跨交换机同vlan ARP不通

[LubinLew]

下面这种简单的情况 跨交换机 同vlan可以ping通

下面这个跨2个交换机 就ping不通了, 左面ping右面 arp到Switch0没被广播丢弃了(仿真时看到的)


4个trunk端口设置都是一样的 trunk模式 允许 vlan 10 20 30 通过

Switch#show  interfaces GigabitEthernet 0/1 switchport 
Name: Gig0/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Operational private-vlan: none
Trunking VLANs Enabled: 10,20,30
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false

[porvy]

6666666

[Iforgetmyid]

Switch 0的两个端口呢？

[LubinLew]

引用 3 楼 Iforgetmyid 的回复:

Switch 0的两个端口呢？

都是同样的trunk设置

[xiami——]

二层通讯不涉及arp，还是查配置吧，应该是配置问题

[LubinLew]

引用 5 楼 weixin_40290083 的回复:

switch 0 的配置帖上来

=================SWITCH 0
interface GigabitEthernet0/1
 switchport trunk native vlan 99
 switchport trunk allowed vlan 10,20,30,99
 switchport mode trunk
!
interface GigabitEthernet0/2
 switchport trunk native vlan 99
 switchport trunk allowed vlan 10,20,30,99
 switchport mode trunk

=================SWITCH 1
interface FastEthernet0/1
 switchport access vlan 10
 switchport mode access
!
interface FastEthernet0/2
 switchport access vlan 20
 switchport mode access
!
interface FastEthernet0/3
 switchport access vlan 30
 switchport mode access
!
interface GigabitEthernet0/1
 switchport trunk native vlan 99
 switchport trunk allowed vlan 10,20,30,99
 switchport mode trunk

=================SWITCH 2
interface FastEthernet0/1
 switchport access vlan 10
 switchport mode access
!
interface FastEthernet0/2
 switchport access vlan 20
 switchport mode access
!
interface FastEthernet0/3
 switchport access vlan 30
 switchport mode access
!
interface GigabitEthernet0/1
 switchport trunk native vlan 99
 switchport trunk allowed vlan 10,20,30,99
 switchport mode trunk

[weixin_40290083]

switch 0 的配置帖上来

[Iforgetmyid]

ping和arp不是一回事，ping是icmp哦！ “左面ping右面 arp到Switch0没被广播丢弃了”这句话的意思不是很明白