為採用NX-OS和Windows Server 2022的Nexus 9000配置和驗證VxLAN交換矩陣中的DHCP
目錄
簡介
本文說明如何使用Nexus 9000交換機對VxLAN交換矩陣中的DHCP進行配置和故障排除。
必要條件
需求
思科建議您瞭解以下主題：
- Nexus NX-OS軟體。
- 虛擬連線埠通道(vPC)。
- VxLAN BGP L2VPN EVPN
- BGP位址系列IPv4
- OSPF
- 多點傳送PIM（稀疏模式）
- DHCP
採用元件
本文中的資訊係根據以下軟體和硬體版本：
- Cisco Nexus 9000和Cisco NX-OS。
- N9K-C93180YC-EX
- N9K-C93180YC-FX
- NX-OS 10.3(4a)
- Windows Server 2022資料中心
本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。
附註：任何有關第三方軟體或硬體的組態和可整合性的問題均不在思科支援範圍之內。使用第三方工具是向客戶展示您使用思科裝置的配置和操作的最佳方式。
背景資訊
實驗室中VxLAN的底層與重疊組態
實驗室中的VxLAN交換矩陣圖
- 骨幹:
- 此Nexus交換機傳送DHCP（發現、提供、請求、確認）資料包，在此場景中不會解除封裝。僅使用外部報頭。
- 充當網路交換矩陣中的中心路由點。
- 負責連線所有LEAF交換機並促進它們之間的資料流。
- 參與BGP以將EVPN路由分發到枝葉交換機。
- 執行IP路由，並可以通過檢視外部IP報頭在不同的子網或VxLAN網段之間路由流量。
- 將重疊網路(VxLAN)與底層物理網路分離。
- 使用傳統IP路由協定管理底層，而重疊則由使用BGP EVPN的VxLAN管理，從而提供可擴展且靈活的網路架構。
- LEAF-1:
- 枝葉交換機為伺服器、儲存裝置和其他網路裝置等終端提供物理連線。
- 枝葉交換機充當VTEP，這意味著它們會封裝和解除封裝VxLAN資料包。
- 在此情況中，主機#1發出IP地址請求。
- LEAF-1負責將DCHP資料包封裝在VxLAN報頭中。
- 主機#1以傳統乙太網透明方式接收DCHP資料包。
- LEAF-1-vPC和LEAF-2-vPC:
- 通過運行BGP和交換路由資訊，枝葉交換機參與EVPN控制平面。這允許分配MAC和IP地址資訊，確保流量可以通過VxLAN交換矩陣高效路由。
- 在此案例中，DHCP伺服器與VNI 101010的VLAN 10以及主機#1相關聯。這表示它只是VxLAN橋接。
- 如果DHCP伺服器與HOST#1以外的VNI關聯，則路由嚴格需要L3VNI。必須建立源和目標VNI。
- DCHP伺服器以傳統乙太網透明方式接收DCHP資料包。
- vPC中的兩台Nexus交換機均接收BUM流量，但只有在vPC中運行的主要Nexus交換機傳送流量。輔助Nexus交換機丟棄流量。在此方案中，LEAF-1-vPC在操作上為主裝置。
- 必須使用infra-vlan，因為如果LEAF-2-vPC到SPINE的介面關閉，則無法傳送DCHP資料包。要將VxLAN封裝的流量傳送到LEAF-1-vPC，需要此備份VLAN。這樣，LEAF-1-vPC可以將DCHP資料包傳送到SPINE。
- N9K-ACCESS:
- 此Nexus交換機僅使用vPC埠通道為主機2冗餘目的提供到兩個枝葉的連線
骨幹
nv overlay evpn
feature ospf
feature bgp
feature pim
feature netconf
feature nv overlay
ip pim rp-address 192.168.11.11 group-list 224.10.10.0/24
ip pim ssm range 232.0.0.0/8
ip pim anycast-rp 192.168.11.11 192.168.0.11
ip prefix-list direct_routes seq 5 permit 10.104.11.0/30 le 32
route-map redistribution permit 10
match ip address prefix-list direct_routes
interface Ethernet1/1
speed 1000
ip address 10.104.11.1/30
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
no shutdown
interface Ethernet1/2
ip address 10.102.11.1/30
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
no shutdown
interface Ethernet1/3
speed 1000
ip address 10.103.11.1/30
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
no shutdown
interface loopback0
description ANYCAST-RP
ip address 192.168.0.11/32
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface loopback1
description ANYCAST-RP-CANDIDATE
ip address 192.168.11.11/32
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
router ospf 1
router bgp 65000
neighbor 192.168.3.3
remote-as 65000
update-source loopback0
address-family l2vpn evpn
send-community
send-community extended
route-reflector-client
neighbor 192.168.4.4
remote-as 65000
update-source loopback0
address-family l2vpn evpn
send-community
send-community extended
route-reflector-client
neighbor 192.168.5.5
remote-as 65000
update-source loopback0
address-family l2vpn evpn
send-community
send-community extended
route-reflector-clientLEAF-1
nv overlay evpn
feature ospf
feature bgp
feature pim
feature interface-vlan
feature vn-segment-vlan-based
feature dhcp
feature nv overlay
fabric forwarding anycast-gateway-mac 0000.0a0a.0a0a
ip pim rp-address 192.168.11.11 group-list 224.10.10.0/24
ip pim ssm range 232.0.0.0/8
vlan 1,10,20,300
vlan 10
vn-segment 101010
vlan 20
vn-segment 202020
vlan 300
vn-segment 303030
spanning-tree vlan 10 priority 4096
ip prefix-list host_subnets seq 5 permit 10.10.10.0/24 le 32
ip prefix-list host_subnets seq 10 permit 192.168.20.0/24 le 32
ip prefix-list host_subnets seq 15 permit 172.16.10.8/32
route-map direct_routes_tenant-a permit 10
match ip address prefix-list host_subnets
vrf context tenant-a
vni 303030
rd auto
address-family ipv4 unicast
route-target both auto
route-target both auto evpn
interface Vlan10
no shutdown
vrf member tenant-a
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150
ip dhcp relay source-interface loopback100
interface Vlan20
no shutdown
vrf member tenant-a
no ip redirects
ip address 192.168.20.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
interface Vlan300
no shutdown
vrf member tenant-a
no ip redirects
ip forward
no ipv6 redirects
interface nve1
no shutdown
host-reachability protocol bgp
source-interface loopback0
member vni 101010
suppress-arp
mcast-group 224.10.10.10
member vni 202020
suppress-arp
mcast-group 224.10.10.10
member vni 303030 associate-vrf
interface Ethernet1/1
ip address 10.104.11.2/30
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
no shutdown
interface loopback0
description UNDERLAY-VERIFICATION
ip address 192.168.5.5/32
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface loopback100
vrf member tenant-a
ip address 172.16.10.8/32
router ospf 1
router bgp 65000
address-family ipv4 unicast
neighbor 192.168.0.11
remote-as 65000
update-source loopback0
address-family l2vpn evpn
send-community
send-community extended
vrf tenant-a
address-family ipv4 unicast
redistribute direct route-map direct_routes_tenant-a
evpn
vni 101010 l2
rd auto
route-target import auto
route-target export auto
vni 202020 l2
rd auto
route-target import auto
route-target export autoLEAF-1-vPC
nv overlay evpn
feature ospf
feature bgp
feature pim
feature interface-vlan
feature vn-segment-vlan-based
feature lacp
feature dhcp
feature vpc
feature nv overlay
fabric forwarding anycast-gateway-mac 0000.0a0a.0a0a
ip pim rp-address 192.168.11.11 group-list 224.10.10.0/24
ip pim ssm range 232.0.0.0/8
vlan 1,10,300,777
vlan 10
vn-segment 101010
vlan 300
vn-segment 303030
vlan 777
name BACKUP_VLAN_ROUTING_NVE_INFRA
spanning-tree vlan 1,10,300 hello-time 4
ip prefix-list host_subnets seq 5 permit 10.10.10.0/24 le 32
ip prefix-list host_subnets seq 15 permit 172.16.10.9/32
route-map direct_routes_tenant-a permit 10
match ip address prefix-list host_subnets
vrf context tenant-a
vni 303030
rd auto
address-family ipv4 unicast
route-target both auto
route-target both auto evpn
system nve infra-vlans 777
vpc domain 1
peer-switch
peer-keepalive destination 10.88.238.195
peer-gateway
layer3 peer-router
ip arp synchronize
interface Ethernet1/3
switchport
switchport mode trunk
switchport trunk allowed vlan 1,10,20
channel-group 10 mode active
no shutdown
interface Ethernet1/19
switchport
switchport mode trunk
channel-group 1 mode active
no shutdown
interface port-channel1
switchport
switchport mode trunk
spanning-tree port type network
vpc peer-link
interface port-channel10
switchport
switchport mode trunk
switchport trunk allowed vlan 1,10
vpc 10
interface mgmt0
vrf member management
ip address 10.88.238.194/29
interface loopback0
description UNDERLAY-VERIFICATION
ip address 192.168.3.3/32
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface loopback1
description OVERLAY-NVE
ip address 192.168.13.1/32
ip address 192.168.13.254/32 secondary
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface loopback10
vrf member tenant-a
ip address 172.16.10.1/32
interface loopback100
vrf member tenant-a
ip address 172.16.10.9/32
interface Vlan10
no shutdown
vrf member tenant-a
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150
ip dhcp relay source-interface loopback100
interface Vlan300
no shutdown
vrf member tenant-a
no ip redirects
ip forward
no ipv6 redirects
interface Vlan777
description BACKUP_UNDERLAY_INFRA-VLAN
no shutdown
no ip redirects
ip address 10.255.77.1/30
no ipv6 redirects
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface Ethernet1/2
ip address 10.102.11.2/30
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
no shutdown
interface nve1
no shutdown
host-reachability protocol bgp
advertise virtual-rmac
source-interface loopback1
member vni 101010
suppress-arp
mcast-group 224.10.10.10
member vni 303030 associate-vrf
router ospf 1
router bgp 65000
address-family ipv4 unicast
address-family l2vpn evpn
advertise-pip
neighbor 192.168.0.11
remote-as 65000
update-source loopback0
address-family l2vpn evpn
send-community
send-community extended
neighbor 192.168.88.2
remote-as 65000
description OVERLAY_BACKUP
update-source Vlan888
address-family l2vpn evpn
send-community
send-community extended
vrf tenant-a
address-family ipv4 unicast
redistribute direct route-map direct_routes_tenant-a
evpn
vni 101010 l2
rd auto
route-target import auto
route-target export auto
vni 202020 l2
rd auto
route-target import auto
route-target export autoLEAF-2-vPC
nv overlay evpn
feature ospf
feature bgp
feature pim
feature interface-vlan
feature vn-segment-vlan-based
feature lacp
feature dhcp
feature vpc
feature nv overlay
fabric forwarding anycast-gateway-mac 0000.0a0a.0a0a
ip pim rp-address 192.168.11.11 group-list 224.10.10.0/24
ip pim ssm range 232.0.0.0/8
vlan 1,10,20,300,777
vlan 10
vn-segment 101010
vlan 20
vn-segment 202020
vlan 300
vn-segment 303030
vlan 777
name BACKUP_VLAN_ROUTING_NVE_INFRA
spanning-tree vlan 1,10,20,300 hello-time 4
ip prefix-list host_subnets seq 5 permit 10.10.10.0/24 le 32
ip prefix-list host_subnets seq 10 permit 192.168.20.0/24 le 32
ip prefix-list host_subnets seq 15 permit 172.16.10.10/32
route-map direct_routes_tenant-a permit 10
match ip address prefix-list host_subnets
vrf context tenant-a
vni 303030
rd auto
address-family ipv4 unicast
route-target both auto
route-target both auto evpn
system nve infra-vlans 777
vpc domain 1
peer-switch
peer-keepalive destination 10.88.238.194
peer-gateway
layer3 peer-router
ip arp synchronize
interface Ethernet1/1
ip address 10.103.11.2/30
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
no shutdown
interface Ethernet1/19
switchport
switchport mode trunk
channel-group 1 mode active
no shutdown
interface port-channel1
switchport
switchport mode trunk
spanning-tree port type network
vpc peer-link
interface port-channel10
switchport
switchport mode trunk
switchport trunk allowed vlan 1,10,20
vpc 10
interface mgmt0
vrf member management
ip address 10.88.238.195/29
interface loopback0
description UNDERLAY-VERIFICATION
ip address 192.168.4.4/32
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface loopback1
description OVERLAY-NVE
ip address 192.168.13.2/32
ip address 192.168.13.254/32 secondary
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface loopback10
vrf member tenant-a
ip address 172.16.10.2/32
interface loopback100
vrf member tenant-a
ip address 172.16.10.10/32
interface Vlan10
no shutdown
vrf member tenant-a
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150
ip dhcp relay source-interface loopback100
interface Vlan20
no shutdown
vrf member tenant-a
no ip redirects
ip address 192.168.20.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
interface Vlan300
no shutdown
vrf member tenant-a
no ip redirects
ip forward
no ipv6 redirects
interface Vlan777
description BACKUP_UNDERLAY_INFRA-VLAN
no shutdown
no ip redirects
ip address 10.255.77.2/30
no ipv6 redirects
ip ospf network point-to-point
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
interface nve1
no shutdown
host-reachability protocol bgp
advertise virtual-rmac
source-interface loopback1
member vni 101010
suppress-arp
mcast-group 224.10.10.10
member vni 202020
suppress-arp
mcast-group 224.10.10.10
member vni 303030 associate-vrf
router ospf 1
router bgp 65000
address-family ipv4 unicast
address-family l2vpn evpn
advertise-pip
neighbor 192.168.0.11
remote-as 65000
update-source loopback0
address-family l2vpn evpn
send-community
send-community extended
neighbor 192.168.88.1
remote-as 65000
description OVERLAY_BACKUP
update-source Vlan888
address-family l2vpn evpn
send-community
send-community extended
vrf tenant-a
address-family ipv4 unicast
redistribute direct route-map direct_routes_tenant-a
evpn
vni 101010 l2
rd auto
route-target import auto
route-target export auto
vni 202020 l2
rd auto
route-target import auto
route-target export autoN9K-ACCESS
feature lacp
vlan 1,10
interface port-channel10
switchport
switchport mode trunk
interface Ethernet1/11
switchport
switchport access vlan 10
no shutdown
interface Ethernet1/45
switchport
switchport mode trunk
channel-group 10 mode active
no shutdown
interface Ethernet1/46
switchport
switchport mode trunk
channel-group 10 mode active
no shutdownNexus交換機上的DHCP配置
LEAF-1
步驟1.啟用功能DCHP。
LEAF-1(config)# feature dhcp附註：自NX-OS 7.x以來，DHCP伺服器和中繼代理命令service dhcp、ip dhcp relay和ipv6 dhcp relay預設啟用。
步驟2.應用命令ip dhcp relay information 。
LEAF-1(config)# ip dhcp relay information option附註：此命令使DHCP中繼代理可以插入和刪除選項82有關轉發資料包的資訊。
步驟3.應用命令ip dhcp relay information option vpn。
LEAF-1(config)# ip dhcp relay information option vpn附註：此命令啟用到達該DHCP伺服器所屬的不同VRF的DHCP中繼請求。
步驟4.應用命令「ip dhcp relay address [DCHP server的ip address]」。
附註：在本示例中，DCHP伺服器的IP地址為10.10.10.150。
LEAF-1(config)# interface vlan 10
LEAF-1(config-if)# ip dhcp relay address 10.10.10.150步驟5.應用命令「ip dhcp relay source-interface [unique loopback]」。
附註：此命令配置DHCP中繼代理的源IP地址來處理單播通訊的Discover、Offer、Request和ACK，DHCP中繼代理使用SVI的IP地址作為DHCP中繼代理的源IP地址。這不是所需的，因為此IP地址由多個VTEP共用，並且可能會發生DHCP資料包的黑洞。要避免這種情況，必須使用一個唯一的IP地址（使用環回介面）來區分每個VTEP。
LEAF-1(config)# interface vlan 10
LEAF-1(config-if)# ip dhcp relay source-interface loopback100步驟6.在BGP內對應的VRF租戶中，使用字首清單和路由對映（包括環回介面的IP地址）直接進行路由重分發。
附註：此環回介面屬於SVI的租戶。
LEAF-1(config)# show running-config interface loopback 100
interface loopback100
vrf member tenant-a
ip address 172.16.10.8/32
LEAF-1(config)# ip prefix-list host_subnets seq 15 permit 172.16.10.8/32
LEAF-1(config)# route-map direct_routes_tenant-a permit 10
LEAF-1(config-route-map)# match ip address prefix-list host_subnets
LEAF-1(config-route-map)# router bgp 65000
LEAF-1(config-router)# vrf tenant-a
LEAF-1(config-router-vrf)# address-family ipv4 unicast
LEAF-1(config-router-vrf-af)# redistribute direct route-map direct_routes_tenant-a步驟7.使用以下命令驗證回送介面的IP位址是否已在BGP L2VPN EVPN中通告給主幹網路：show bgp l2vpn evpn [loopback IP] vrf [tenant vrf]。
LEAF-1(config)# show bgp l2vpn evpn 172.16.10.8 vrf tenant-a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 192.168.5.5:4 (L3VNI 303030)
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.8]/224, version 421
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn
Advertised path-id 1
Path type: local, path is valid, is best path, no labeled nexthop
Gateway IP: 0.0.0.0
AS-Path: NONE, path locally originated
192.168.5.5 (metric 0) from 0.0.0.0 (192.168.5.5)
Origin incomplete, MED 0, localpref 100, weight 32768
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:707d.b9b8.4daf
Path-id 1 advertised to peers:
192.168.0.11 <<<< Spine步驟8.驗證回送介面的IP位址已注入到DHCP伺服器所在的BGP L2VPN EVPN中。
附註：如果vPC中有Nexus交換機，請確認它們都獲取BGP L2VPN EVPN中環回介面的IP地址。
LEAF-1# show bgp l2vpn evpn 172.16.10.8
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 192.168.5.5:4
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.8]/224, version 754
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not in HW
Advertised path-id 1
Path type: internal, path is valid, is best path, no labeled nexthop
Imported to 2 destination(s)
Imported paths list: tenant-a L3-303030
Gateway IP: 0.0.0.0
AS-Path: NONE, path sourced internal to AS
192.168.5.5 (metric 45) from 192.168.0.11 (192.168.0.11)
Origin incomplete, MED 0, localpref 100, weight 0
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:707d.b9b8.4daf
Originator: 192.168.5.5 Cluster list: 192.168.0.11
Path-id 1 not advertised to any peer
Route Distinguisher: 192.168.3.3:4 (L3VNI 303030)
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.8]/224, version 761
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not in HW
Advertised path-id 1
Path type: internal, path is valid, is best path, no labeled nexthop
Imported from 192.168.5.5:4:[5]:[0]:[0]:[32]:[172.16.10.8]/224
Gateway IP: 0.0.0.0
AS-Path: NONE, path sourced internal to AS
192.168.5.5 (metric 45) from 192.168.0.11 (192.168.0.11)
Origin incomplete, MED 0, localpref 100, weight 0
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:707d.b9b8.4daf
Originator: 192.168.5.5 Cluster list: 192.168.0.11
Path-id 1 not advertised to any peer步驟9.使用show ip route [DHCP server IP] vrf [tenant vrf]命令驗證源租戶上是否存在DHCP伺服器的路由。
附註：要使用的路由條目必須從VxLAN到預設VRF。如果沒有可用的路由，請檢查VTEP是否在本地知道DCHP伺服器IP地址。
LEAF-1# show running-config interface vlan 10
interface Vlan10
no shutdown
vrf member tenant-a <<<< source tenant
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150 <<<< DHCP server
ip dhcp relay source-interface loopback100
LEAF-1# show ip route 10.10.10.150 vrf tenant-a
10.10.10.150/32, ubest/mbest: 1/0
*via 192.168.13.254%default, [200/0], 2w0d, bgp-65000, internal, tag 65000, segid: 303030 tunnelid: 0xd0d0dfe encap: VXLAN步驟10.使用命令ping [DHCP伺服器IP] source-interface loopback [x] vrf [租戶vrf]，驗證是否可通過環回介面和相應的VRF作為VRF源來訪問DCHP伺服器IP。
LEAF-1# ping 10.10.10.150 source-interface loopback 100 vrf tenant-a
PING 10.10.10.150 (10.10.10.150): 56 data bytes
64 bytes from 10.10.10.150: icmp_seq=0 ttl=126 time=1.262 ms
64 bytes from 10.10.10.150: icmp_seq=1 ttl=126 time=0.833 ms
64 bytes from 10.10.10.150: icmp_seq=2 ttl=126 time=0.808 ms
64 bytes from 10.10.10.150: icmp_seq=3 ttl=126 time=0.795 ms
64 bytes from 10.10.10.150: icmp_seq=4 ttl=126 time=0.78 ms
--- 10.10.10.150 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss步驟11.檢驗DHCP中繼代理的狀態。
LEAF-1# show ip dhcp status
Current CLI Operation: show ip dhcp status
Last CLI Operation: DME: ip dhcp relay information option enable
Last CLI Operation Status: SUCCESS步驟12.檢驗選項82（例如vpn選項）以及中繼代理下正確的中繼IP地址。
LEAF-1# show ip dhcp relay
DHCP relay service is enabled <<<<<<
Insertion of option 82 is enabled <<<<<<
Insertion of option 82 customize circuitid is disabled
TLV format in CircuitId and RemoteId suboptions is enabled
Insertion of VPN suboptions is enabled <<<<<<<
Insertion of cisco suboptions is disabled
Global smart-relay is disabled
Relay Trusted functionality is disabled
Relay Trusted Port is Globally disabled
V4 Relay Source Address HSRP is Globally disabled
Server-ID-override-disable is disabled
Smart-relay is enabled on the following interfaces:
------------------------------------------------------
Subnet-broadcast is enabled on the following interfaces:
------------------------------------------------------
Relay Trusted Port is enabled on the following interfaces:
----------------------------------------------------------
Relay Source Address HSRP is enabled on the following interfaces:
-------------------------------------------------------------------
Helper addresses are configured on the following interfaces:
Interface Relay Address VRF Name
------------- ------------- --------
Vlan10 10.10.10.150 <<<<<<<<<步驟13.檢驗已處理和轉發的資料包的統計資訊。
LEAF-1# show ip dhcp global statistics
Packets processed 1297177
Packets received through cfsoe 0
Packets forwarded 1297175
Packets forwarded on cfsoe 0
Total packets dropped 0
Packets dropped from untrusted ports 0
Packets dropped due to MAC address check failure 0
Packets dropped due to Option 82 insertion failure 0
Packets dropped due to o/p intf unknown 0
Packets dropped which were unknown 0
Packets dropped due to no trusted ports 0
Packets dropped due to dhcp relay not enabled 0
Packets dropped due to no binding entry 0
Packets dropped due to interface error/no interface 0
Packets dropped due to max hops exceeded 0
Packets dropped due to Queue full 0步驟14.檢驗中繼資料包的統計資訊。
LEAF-1# show ip dhcp relay statistics
----------------------------------------------------------------------
Message Type Rx Tx Drops
----------------------------------------------------------------------
Discover 260521 260520 0
Offer 289330 289330 0
Request(*) 267162 267161 0
Ack 8322 8322 0
Release(*) 181121 181121 0
Decline 1 1 0
Inform(*) 0 0 0
Nack 289280 289280 0
----------------------------------------------------------------------
Total 1295737 1295735 0
----------------------------------------------------------------------
DHCP L3 FWD:
Total Packets Received : 0
Total Packets Forwarded : 0
Total Packets Dropped : 0
Non DHCP:
Total Packets Received : 0
Total Packets Forwarded : 0
Total Packets Dropped : 0
DROP:
DHCP Relay not enabled : 0
Invalid DHCP message type : 0
Interface error : 0
Tx failure towards server : 0
Tx failure towards client : 0
Unknown output interface : 0
Unknown vrf or interface for server : 0
Max hops exceeded : 0
Option 82 validation failed : 0
Packet Malformed : 0
DHCP Request dropped on MCT : 0
Relay Trusted port not configured : 0
* - These counters will show correct value when switch
receives DHCP request packet with destination ip as broadcast
address. If request is unicast it will be HW switched枝葉–1-vPC DHCP
步驟1.啟用功能DCHP。
LEAF-1-VPC(config)#feature dhcp附註：自NX-OS 7.x以來，DHCP伺服器和中繼代理命令service dhcp、ip dhcp relay和ipv6 dhcp relay預設啟用。
步驟2.應用命令ip dhcp relay information 。
LEAF-1-VPC(config)#ip dhcp relay information option附註：此命令使DHCP中繼代理可以插入和刪除選項82有關轉發資料包的資訊。
步驟3.應用命令「ip dhcp relay information option vpn」。
LEAF-1-VPC(config)# ip dhcp relay information option vpn附註：此命令啟用到達該DHCP伺服器所屬的不同VRF的DHCP中繼請求。
步驟4.應用命令ip dhcp relay address [DCHP伺服器的ip地址]。
附註：在本示例中，DCHP伺服器的IP地址為10.10.10.150。
LEAF-1-VPC(config)#interface vlan 10
LEAF-1-VPC(config-if)#ip dhcp relay address 10.10.10.150步驟5.應用命令「ip dhcp relay source-interface [unique loopback]」。
附註：此命令配置DHCP中繼代理的源IP地址來處理單播通訊的Discover、Offer、Request和ACK，DHCP中繼代理使用SVI的IP地址作為DHCP中繼代理的源IP地址。這不是所需的，因為此IP地址由多個VTEP共用，並且可能會發生DHCP資料包的黑洞。要避免這種情況，必須使用一個唯一的IP地址（使用環回介面）來區分每個VTEP。
LEAF-1-VPC(config)#interface vlan 10
LEAF-1-VPC(config-if)# ip dhcp relay source-interface loopback100步驟6.在BGP內對應的VRF租戶中，使用字首清單和路由對映（包括環回介面的IP地址）直接進行路由重分發。
附註：此環回介面屬於SVI的租戶。
LEAF-1-VPC(config)# show running-config interface loopback 100
interface loopback100
vrf member tenant-a
ip address 172.16.10.9/32
LEAF-1-VPC(config)# ip prefix-list host_subnets seq 15 permit 172.16.10.9/32
LEAF-1-VPC(config)# route-map direct_routes_tenant-a permit 10
LEAF-1-VPC(config-route-map)# match ip address prefix-list host_subnets
LEAF-1-VPC(config-route-map)# router bgp 65000
LEAF-1-VPC(config-router)# vrf tenant-a
LEAF-1-VPC(config-router-vrf)# address-family ipv4 unicast
LEAF-1-VPC(config-router-vrf-af)# redistribute direct route-map direct_routes_tenant-a步驟7.使用以下命令驗證回送介面的IP位址是否已在BGP L2VPN EVPN中通告給主幹網路：show bgp l2vpn evpn [loopback IP] vrf [tenant vrf]。
LEAF-1-VPC# show bgp l2vpn evpn 172.16.10.9 vrf tenant-a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 192.168.3.3:4 (L3VNI 303030)
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.9]/224, version 637
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn
Advertised path-id 1
Path type: local, path is valid, is best path, no labeled nexthop
Gateway IP: 0.0.0.0
AS-Path: NONE, path locally originated
192.168.13.1 (metric 0) from 0.0.0.0 (192.168.3.3)
Origin incomplete, MED 0, localpref 100, weight 32768
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:6026.aa85.9887
Path-id 1 advertised to peers:
192.168.0.11 步驟8.驗證回送介面的IP位址已注入到DHCP伺服器所在的BGP L2VPN EVPN中。
附註：如果vPC中有Nexus交換機，請確認它們都獲取BGP L2VPN EVPN中環回介面的IP地址。
LEAF-1-VPC# show bgp l2vpn evpn 172.16.10.9
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 192.168.3.3:4 (L3VNI 303030)
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.9]/224, version 637
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn
Advertised path-id 1
Path type: local, path is valid, is best path, no labeled nexthop
Gateway IP: 0.0.0.0
AS-Path: NONE, path locally originated
192.168.13.1 (metric 0) from 0.0.0.0 (192.168.3.3)
Origin incomplete, MED 0, localpref 100, weight 32768
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:6026.aa85.9887
Path-id 1 advertised to peers:
192.168.0.11 步驟9.使用命令show ip route [DHCP server IP] vrf[tenant vrf]驗證源租戶上是否存在DHCP服務器的路由。
附註：要使用的路由條目必須從VxLAN到預設VRF。如果沒有可用的路由，請檢查VTEP是否在本地知道DCHP伺服器IP地址。
LEAF-1-VPC# show running-config interface vlan 10
interface Vlan10
no shutdown
vrf member tenant-a <<<< source tenant
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150
ip dhcp relay source-interface loopback100
LEAF-1-VPC# show ip route 10.10.10.150 vrf tenant-a
10.10.10.150/32, ubest/mbest: 1/0, attached
*via 10.10.10.150, Vlan10, [190/0], 6d07h, hmm步驟10.使用命令ping [DHCP伺服器IP] source-interface loopback [x] vrf [tenvrf]，使用環回介面和相應的VRF作為VRF源來驗證DCHP伺服器IP是否可訪問。
LEAF-1-VPC# ping 10.10.10.150 source-interface loopback 100 vrf tenant-a
PING 10.10.10.150 (10.10.10.150): 56 data bytes
64 bytes from 10.10.10.150: icmp_seq=0 ttl=126 time=0.965 ms
64 bytes from 10.10.10.150: icmp_seq=1 ttl=126 time=0.57 ms
64 bytes from 10.10.10.150: icmp_seq=2 ttl=126 time=0.488 ms
64 bytes from 10.10.10.150: icmp_seq=3 ttl=126 time=0.524 ms
64 bytes from 10.10.10.150: icmp_seq=4 ttl=126 time=0.502 ms
--- 10.10.10.150 ping statistics ---步驟11.檢驗DHCP中繼代理的狀態。
LEAF-1-VPC# show ip dhcp status
Current CLI Operation: show ip dhcp status
Last CLI Operation: DME: ip dhcp relay information option vpn enable
Last CLI Operation Status: SUCCESS步驟12.檢驗選項82（例如vpn選項）以及中繼代理下正確的中繼IP地址。
LEAF-1-VPC# show ip dhcp relay
DHCP relay service is enabled <<<<<<
Insertion of option 82 is enabled <<<<<<<
Insertion of option 82 customize circuitid is disabled
TLV format in CircuitId and RemoteId suboptions is enabled
Insertion of VPN suboptions is enabled <<<<<<<
Insertion of cisco suboptions is disabled
Global smart-relay is disabled
Relay Trusted functionality is disabled
Relay Trusted Port is Globally disabled
V4 Relay Source Address HSRP is Globally disabled
Server-ID-override-disable is disabled
Smart-relay is enabled on the following interfaces:
------------------------------------------------------
Subnet-broadcast is enabled on the following interfaces:
------------------------------------------------------
Relay Trusted Port is enabled on the following interfaces:
----------------------------------------------------------
Relay Source Address HSRP is enabled on the following interfaces:
-------------------------------------------------------------------
Helper addresses are configured on the following interfaces:
Interface Relay Address VRF Name
------------- ------------- --------
Vlan10 10.10.10.150 <<<<<<<<<步驟13.檢驗已處理和轉發的資料包的統計資訊。
LEAF-1-VPC# show ip dhcp global statistics
Packets processed 263162
Packets received through cfsoe 0
Packets forwarded 263161
Packets forwarded on cfsoe 0
Total packets dropped 0
Packets dropped from untrusted ports 0
Packets dropped due to MAC address check failure 0
Packets dropped due to Option 82 insertion failure 0
Packets dropped due to o/p intf unknown 0
Packets dropped which were unknown 0
Packets dropped due to no trusted ports 0
Packets dropped due to dhcp relay not enabled 0
Packets dropped due to no binding entry 0
Packets dropped due to interface error/no interface 0
Packets dropped due to max hops exceeded 0
Packets dropped due to Queue full 0步驟14.檢驗中繼資料包的統計資訊。
LEAF-1-VPC# show ip dhcp relay statistics
----------------------------------------------------------------------
Message Type Rx Tx Drops
----------------------------------------------------------------------
Discover 8 7 0
Offer 29304 29304 0
Request(*) 5029 5029 0
Ack 6535 6535 0
Release(*) 191482 191482 0
Decline 0 0 0
Inform(*) 3 3 0
Nack 29281 29281 0
----------------------------------------------------------------------
Total 261642 261641 0
----------------------------------------------------------------------
DHCP L3 FWD:
Total Packets Received : 0
Total Packets Forwarded : 0
Total Packets Dropped : 0
Non DHCP:
Total Packets Received : 0
Total Packets Forwarded : 0
Total Packets Dropped : 0
DROP:
DHCP Relay not enabled : 0
Invalid DHCP message type : 0
Interface error : 0
Tx failure towards server : 0
Tx failure towards client : 0
Unknown output interface : 0
Unknown vrf or interface for server : 0
Max hops exceeded : 0
Option 82 validation failed : 0
Packet Malformed : 0
DHCP Request dropped on MCT : 0
Relay Trusted port not configured : 0
* - These counters will show correct value when switch
receives DHCP request packet with destination ip as broadcast
address. If request is unicast it will be HW switched枝葉–2-vPC DHCP
步驟1.啟用功能DCHP。
LEAF-2-VPC(config)# feature dhcp附註：自NX-OS 7.x以來，DHCP伺服器和中繼代理命令service dhcp、ip dhcp relay和ipv6 dhcp relay預設處於啟用狀態。
步驟2.應用命令「ip dhcp relay information option」。
LEAF-2-VPC(config)# ip dhcp relay information option附註：此命令使DHCP中繼代理可以插入和刪除選項82有關轉發資料包的資訊。
步驟3.應用命令「ip dhcp relay information option vpn」。
LEAF-2-VPC(config)# ip dhcp relay information option vpn附註：此命令啟用到達該DHCP伺服器所屬的不同VRF的DHCP中繼請求。
步驟4.應用命令「ip dhcp relay address [DCHP server的ip address]」。
附註：在本示例中，DCHP伺服器的IP地址為10.10.10.150。
LEAF-2-VPC(config)# interface vlan 10
LEAF-2-VPC(config-if)# ip dhcp relay address 10.10.10.150步驟5.應用命令「ip dhcp relay source-interface [unique loopback]」。
附註：此命令配置DHCP中繼代理的源IP地址來處理單播通訊的Discover、Offer、Request和ACK，DHCP中繼代理使用SVI的IP地址作為DHCP中繼代理的源IP地址。這不是所需的，因為此IP地址由多個VTEP共用，並且可能會發生DHCP資料包的黑洞。要避免這種情況，必須使用一個唯一的IP地址（使用環回介面）來區分每個VTEP。
LEAF-2-VPC(config)# interface vlan 10
LEAF-2-VPC(config-if)# ip dhcp relay source-interface loopback 100步驟6.在BGP內對應的VRF租戶中，使用字首清單和路由對映（包括環回介面的IP地址）直接進行路由重分發。
附註：此環回介面屬於SVI的租戶。
LEAF-2-VPC(config-if)# show running-config interface loopback 100
interface loopback100
vrf member tenant-a
ip address 172.16.10.10/32
LEAF-2-VPC(config)# ip prefix-list host_subnets seq 15 permit 172.16.10.10/32
LEAF-2-VPC(config)# route-map direct_routes_tenant-a permit 10
LEAF-2-VPC(config-route-map)# match ip address prefix-list host_subnets
LEAF-2-VPC(config-route-map)# router bgp 65000
LEAF-2-VPC(config-router)# vrf tenant-a
LEAF-2-VPC(config-router-vrf)# address-family ipv4 unicast
LEAF-2-VPC(config-router-vrf-af)# redistribute direct route-map direct_routes_tenant-a
步驟7.使用以下命令驗證回送介面的IP位址是否已在BGP L2VPN EVPN中通告給主幹網路：show bgp l2vpn evpn [loopback IP] vrf [tenant vrf]。
LEAF-2-VPC(config-if)# show bgp l2vpn evpn 172.16.10.10 vrf tenant-a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 192.168.4.4:4 (L3VNI 303030)
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.10]/224, version 49
5
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn
Advertised path-id 1
Path type: local, path is valid, is best path, no labeled nexthop
Gateway IP: 0.0.0.0
AS-Path: NONE, path locally originated
192.168.13.2 (metric 0) from 0.0.0.0 (192.168.4.4)
Origin incomplete, MED 0, localpref 100, weight 32768
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:6026.aa85.9587
Path-id 1 advertised to peers:
192.168.0.11 <<<<< Spine 步驟8.驗證回送介面的IP位址已注入到DHCP伺服器所在的BGP L2VPN EVPN中。
附註：如果vPC中有Nexus交換機，請確認它們都獲取BGP L2VPN EVPN中環回介面的IP地址。
LEAF-2-VPC(config-if)# show bgp l2vpn evpn 172.16.10.10
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 192.168.4.4:4 (L3VNI 303030)
BGP routing table entry for [5]:[0]:[0]:[32]:[172.16.10.10]/224, version 49
5
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn
Advertised path-id 1
Path type: local, path is valid, is best path, no labeled nexthop
Gateway IP: 0.0.0.0
AS-Path: NONE, path locally originated
192.168.13.2 (metric 0) from 0.0.0.0 (192.168.4.4)
Origin incomplete, MED 0, localpref 100, weight 32768
Received label 303030
Extcommunity: RT:65000:303030 ENCAP:8 Router MAC:6026.aa85.9587
Path-id 1 advertised to peers:
192.168.0.11 步驟9.使用show ip route [DHCP server IP] vrf[tenvrf]命令驗證源租戶上是否存在DHCP伺服器的路由。
附註：要使用的路由條目必須從VxLAN到預設VRF。如果沒有可用的路由，請檢查VTEP是否在本地知道DCHP伺服器IP地址。
LEAF-2-VPC(config-if)# show running-config interface vlan 10
interface Vlan10
no shutdown
vrf member tenant-a
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150
ip dhcp relay source-interface loopback100
LEAF-2-VPC(config-if)# show ip route 10.10.10.150 vrf tenant-a
10.10.10.150/32, ubest/mbest: 1/0, attached
*via 10.10.10.150, Vlan10, [190/0], 01:01:28, hmm步驟10.使用命令ping [DHCP伺服器IP] source-interface loopback [x] vrf [租戶vrf]，驗證是否可通過環回介面和相應的VRF作為VRF源來訪問DCHP伺服器IP。
LEAF-2-VPC(config-if)# ping 10.10.10.150 source-interface loopback 100 vrf tenant-a
PING 10.10.10.150 (10.10.10.150): 56 data bytes
64 bytes from 10.10.10.150: icmp_seq=0 ttl=127 time=0.928 ms
64 bytes from 10.10.10.150: icmp_seq=1 ttl=127 time=0.475 ms
64 bytes from 10.10.10.150: icmp_seq=2 ttl=127 time=0.455 ms
64 bytes from 10.10.10.150: icmp_seq=3 ttl=127 time=0.409 ms
64 bytes from 10.10.10.150: icmp_seq=4 ttl=127 time=0.465 ms
--- 10.10.10.150 ping statistics ---步驟11.檢驗DHCP中繼代理的狀態。
LEAF-2-VPC(config)# show ip dhcp status
Current CLI Operation: show ip dhcp status
Last CLI Operation: DME: ip dhcp relay information option vpn enable
Last CLI Operation Status: SUCCESS步驟12.檢驗選項82（例如vpn選項）以及中繼代理下正確的中繼IP地址。
LEAF-2-VPC(config)# show ip dhcp relay
DHCP relay service is enabled <<<<<<<
Insertion of option 82 is enabled <<<<<<<<<
Insertion of option 82 customize circuitid is disabled
TLV format in CircuitId and RemoteId suboptions is enabled
Insertion of VPN suboptions is enabled <<<<<<<
Insertion of cisco suboptions is disabled
Global smart-relay is disabled
Relay Trusted functionality is disabled
Relay Trusted Port is Globally disabled
V4 Relay Source Address HSRP is Globally disabled
Server-ID-override-disable is disabled
Smart-relay is enabled on the following interfaces:
------------------------------------------------------
Subnet-broadcast is enabled on the following interfaces:
------------------------------------------------------
Relay Trusted Port is enabled on the following interfaces:
----------------------------------------------------------
Relay Source Address HSRP is enabled on the following interfaces:
-------------------------------------------------------------------
Helper addresses are configured on the following interfaces:
Interface Relay Address VRF Name
------------- ------------- --------
Vlan10 10.10.10.150 <<<<步驟13.檢驗已處理和轉發的資料包的統計資訊。
LEAF-2-VPC(config)# show ip dhcp global statistics
Packets processed 103030
Packets received through cfsoe 0
Packets forwarded 103030
Packets forwarded on cfsoe 0
Total packets dropped 0
Packets dropped from untrusted ports 0
Packets dropped due to MAC address check failure 0
Packets dropped due to Option 82 insertion failure 0
Packets dropped due to o/p intf unknown 0
Packets dropped which were unknown 0
Packets dropped due to no trusted ports 0
Packets dropped due to dhcp relay not enabled 0
Packets dropped due to no binding entry 0
Packets dropped due to interface error/no interface 0
Packets dropped due to max hops exceeded 0
Packets dropped due to Queue full 0步驟14.檢驗中繼資料包的統計資訊。
LEAF-2-VPC# show ip dhcp relay statistics
----------------------------------------------------------------------
Message Type Rx Tx Drops
----------------------------------------------------------------------
Discover 29312 29311 0
Offer 300001 300001 0
Request(*) 29324 29324 0
Ack 1574 1574 0
Release(*) 191493 191493 0
Decline 0 0 0
Inform(*) 1540 1540 0
Nack 472890 472890 0
----------------------------------------------------------------------
Total 1026134 1026133 0
----------------------------------------------------------------------
DHCP L3 FWD:
Total Packets Received : 0
Total Packets Forwarded : 0
Total Packets Dropped : 0
Non DHCP:
Total Packets Received : 0
Total Packets Forwarded : 0
Total Packets Dropped : 0
DROP:
DHCP Relay not enabled : 0
Invalid DHCP message type : 0
Interface error : 0
Tx failure towards server : 0
Tx failure towards client : 0
Unknown output interface : 0
Unknown vrf or interface for server : 0
Max hops exceeded : 0
Option 82 validation failed : 0
Packet Malformed : 0
DHCP Request dropped on MCT : 0
Relay Trusted port not configured : 0
* - These counters will show correct value when switch
receives DHCP request packet with destination ip as broadcast
address. If request is unicast it will be HW switchedWindows Server 2022上的DHCP伺服器配置
主機的IP編址範圍配置。
步驟1.開啟伺服器管理器，並驗證儀表板中的DCHP伺服器上沒有警報。
來自Windows Server 2022上的伺服器管理器的儀表板
提示：按兩下時，影象會放大。
步驟2.開啟DHCP服務器應用程式。
Windows Server 2022上的DHCP伺服器
步驟3.按一下右鍵IPv4，然後按一下New Scope。
DCHP中的新範圍
步驟4.按一下「Next」。
步驟5.寫入名稱及說明。在本例中，名稱是屬於VLAN 10的子網，說明是L2VNI（作為VLAN 10中列出的L2VNI）。
步驟6.配置IP地址範圍。這是主機的池。
步驟6.從VTEP中的SVI配置中排除共用IP地址。在本例中，介面VLAN 10的地址是IP.10.10.1/24。
警告：無法從SVI（或預設網關）中排除IP地址，可能導致IP地址重複並影響流量傳輸。
LEAF-1# show running-config interface vlan 10
interface Vlan10
no shutdown
vrf member tenant-a
no ip redirects
ip address 10.10.10.1/24
no ipv6 redirects
fabric forwarding mode anycast-gateway
ip dhcp relay address 10.10.10.150
ip dhcp relay source-interface loopback100 
步驟7.配置IP地址的租用期限。這表示主機在續訂分配IP位址之前可以使用分配的IP位址的時間。
步驟8.選擇是，我現在要配置這些選項。
步驟9.配置預設網關IP地址。
步驟10.配置域名和DNS伺服器。
步驟11.配置WINS伺服器（如果適用）。如果資訊未知，則可以跳過此步驟。
步驟12.選擇是，我想立即啟用此作用域。
將SVI中環回的唯一IP地址的作用域配置為DCHP中繼代理。
步驟1.按一下右鍵IPv4並選擇IPv4Scope。
DCHP中的新範圍
步驟2.寫下名稱和描述。在本例中， name是用於具有環回地址的子網的子網。
IPte:在VxLAN租戶的整個VxLAN交換矩陣中，環回使用環回唯一IP地址。必須在BGP的L2VPN EVPN路由重分配中在IPv4地址 — famIPv4中相應租戶的VRF內通告此項
LEAF-1# show running-config interface loopback 100
interface loopback100
vrf member tenant-a
ip address 172.16.10.8/32 
步驟3.配置IP地址範圍IP。這是環回的池。
步驟4.配置排除（可選，因為DHCP伺服器租用的是屬於此子網的IP地址）。
步驟5.跳過租用持續時間並點選下一步。
步驟6.選擇否，我稍後將配置這些選項。
步驟7.按一下「Finish」。
步驟8.按一下右鍵建立的作用域，然後選擇「啟用」。
為VxLAN交換矩陣配置超級作用域。
步驟1.在IPv4中按一下右鍵，然後選擇新建超級作用域。
步驟2.按一下Next。
步驟3.寫入超級作用域名稱。
步驟4.選擇屬於VxLAN交換矩陣的所有作用域。
步驟5.選擇屬於VxLAN交換矩陣的所有作用域。
步驟6.驗證所有VxLAN交換矩陣超級作用域是否到位，然後按一下Finish。
在主機範圍內配置選項82。
步驟1.按一下右鍵主機範圍內的策略（最後一個選項），然後按一下New Policy。
步驟2.寫下名稱和說明，然後點選下一步。
附註：在本示例中，建立策略是為了為VNI 101010 basedVNI Remote-ID（選項82的引數）在枝葉1中的主機選擇IP編址。
步驟3.按一下Add。在Criteria中選擇Relay Agent Information。在Operator中選擇Equals。然後選擇Agent Remote ID並鍵入值。按一下「OK」，然後「Next」。
附註：遠端ID從SVI關聯的SVI的MAC地址獲取。
提示：通過新增更多條件並選擇OR而不是AND，可以將策略應用於多個遠端ID（或VTEP）。
LEAF-1# show interface vlan 10
Vlan10 is up, line protocol is up, autostate enabled
Hardware is EtherSVI, address is 707d.b9b8.4daf <<<<
Internet Address is 10.10.10.1/24
步驟4.配置現有IP可在由ID選擇的VTEP上使用的IP編址，然後點選下一步。
附註：在此示例中，只有一個虛擬機器連線到Leaf-1，因此只需要一個IP地址。此處新增了第二個IP地址，用於連線其他主機。
步驟5.選中DCHP Standard Option下003路由器左側的框。然後寫下屬於此策略的主機的預設網關的IP地址，然後按Add。按「Next」（下一步）。
注意：您可以選擇多個選項，但是如果您不確定要輸入哪個值，則不要選擇此選項。配置不一致或錯誤可能會導致意外行為。
步驟6.檢查策略條件，然後按一下Finish。
DCHP資料包在VxLAN交換矩陣中從開始到結束的行走。
發現由HOST-1傳送
 |
LEAF-1上的發現
| 在LEAF-1上收到發現 | 發現由LEAF-1傳送 |
|
 |
提示：按兩下時，影象會放大。
脊柱上的發現
| 在SPINE上接收的發現 | 發現由SPINE傳送 |
|
|
 |
在LEAF-1-vPC上發現
| 在LEAF-1-vPC上收到發現 | 發現由LEAF-1-vPC傳送 |
 |
 |
附註：LEAF-2-vPC收到Discovert資料包，但此資料包僅用於交換。目標MAC地址屬於DHCP伺服器。
在DCHP伺服器上接收的發現
 |
由DCHP伺服器傳送的DCHP優惠
 |
LEAF-2-vPC上的DCHP優惠
| 在LEAF-2-vPC上收到的優惠 | 通過LEAF-2-vPC傳送優惠 |
 |
 |
DHCP提供vPC骨幹
| 在SPINE上接收的產品 | 優惠由SPINE傳送 |
 |
 |
LEAF-1上的DHCP提供
| 在LEAF-1上收到的優惠 | 在LEAF-1上傳送優惠 |
 |
 |
HOST-1上收到的DHCP提供
 |
請求由HOST-1傳送
 |
LEAF-1上的請求
| 在LEAF-1上收到的請求 | 由LEAF-1傳送的請求 |
 |
 |
骨幹上的請求
| 在SPINE上接收的請求 | 請求由SPINE傳送 |
 |
 |
LEAF-2-vPC上的請求
| 在LEAF-2-vPC上請求接收PCd | 請求通過vPCAF-2-vPC傳送 |
 |
 |
在DCHP伺服器上收到的請求
 |
DCHP伺服器傳送ACK
 |
LEAF-2-vPC上的ACK
| 在LEAF-2-vPC上收到的ACK | LEAF-2-vPC傳送的ACK |
 |
 |
脊柱上的ACK
| 脊柱上收到的ACK | ACK由骨幹傳送 |
 |
 |
LEAF-1上的ACK
| 在LEAF-1上收到的ACK | LEAF-1傳送的ACK |
 |
 |
主機1上的ACK
 |
相關資訊
修訂記錄
| 修訂 | 發佈日期 | 意見 |
|---|---|---|
1.0 |
29-Apr-2024
|
初始版本 |
意見