ADWAN+SR66路由器在租户更换LAN侧设备后不能通信问题

1. 配置问题：
   • VLAN 配置不匹配：7506E 交换机和 SR6604 路由器连接的接口可能配置的 VLAN 信息不一致，导致 ARP 报文无法正确传输。比如交换机侧配置了特定的 VLAN，而路由器侧没有相应的 VLAN 配置或者配置错误，使得 ARP 请求和应答报文无法在正确的 VLAN 内传输，从而无法学习到 ARP 信息。
   • 接口配置参数问题：接口的双工模式、速率等配置参数可能不匹配。如果交换机和路由器的接口双工模式不一致（如一方是全双工，另一方是半双工），或者速率设置不匹配（如一方是 1000Mbps，另一方是 100Mbps），可能会导致通信异常，影响 ARP 信息的学习和交互。
   • ARP 相关功能或协议状态异常：
2. • ARP 代理功能：如果网络中存在 ARP 代理的情况，可能由于代理配置不正确或者代理设备故障，导致 7506E 交换机无法正确获取到 SR6604 路由器的 ARP 信息。例如，原本网络中存在的某些设备开启了 ARP 代理功能，但在更换交换机后，新的交换机与这些设备的 ARP 代理交互出现问题。
   • ARP 报文过滤：网络中可能存在一些安全设备或者配置，对 ARP 报文进行了过滤，导致 7506E 交换机无法接收到 SR6604 路由器发送的 ARP 报文。检查网络中是否有防火墙、入侵检测系统等设备对 ARP 报文进行了拦截或限制。
3. 网络拓扑或线路问题：
   • 物理连接问题：检查交换机和路由器之间的物理连接是否正常，包括网线是否插好、网线是否损坏等。如果物理连接存在问题，可能导致数据传输异常，影响 ARP 信息的学习。
   • 网络环路：网络中可能存在环路，导致 ARP 报文在网络中不断循环，无法正确到达目的地。可以通过查看交换机的端口状态、使用环路检测工具等方式来排查网络环路问题。

#WAN侧设备接口配置

#

<ZHCZinterface Route-Aggregation3.1

traffic-statistic enable
ip binding vpn-instance vpn-instance_BanGongWang
ip address 56.21.42.254 255.255.255.0
vlan-type dot1q vid 200
#
return

#WAN侧设备接口arp

#

<ZHCZ-R>dis arp int rou
<ZHCZ-R>dis arp int Route-Aggregation 3.1
Type: S-Static D-Dynamic O-Openflow R-Rule M-Multiport I-Invalid
IP address MAC address VLAN/VSI name Interface/Link ID Aging Type
<ZHCZ-R>
<ZHCZ-R>

#WAN侧设备接口与LAN 侧设备互联接口状态

<ZHCZ--R>dis int g 2/3/0/3
GigabitEthernet2/3/0/3
Current state: UP
Line protocol state: UP
Description: GigabitEthernet2/3/0/3 Interface
Bandwidth: 1000000 kbps
Maximum transmission unit: 1500
Allow jumbo frames to pass
Broadcast max-ratio: 100%
Multicast max-ratio: 100%
Unicast max-ratio: 100%
Internet protocol processing: Disabled
IP packet frame type: Ethernet II, hardware address: 78aa-8282-906d
IPv6 packet frame type: Ethernet II, hardware address: 78aa-8282-906d
Loopback is not set
Media type is optical fiber, port hardware type is 1000_BASE_LX_SFP
Promiscuous mode is not set
1000Mbps-speed mode, Full-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
Flow-control is not enabled
Maximum frame length:9664
Port priority: 0
Output queue - Urgent queuing: Size/Length/Discards 0/1024/0
Output queue - Protocol queuing: Size/Length/Discards 0/500/0
Output queue - FIFO queuing: Size/Length/Discards 0/1024/0
Last link flapping: 2 hours 31 minutes 17 seconds
Last clearing of counters: Never
Current system time:2024-11-02 02:17:14 beijing+08:00:00
Last time when physical state changed to up:2024-11-01 23:45:57 beijing+08:00:00
Last time when physical state changed to down:2024-10-31 02:12:54 beijing+08:00:00
Peak input rate: 1462358 bytes/sec, at 2024-06-12 14:26:20
Peak output rate: 132112 bytes/sec, at 2024-10-15 13:45:30
Last 30 second input: 0 packets/sec 86 bytes/sec 0%
Last 30 second output: 0 packets/sec 32 bytes/sec 0%
Input (total): 24857285 packets, 16412751012 bytes
23572836 unicasts, 1976 broadcasts, 1282473 multicasts, - pauses
Input (normal): 24857285 packets, 16412751012 bytes
23572836 unicasts, 1976 broadcasts, 1282473 multicasts, - pauses
Input: 0 input errors, 0 runts, 0 giants, - throttles
0 CRC, - frame, 0 overruns, - aborts
- ignored, - parity errors
Output (total): 1529154 packets, 320108958 bytes
247830 unicasts, 777 broadcasts, 1280547 multicasts, - pauses
Output (normal): 1529154 packets, 320108958 bytes
247830 unicasts, 777 broadcasts, 1280547 multicasts, - pauses
Output: 0 output errors, 0 underruns, - buffer failures
- aborts, 0 deferred, 0 collisions, 0 late collisions
0 lost carrier, - no carrier

#LAN侧设备接口学习mac

#

[O_CORE_SW_8.253]dis mac-address int g 1/2/0/28
MAC Address VLAN ID State Port/Nickname Aging
78aa-8282-906d 200 Learned GE1/2/0/28 Y
[O_CORE_SW_8.253]
[O_CORE_SW_8.253]

#LAN侧设备接口学习arp

#

[O_CORE_SW_8.253]dis arp 56.21.42.254
Type: S-Static D-Dynamic O-Openflow R-Rule M-Multiport I-Invalid
IP address MAC address VLAN/VSI Interface Aging Type
[O_CORE_SW_8.253]
[O_CORE_SW_8.253]

#LAN侧设备interface vlan配置

#

[O_CORE_SW_8.253]dis cur int vlan 200
#

interface Vlan-interface200
ip address 56.21.42.3 255.255.255.0
#
return
[O_CORE_SW_8.253]dis cur int g 1/2/0/28
#
interface GigabitEthernet1/2/0/28
port link-mode bridge
port access vlan 200
undo stp enable

#LAN侧设备接口与WAN侧设备互联接口状态

#

[O_CORE_SW_8.253]dis int g 1/2/0/28
GigabitEthernet1/2/0/28
Current state: UP
Line protocol state: UP
IP packet frame type: Ethernet II, hardware address: 74ea-c8d1-a800
Description: GigabitEthernet1/2/0/28 Interface
Bandwidth: 1000000 kbps
Loopback is not set
Media type is optical fiber, port hardware type is 1000_BASE_LX_SFP
1000Mbps-speed mode, full-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
Flow-control is not enabled
Maximum frame length: 9216
Allow jumbo frames to pass
Broadcast max-ratio: 100%
Multicast max-ratio: 100%
Unicast max-ratio: 100%
PVID: 200
MDI type: Automdix
Port link-type: Access
Tagged VLANs: None
Untagged VLANs: 200
Port priority: 0
Last link flapping: 2 hours 27 minutes 7 seconds
Last clearing of counters: Never
Current system time:2024-11-02 02:13:04 beijing+08:00:00
Last time when physical state changed to up:2024-11-01 23:45:57 beijing+08:00:00
Last time when physical state changed to down:2024-10-31 02:21:53 beijing+08:00:00
Peak input rate: 32 bytes/sec, at 2024-10-31 01:51:23
Peak output rate: 107 bytes/sec, at 2024-10-31 01:51:23
Last 300 seconds input: 0 packets/sec 15 bytes/sec 0%
Last 300 seconds output: 0 packets/sec 11 bytes/sec 0%
Input (total): 1120 packets, 191932 bytes
0 unicasts, 388 broadcasts, 732 multicasts, 0 pauses
Input (normal): 1120 packets, - bytes
0 unicasts, 388 broadcasts, 732 multicasts, 0 pauses
Input: 0 input errors, 0 runts, 0 giants, 0 throttles
0 CRC, 0 frame, - overruns, 0 aborts
- ignored, - parity errors
Output (total): 3245 packets, 369829 bytes
48 unicasts, 1846 broadcasts, 1351 multicasts, 0 pauses
Output (normal): 3245 packets, - bytes
48 unicasts, 1846 broadcasts, 1351 multicasts, 0 pauses
Output: 0 output errors, - underruns, - buffer failures
0 aborts, 0 deferred, 0 collisions, 0 late collisions
0 lost carrier, - no carrier