displays native vlan      
        info_leaf_igmp_mld_dst_ptr : 4098
        info_leaf_fid : 1                           <<<Displays native vlan
        info_leaf_vrf : 1
        info_leaf_igmp_snp_en : 1
        info_leaf_l3_bind_check_en : 1
        info_leaf_v4_omf : 1
        info_leaf_unknown_uc_flood : 1
        info_leaf_unknown_mc_flood : 1
        info_leaf_ecn_mark_en : 1
        info_leaf_l2_bind_check_en : 1
        info_leaf_bd_profile_idx : 1
        info_leaf_analytics_en : 1
        info_leaf_flow_collect_en : 1
        info_spine_info0_gipo_idx : 1              <<<Displays native vlan
        info_spine_info0_scope : 64
        info_spine_info0_spare : 0x00000000:0x00100044
        info_spine_info1_spare : 0x00001000:0x00000000
        info_spine_info2_gipo_idx : 512
        info_spine_info2_scope : 12416
        info_spine_info2_spare : 0x00005000:0x10000000
        info_spine_info3_gipo_idx : 384
        info_spine_info3_spare : 0x00000000:0x00000000
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