在Nexus 7K上配置VXLAN泛洪和学习

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已更新: 2016 年 10 月 10 日

文档 ID:200269

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简介

本文档介绍Nexus 7000系列交换机上虚拟可扩展局域网(VXLAN)泛洪和学习的配置。

先决条件

要求

Cisco 建议您了解以下主题：

组播路由概念，例如交汇点 (RP) 和平台无关组播 (PIM)。
VXLAN概念

注意：本文档假设，在配置 VXLAN 前已建立 IP 路由和组播路由。

使用的组件

本文档中的信息基于以下软件和硬件版本：

N77-C7710
N77-F348XP-23
N77-F324FQ-25

注意：N77K运行软件版本7.2(0)D1(1)。

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。如果您使用的是真实网络，请确保您已经了解所有命令的潜在影响。

配置

网络图

配置

这些配置是 VXLAN 配置部分的特定配置。这些配置假设，通过您选择的路由协议，可以完全访问拓扑中的所有第 3 层接口。本示例中使用静态路由。它还假设已在这些相同的L3接口上建立组播路由

VTEP-1

feature pim
system bridge-domain 50,75
feature nv overlay
feature interface-vlan

feature vni
vni 5000
vni 7500

ip route 10.10.10.2/32 Ethernet10/1 192.168.1.2
ip pim rp-address 192.168.1.1 group-list 224.0.0.0/4

bridge-domain 50
bridge-domain 75

encapsulation profile vni VSI_50_TO_5000
  dot1q 50  vni 5000
encapsulation profile vni VSI_75_TO_7500
    dot1q 75  vni 7500
bridge-domain 50
  member vni 5000
bridge-domain 75
  member vni 7500

interface nve1
  no shutdown
  source-interface loopback10
  member vni 5000 mcast-group 225.1.1.1
  member vni 7500 mcast-group 227.1.1.1

interface Bdi50
   no shutdown
   ip address 10.50.50.50/24

interface Bdi75
   no shutdown
   ip address 10.75.75.75/24

interface Ethernet7/17
  no switchport
  no shutdown
  service instance 1 vni
    no shutdown
    encapsulation profile VSI_50_TO_5000  default
  service instance 2 vni
    no shutdown
    encapsulation profile VSI_75_TO_7500 default

interface Ethernet10/1
  no switchport
  ip address 192.168.1.1/30
  ip pim sparse-mode
  no shutdown

interface loopback10
  ip address 10.10.10.1/32
  ip pim sparse-mode

请注意，VTEP（Vxlan隧道终端）上的内部接口配置为第3层端口（无交换机端口）。但是，没有为其分配IP。另外，必须注意，在VTEP上定义的BD值不必与用于向此设备发送流量的vlan ID匹配。但是，封装配置文件中定义的dot1q到VNI（Vxlan网络标识符）映射（在内部接口上的服务实例下调用）应与Vlan ID匹配。

VTEP-2

feature pim
system bridge-domain 50,75
feature nv overlay
feature interface-vlan

feature vni
vni 5000
vni 7500

ip route 10.10.10.1/32 Ethernet10/7 192.168.1.1
ip pim rp-address 192.168.1.1 group-list 224.0.0.0/4

bridge-domain 50
bridge-domain 75

encapsulation profile vni VSI_50_TO_5000
  dot1q 50  vni 5000
encapsulation profile vni VSI_75_TO_7500
    dot1q 75  vni 7500
bridge-domain 50
  member vni 5000
bridge-domain 75
  member vni 7500

interface nve1
  no shutdown
  source-interface loopback10
  member vni 5000 mcast-group 225.1.1.1
  member vni 7500 mcast-group 227.1.1.1

interface Bdi50
 no shutdown
 ip address 10.50.50.51/24

interface Bdi75
 no shutdown
 ip address 10.75.75.76/24

interface Ethernet7/30
  no switchport
  no shutdown
  service instance 1 vni
    no shutdown
    encapsulation profile VSI_50_TO_5000  default
  service instance 2 vni
    no shutdown
    encapsulation profile VSI_75_TO_7500 default

interface Ethernet10/7
  no switchport
  ip address 192.168.1.2/30
  ip pim sparse-mode
  no shutdown

interface loopback10
  ip address 10.10.10.2/32
  ip pim sparse-mode

请注意，VTEP上的内部接口配置为第3层端口（无交换机端口）。但是，没有为其分配IP。另外，必须注意，在VTEP上定义的BD值不必与用于向此设备发送流量的Vlan ID匹配。但是，封装配置文件中定义的dot1q到VNI映射（在内部接口上的服务实例下调用）应与Vlan ID匹配。

验证

使用本部分可确认配置能否正常运行。

输出示例

这些输出都处于稳定状态。VTEP 对等体已发现彼此，且二者间已在封装和解封两个方向传输流量。

VTEP-1

VTEP-1# show nve vni
Codes: CP - Control Plane        DP - Data Plane
       UC - Unconfigured         SA - Suppress ARP

Interface VNI      Multicast-group   State Mode Type [BD/VRF]      Flags
--------- -------- ----------------- ----- ---- ------------------ -----
nve1      5000     225.1.1.1         Up    DP   L2 [50]
nve1      7500     227.1.1.1         Up    DP   L2 [75]

VTEP-1# show running-config interface nve 1

interface nve1
  no shutdown
  source-interface loopback10
  member vni 5000 mcast-group 225.1.1.1
  member vni 7500 mcast-group 227.1.1.1

VTEP-1# show service instance vni detail

VSI: VSI-Ethernet7/17.1
If-index: 0x35310001
Admin Status: Up
Oper Status: Up
Auto-configuration Mode: No
encapsulation profile vni VSI_50_TO_5000
  dot1q 50 vni 5000
Dot1q   VNI     BD
------------------
50      5000    50

VSI: VSI-Ethernet7/17.2
If-index: 0x35310002
Admin Status: Up
Oper Status: Up
Auto-configuration Mode: No
encapsulation profile vni TEST
  dot1q 100 vni 7500
Dot1q   VNI     BD
------------------
100     7500    75

VTEP-1# show bridge-domain

Bridge-domain 50  (2 ports in all)
Name:: Bridge-Domain50
 Administrative State: UP               Operational State: UP
        VSI-Eth7/17.1
        vni5000
        nve1

Bridge-domain 75  (2 ports in all)
Name:: Bridge-Domain75
 Administrative State: UP               Operational State: UP
        VSI-Eth7/17.2
        vni7500
        nve1

VTEP-1# show mac address-table dynamic
 Note: MAC table entries displayed are getting read from software.
 Use the 'hardware-age' keyword to get information related to 'Age'

 Legend:
        * - primary entry, G - Gateway MAC, (R) - Routed MAC, O - Overlay MAC
        age - seconds since last seen,+ - primary entry using vPC Peer-Link, E -
 EVPN entry
        (T) - True, (F) - False ,  ~~~ - use 'hardware-age' keyword to retrieve
age info
  VLAN/BD   MAC Address      Type      age     Secure NTFY Ports/SWID.SSID.LID
---------+-----------------+--------+---------+------+----+------------------
* 50       547f.eeec.af43    dynamic     ~~~      F    F  nve1/10.10.10.2
* 50       547f.eeec.af44    dynamic     ~~~      F    F  VSI-Eth7/17.1
* 50       547f.eeec.af45    dynamic     ~~~      F    F  nve1/10.10.10.2
* 75       547f.eeec.af44    dynamic     ~~~      F    F  VSI-Eth7/17.2
* 75       547f.eeec.af45    dynamic     ~~~      F    F  nve1/10.10.10.2

VTEP-1# show ip mroute detail
IP Multicast Routing Table for VRF "default"

Total number of routes: 7
Total number of (*,G) routes: 2
Total number of (S,G) routes: 4
Total number of (*,G-prefix) routes: 1

(*, 225.1.1.1/32), uptime: 19:51:28, nve(1) ip(0) pim(1)
  Data Created: No
  VXLAN Flags
    VXLAN Encap
  Stats: 0/0 [Packets/Bytes], 0.000   bps
  Incoming interface: Ethernet10/1, RPF nbr: 1.1.1.1
  Outgoing interface list: (count: 2)
    Ethernet10/1, uptime: 19:51:09, pim, (RPF)
    nve1, uptime: 19:51:28, nve

(10.10.10.1/32, 225.1.1.1/32), uptime: 19:51:28, nve(0) mrib(0) ip(0) pim(1)
  Data Created: No
  Received Register stop
  VXLAN Flags
    VXLAN Encap
  Stats: 19/2274 [Packets/Bytes], 0.000   bps
  Incoming interface: loopback10, RPF nbr: 10.10.10.1, internal
  Outgoing interface list: (count: 1)
    Ethernet10/1, uptime: 19:51:09, pim

(10.10.10.2/32, 225.1.1.1/32), uptime: 18:10:06, pim(1) mrib(1) ip(0)
  Data Created: Yes
  VXLAN Flags
    VXLAN Decap
  Stats: 9/846 [Packets/Bytes], 0.000   bps
  Incoming interface: Ethernet10/1, RPF nbr: 1.1.1.2, internal
  Outgoing interface list: (count: 2)
    Ethernet10/1, uptime: 01:00:32, pim, (RPF)
    nve1, uptime: 18:10:06, mrib

(*, 227.1.1.1/32), uptime: 12:52:13, nve(1) ip(0) pim(1)
  Data Created: No
  VXLAN Flags
    VXLAN Encap
  Stats: 0/0 [Packets/Bytes], 0.000   bps
  Incoming interface: Ethernet10/1, RPF nbr: 1.1.1.1
  Outgoing interface list: (count: 2)
    Ethernet10/1, uptime: 12:51:52, pim, (RPF)
    nve1, uptime: 12:52:13, nve

(10.10.10.1/32, 227.1.1.1/32), uptime: 12:52:13, nve(0) mrib(0) ip(0) pim(1)
  Data Created: No
  Received Register stop
  VXLAN Flags
    VXLAN Encap
  Stats: 300/39850 [Packets/Bytes], 0.000   bps
  Incoming interface: loopback10, RPF nbr: 10.10.10.1, internal
  Outgoing interface list: (count: 1)
    Ethernet10/1, uptime: 12:51:52, pim

(10.10.10.2/32, 227.1.1.1/32), uptime: 12:51:34, pim(1) mrib(1) ip(0)
  Data Created: Yes
  VXLAN Flags
    VXLAN Decap
  Stats: 22/1928 [Packets/Bytes], 0.000   bps
  Incoming interface: Ethernet10/1, RPF nbr: 1.1.1.2, internal
  Outgoing interface list: (count: 2)
    Ethernet10/1, uptime: 00:52:14, pim, (RPF)
    nve1, uptime: 12:51:34, mrib

(*, 232.0.0.0/8), uptime: 20:56:33, pim(0) ip(0)
  Data Created: No
  Stats: 0/0 [Packets/Bytes], 0.000   bps
  Incoming interface: Null, RPF nbr: 0.0.0.0
  Outgoing interface list: (count: 0)

VTEP-1# show ip arp

Flags: * - Adjacencies learnt on non-active FHRP router
       + - Adjacencies synced via CFSoE
       # - Adjacencies Throttled for Glean
       D - Static Adjacencies attached to down interface

IP ARP Table for context default
Total number of entries: 4
Address         Age       MAC Address     Interface
10.50.50.1      00:11:32  547f.eeec.af44  Bdi50
10.50.50.2      00:11:14  547f.eeec.af44  Bdi50
10.75.75.1      00:10:45  547f.eeec.af44  Bdi75
10.75.75.2      00:15:04  547f.eeec.af45  Bdi75
192.168.1.2     00:05:39  547f.eeec.af43  Ethernet10/1

VTEP-1# show ip route
IP Route Table for VRF "default"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%<string>' in via output denotes VRF <string>

192.168.1.0/30, ubest/mbest: 1/0, attached
    *via 1.1.1.1, Eth10/1, [0/0], 20:25:13, direct
192.168.1.1/32, ubest/mbest: 1/0, attached
    *via 1.1.1.1, Eth10/1, [0/0], 20:25:13, local
10.10.10.1/32, ubest/mbest: 2/0, attached
    *via 10.10.10.1, Lo10, [0/0], 20:25:45, local
    *via 10.10.10.1, Lo10, [0/0], 20:25:45, direct
10.10.10.2/32, ubest/mbest: 1/0
    *via 1.1.1.2, Eth10/1, [1/0], 20:23:42, static
50.50.50.0/24, ubest/mbest: 1/0, attached
    *via 50.50.50.50, Bdi50, [0/0], 01:18:47, direct
50.50.50.50/32, ubest/mbest: 1/0, attached
    *via 50.50.50.50, Bdi50, [0/0], 01:18:47, local
75.75.75.0/24, ubest/mbest: 1/0, attached
    *via 75.75.75.75, Bdi75, [0/0], 01:10:05, direct
75.75.75.75/32, ubest/mbest: 1/0, attached
    *via 75.75.75.75, Bdi75, [0/0], 01:10:05, local

注意：所有这些输出都通过拓扑中所有主机之间的全网状流量收集。

VTEP-2

VTEP-2# show nve vni
Codes: CP - Control Plane        DP - Data Plane
       UC - Unconfigured         SA - Suppress ARP

Interface VNI      Multicast-group   State Mode Type [BD/VRF]      Flags
--------- -------- ----------------- ----- ---- ------------------ -----
nve1      5000     225.1.1.1         Up    DP   L2 [50]
nve1      7500     227.1.1.1         Up    DP   L2 [75]

VTEP-2# show running-config interface nve 1

interface nve1
  no shutdown
  source-interface loopback10
  member vni 5000 mcast-group 225.1.1.1
  member vni 7500 mcast-group 227.1.1.1

VTEP-2# show service instance vni detail

VSI: VSI-Ethernet7/30.1
If-index: 0x3531d001
Admin Status: Up
Oper Status: Up
Auto-configuration Mode: No
encapsulation profile vni VSI_50_TO_5000
  dot1q 50 vni 5000
Dot1q   VNI     BD
------------------
50      5000    50

VSI: VSI-Ethernet7/30.2
If-index: 0x3531d002
Admin Status: Up
Oper Status: Up
Auto-configuration Mode: No
encapsulation profile vni TEST
  dot1q 100 vni 7500
Dot1q   VNI     BD
------------------
100     7500    75

VTEP-2# show bridge-domain

Bridge-domain 50  (2 ports in all)
Name:: Bridge-Domain50
 Administrative State: UP               Operational State: UP
        vni5000
        VSI-Eth7/30.1
        nve1

Bridge-domain 75  (2 ports in all)
Name:: Bridge-Domain75
 Administrative State: UP               Operational State: UP
        vni7500
        VSI-Eth7/30.2
        nve1

VTEP-2# show mac address-table dynamic
 Note: MAC table entries displayed are getting read from software.
 Use the 'hardware-age' keyword to get information related to 'Age'

 Legend:
        * - primary entry, G - Gateway MAC, (R) - Routed MAC, O - Overlay MAC
        age - seconds since last seen,+ - primary entry using vPC Peer-Link, E -
 EVPN entry
        (T) - True, (F) - False ,  ~~~ - use 'hardware-age' keyword to retrieve
age info
  VLAN/BD   MAC Address      Type      age     Secure NTFY Ports/SWID.SSID.LID
---------+-----------------+--------+---------+------+----+------------------
* 50       547f.eeec.af44    dynamic     ~~~      F    F  nve1/10.10.10.1
* 50       547f.eeec.af45    dynamic     ~~~      F    F  VSI-Eth7/30.1
* 75       547f.eeec.af45    dynamic     ~~~      F    F  VSI-Eth7/30.2
* 75       547f.eeec.af48    dynamic     ~~~      F    F  nve1/10.10.10.1

VTEP-2# show ip mroute detail
IP Multicast Routing Table for VRF "default"

Total number of routes: 5
Total number of (*,G) routes: 2
Total number of (S,G) routes: 2
Total number of (*,G-prefix) routes: 1

(*, 225.1.1.1/32), uptime: 19:56:19, nve(1) ip(0) pim(0)
  Data Created: No
  VXLAN Flags
    VXLAN Encap
  Stats: 8/748 [Packets/Bytes], 0.000   bps
  Incoming interface: Ethernet10/7, RPF nbr: 1.1.1.1
  Outgoing interface list: (count: 1)
    nve1, uptime: 19:56:19, nve

(10.10.10.2/32, 225.1.1.1/32), uptime: 19:56:19, nve(0) mrib(0) pim(1) ip(0)
  Data Created: No
  Received Register stop
  VXLAN Flags
    VXLAN Encap
  Stats: 9/834 [Packets/Bytes], 0.000   bps
  Incoming interface: loopback10, RPF nbr: 10.10.10.2
  Outgoing interface list: (count: 1)
    Ethernet10/7, uptime: 18:15:17, pim

(*, 227.1.1.1/32), uptime: 12:57:03, nve(1) ip(0) pim(0)
  Data Created: No
  VXLAN Flags
    VXLAN Encap
  Stats: 10/864 [Packets/Bytes], 0.000   bps
  Incoming interface: Ethernet10/7, RPF nbr: 1.1.1.1
  Outgoing interface list: (count: 1)
    nve1, uptime: 12:57:03, nve

(10.10.10.2/32, 227.1.1.1/32), uptime: 12:57:03, nve(0) mrib(0) ip(0) pim(1)
  Data Created: No
  Received Register stop
  VXLAN Flags
    VXLAN Encap
  Stats: 30/2648 [Packets/Bytes], 0.000   bps
  Incoming interface: loopback10, RPF nbr: 10.10.10.2
  Outgoing interface list: (count: 1)
    Ethernet10/7, uptime: 12:56:45, pim

(*, 232.0.0.0/8), uptime: 18:20:36, pim(0) ip(0)
  Data Created: No
  Stats: 0/0 [Packets/Bytes], 0.000   bps
  Incoming interface: Null, RPF nbr: 0.0.0.0
  Outgoing interface list: (count: 0)

VTEP-2# show ip arp

Flags: * - Adjacencies learnt on non-active FHRP router
       + - Adjacencies synced via CFSoE
       # - Adjacencies Throttled for Glean
       D - Static Adjacencies attached to down interface

IP ARP Table for context default
Total number of entries: 4
Address         Age       MAC Address     Interface
10.50.50.1      00:11:30  547f.eeec.af44  Bdi50
10.50.50.2      00:17:07  547f.eeec.af45  Bdi50
10.75.75.1      00:04:14  547f.eeec.af45  Bdi75
10.75.75.2      00:03:24  547f.eeec.af45  Bdi75
192.168.1.1     00:10:52  547f.eeec.af48  Ethernet10/7

VTEP-2# show ip route
IP Route Table for VRF "default"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%<string>' in via output denotes VRF <string>

192.168.1.0/30, ubest/mbest: 1/0, attached
    *via 1.1.1.2, Eth10/7, [0/0], 20:30:24, direct
192.168.1.2/32, ubest/mbest: 1/0, attached
    *via 1.1.1.2, Eth10/7, [0/0], 20:30:24, local
10.10.10.1/32, ubest/mbest: 1/0
    *via 1.1.1.1, Eth10/7, [1/0], 20:29:48, static
10.10.10.2/32, ubest/mbest: 2/0, attached
    *via 10.10.10.2, Lo10, [0/0], 20:29:39, local
    *via 10.10.10.2, Lo10, [0/0], 20:29:39, direct
50.50.50.0/24, ubest/mbest: 1/0, attached
    *via 50.50.50.51, Bdi50, [0/0], 01:22:50, direct
50.50.50.51/32, ubest/mbest: 1/0, attached
    *via 50.50.50.51, Bdi50, [0/0], 01:22:50, local
75.75.75.0/24, ubest/mbest: 1/0, attached
    *via 75.75.75.76, Bdi75, [0/0], 01:14:50, direct
75.75.75.76/32, ubest/mbest: 1/0, attached
    *via 75.75.75.76, Bdi75, [0/0], 01:14:50, local

注意：所有这些输出都通过拓扑中所有主机之间的全网状流量收集。

故障排除

目前没有针对此配置的故障排除信息。

由思科工程师提供

Bob Hobensack
Cisco TAC Engineer

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本文档适用于以下产品

Nexus 7000 Series Switches

在Nexus 7K上配置VXLAN泛洪和学习

下载选项

非歧视性语言

关于此翻译

目录

简介

先决条件

要求

使用的组件

配置

网络图

配置

VTEP-1

VTEP-2

验证

输出示例

VTEP-1

VTEP-2

故障排除

由思科工程师提供

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联系我们

本文档适用于以下产品