• 全部
  • 经验案例
  • 典型配置
  • 技术公告
  • FAQ
  • 全部
  • 全部
产品线
搜索
取消
案例类型
发布者
是否解决
是否官方
时间
高级搜索

When S5130S-52S-EI is connected to the network, the downstream printer cannot print

2020-12-28 Published
  • 0关注
  • 0收藏,98浏览
周天 五段
粉丝:0人 关注:0人

Network Topology



Problem Description

1. There are 10 Epson printers in the store, which are connected to the network through a wired connection, and print services are issued through a PC (layer 2 on the same network segment) or wireless Ipad (layer 3 across the network segment), and the printer cannot print normally; 

2. When the printer is directly connected to the PC, the printer can print directly; 

3. When the printer and PC are connected to a HUB at the same time, they can also print directly; when the hub is connected to the network immediately, it is found that it cannot print; 

4. Another strange phenomenon, some ip addresses (10.127.46.13 and 11) cannot be printed. After changing the IP address, the printer can print; check the arp on the device side, the mac information is normal, and the device has no abnormal log printing. 

For this scenario: connect the printer and PC to the L2SW, change the printer's IP address to 10.127.46.89, and the printer can print at this time. 

In other words, the problem now is that after the switch is connected to the network, some specific addresses cannot be printed. The problem is very strange.

Process analysis

1. First, perform port mirroring and packet capture on the downstream port of L3SW connected to L2SW. Because everything is normal when the switch is not connected to the network, there should be no problem with the second layer. We first paid attention to whether there is an abnormality in the third layer network.

Capture packets successfully printed across L2:


Direct connection to successfully printed packets:


Unsuccessful packet capture when printing across L2:


After comparing the captured packets, it is found that in the captured packets that have not been successfully printed, when the TCP is disconnected, the PC sends a FIN, ACK message to the printer under normal circumstances, and the printer replies with a FIN, ACK message; but when the printing is not successful, the printer have not reply FIN,ACK packets.


2. Subsequent tests found that after the L2SW upstream interface was down, the fault disappeared. It is suspected that there are packets coming from the upstream interface affecting the printers of .11 and .13. This is verified by capturing packets on the upstream port. The 10.127.44.6 server has been sending packets to .11 and .13, and the fault disappeared after the server was isolated.


3.Because a server on the client site installed two types of printer drivers, the driver conflicts, and the client changed the security certificate of the server's default windows; as a result, a large number of TCP messages occupy the ports of a specific printer (11,13), affecting the printing business.

Solution

The server in question was powered off, a new server was enabled, the business was redeployed, conflicting drivers were avoided, the windows security certificate was not manually modified, the failure no longer recurred, and the test printing business was normal.

0 comments

No comments

Add Comments:

举报

×

侵犯我的权益 >
对根叔知了社区有害的内容 >
辱骂、歧视、挑衅等(不友善)

侵犯我的权益

×

泄露了我的隐私 >
侵犯了我企业的权益 >
抄袭了我的内容 >
诽谤我 >
辱骂、歧视、挑衅等(不友善)
骚扰我

泄露了我的隐私

×

您好,当您发现根叔知了上有泄漏您隐私的内容时,您可以向根叔知了进行举报。 请您把以下内容通过邮件发送到zhiliao@h3c.com 邮箱,我们会尽快处理。
  • 1. 您认为哪些内容泄露了您的隐私?(请在邮件中列出您举报的内容、链接地址,并给出简短的说明)
  • 2. 您是谁?(身份证明材料,可以是身份证或护照等证件)

侵犯了我企业的权益

×

您好,当您发现根叔知了上有关于您企业的造谣与诽谤、商业侵权等内容时,您可以向根叔知了进行举报。 请您把以下内容通过邮件发送到 zhiliao@h3c.com 邮箱,我们会在审核后尽快给您答复。
  • 1. 您举报的内容是什么?(请在邮件中列出您举报的内容和链接地址)
  • 2. 您是谁?(身份证明材料,可以是身份证或护照等证件)
  • 3. 是哪家企业?(营业执照,单位登记证明等证件)
  • 4. 您与该企业的关系是?(您是企业法人或被授权人,需提供企业委托授权书)
我们认为知名企业应该坦然接受公众讨论,对于答案中不准确的部分,我们欢迎您以正式或非正式身份在根叔知了上进行澄清。

抄袭了我的内容

×

原文链接或出处

诽谤我

×

您好,当您发现根叔知了上有诽谤您的内容时,您可以向根叔知了进行举报。 请您把以下内容通过邮件发送到zhiliao@h3c.com 邮箱,我们会尽快处理。
  • 1. 您举报的内容以及侵犯了您什么权益?(请在邮件中列出您举报的内容、链接地址,并给出简短的说明)
  • 2. 您是谁?(身份证明材料,可以是身份证或护照等证件)
我们认为知名企业应该坦然接受公众讨论,对于答案中不准确的部分,我们欢迎您以正式或非正式身份在根叔知了上进行澄清。

对根叔知了社区有害的内容

×

垃圾广告信息
色情、暴力、血腥等违反法律法规的内容
政治敏感
不规范转载 >
辱骂、歧视、挑衅等(不友善)
骚扰我
诱导投票

不规范转载

×

举报说明

提出建议

    +
<

亲~登录后才可以操作哦!

确定

你的邮箱还未认证,请认证邮箱或绑定手机后进行当前操作