问

同一Vlan中有个别地址无法ping通网关

VLAN

2023-05-06提问

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DogeCrogi

DogeCrogi 零段

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问题描述：

目前遇到服务器无法联网的情况，经排查发现更换同vlan的IP即可恢复正常。首先怀疑是IP地址冲突，但是在核心交换机上查询arp列表发现IP对应的MAC地址就是服务器本身的MAC地址。此服务器直连核心交换机。同时无法上网的IP也无法ping通网关。临时给服务器更换IP恢复运行之后，使用笔记本电脑配置故障地址可以复现故障情况，与此同时查询核心交换机arp列表发现对应MAC也能正常更新为笔记本电脑MAC地址。目前发现的故障IP为10.11.25.240和10.11.25.196。

在服务器改IP同时测试笔记本电脑也断开与核心交换机的连接之后查询arp地址表，没有发现新的不同MAC地址，，命令为：dis arp | inc 10.11.25.240

组网及组网描述：

设备型号是S10508

version 7.1.070, Release 7557P03

Vlan配置：

interface Vlan-interface2006

ip address 10.11.6.1 255.255.255.0

ip address 10.11.25.1 255.255.255.0 sub

ip address 10.11.33.1 255.255.255.0 sub

ip address 10.14.36.1 255.255.255.0 sub

端口配置

interface GigabitEthernet1/0/8

port link-mode bridge

port access vlan 2006

interface GigabitEthernet1/0/23

port link-mode bridge

port access vlan 2006

这两个端口都测试过，情况相同。

ACL规则：

# acl number 3000

rule 5 permit ip source 10.11.26.0 0.0.0.255

rule 6 permit ip source 192.168.10.1 0

rule 7 permit ip source 121.248.220.0 0.0.0.255

acl规则主要用于限制telnet登录交换机的地址段范围，无其他限制。

最佳答案

叫我靓仔

叫我靓仔九段

粉丝：207人关注：1人

1、客户端arp -a看下能否学到正确的网关mac

2、如果第1步骤都有问题，那就看下交换机的接口状态

2 个回答

按时间按赞数

人群不知名靓崽

人群不知名靓崽三段

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dis int +接口看下是否有错包

[hexin]dis arp | inc 10.11.25.196 10.11.25.196 000c-29ea-4b4e 2006 GE1/0/35 1199 D [hexin]dis int ge1/0/35 GigabitEthernet1/0/35 Current state: UP Line protocol state: UP IP packet frame type: Ethernet II, hardware address: 5cc9-9965-1000 Description: GigabitEthernet1/0/35 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: 2006 MDI type: Automdix Port link-type: Access Tagged VLANs: None Untagged VLANs: 2006 Port priority: 0 Last link flapping: 8 weeks 4 days 22 hours 31 minutes Last clearing of counters: Never Peak input rate: 758624 bytes/sec, at 2023-04-13 15:19:46 Peak output rate: 3066120 bytes/sec, at 2023-03-28 07:00:24 Last 300 second input: 30 packets/sec 26429 bytes/sec 0% Last 300 second output: 109 packets/sec 64530 bytes/sec 0% Input (total): 211185874 packets, 159386509273 bytes 197365852 unicasts, 12125147 broadcasts, 1694875 multicasts, 0 pauses Input (normal): 211185874 packets, - bytes 197365852 unicasts, 12125147 broadcasts, 1694875 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): 806477609 packets, 475821373514 bytes 647033262 unicasts, 137543437 broadcasts, 21900910 multicasts, 0 pauses Output (normal): 806477609 packets, - bytes 647033262 unicasts, 137543437 broadcasts, 21900910 multicasts, 0 pauses Output: 0 output errors, - underruns, - buffer failures 0 aborts, 0 deferred, 0 collisions, 0 late collisions 0 lost carrier, - no carrier

DogeCrogi 发表时间：2023-05-06