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data is not sent! Because the TCP send is ACK-driven, we can assume that it is the ACK that caused the array to send the data! So why is the ACK going to arrive? In the sending side repeatedly adhere to the premise of gentle pacing sent, the reason is definitely the intermediate device block the packet sequence, and then batch release, resulting in batches of packets to the receiving end, and then produce an ACK in batches, resulting in a batch trigger new data, thus repeated cycle!Specifically
I would like to introduce how to obtain the IP traffic of a Cisco router. Many people may not know how to retrieve the IP address of a Cisco router. It does not matter. After reading this article, you will certainly have a lot of GAINS, I hope this article will teach you more things. A router is a bridge of a computer network and a core device connecting to an IP
When using a cisco router as an Internet Router, cisco's IP packet filtering function is generally used to count IP traffic. The method is to add the ipaccountingoutput-packets command at each entrance of the cisco router. The cisco router automatically counts the IP traffic
Cisco switch security common traffic control and anti-DDoS problems. Recently, cisco switch security has been favored by many friends. Let's have a deep understanding of cisco switch security solutions today! Traffic control, anti-DDoS, virtual lan vlan, and access control l
There are many types of applications on the network. To ensure the good operation of the main applications, traffic control must be performed on the network. Network Traffic control methods are not exactly the same for network equipment manufacturers. In addition to the Cisco CAR's guaranteed access rate), there are also Rich-QoS of NEC and CBQ of HiPER, of cours
Recently changed jobs, the company more than 40 people share a 20M bandwidth wireless network, the router for Cisco R2911. Boss, let me make a cacti to monitor Cisco routed network card traffic. The whole days can not get the SNMP data, finally to the routing permission to find that the last operation to the routing SNMP service off, leaving the document written
computers. NetFlow: in fact, most Cisco routers support the NetFlow protocol, which can calculate bandwidth utilization. Although its configuration is the most complex, it is still the most powerful and suitable method for networks with large network communication traffic. Cisco devices that support NetFlow can track the bandwidth utilization of the network from
I will talk about two tips, one about monitoring switch port traffic and the other about store value. 1. Monitor switch port traffic Switch monitoring document in the production environment on the Internet. Therefore, it is complete, and a key knowledge is interspersed in the middle. Zabbix is still innocent .!!! In this demonstration, I used the production environment
This article describes how to control the BT traffic of a Cisco router through specific operations, and describes the specific operation methods in detail. I hope this article will help you. Network-Based Application Recognition (NBAR) indicates Network Application Recognition. NBAR is a technology that can dynamically search for protocols in Layer 4 to Layer 7. It can not only control static and simple net
Network-Based Application Recognition (NBAR) indicates Network Application Recognition. NBAR is a technology that can dynamically search for protocols in Layer 4 to Layer 7. It can not only control static and simple network application protocol TCP/UDP port numbers in general ACLs. For example, the TCP 80 used by well-known WEB applications can also control the protocols that generally cannot achieve dynamic ports in ACLs, such as H.323 and SIP used by VoIP. BitTorrent (BT) is a P2P software tha
Cisco Wireless LAN Controller TCP traffic Processing Denial of Service VulnerabilityCisco Wireless LAN Controller TCP traffic Processing Denial of Service Vulnerability Release date:Updated on:Affected Systems: Cisco Wireless LAN Controller 7.4 (1.1) Description: CVE (CAN) ID: CVE-2015-0756Cisco WLC is responsibl
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There are too many Qos information on the Cisco Router Traffic Control instance, but many of them are not practical. I have talked about a lot of theories. The following are the configurations on the routers of a subsidiary for your reference. In fact, as long as you understand the meaning of NBAR, CBWFQ, and WRED, traffic control can be configured as needed. Www
When a traffic analysis problem occurs, such as excessive traffic pressure, poor IPS analysis, and CPU overload, you can configure SNMP to trigger an alarm. When will the alarm be triggered, you need to configure the threshold value for the traffic notification on Cisco IPS, as shown in Figure 5.3: 650) this. width
Cisco L3 switch Policy Routing for network access and Traffic DistributionI. Description of the solution environment 1. There are two groups of Group1 and Group2 in the environment, respectively, to access the Internet from two different network outlets. 2. The core network is a Cisco 3560G layer-3 Switch with four VLANs. VLAN10/VLAN20 belongs to Group1 and VLAN3
Cisco 3560 switch interface traffic grabbing vbs scriptTo make it easy for you to view the traffic of the vswitch interface, the customer does not log on to the vswitch, and does not have any network management traffic statistics device. Simply write a vbs script, which is simple and usable. On error resume next dim w
templateHOST_NAME h17_2960sw1_3.251Service_description CHECK_TRAFFICE_G1/0/28Check_command check_switch_traffic!10128!200!400!500!800}Define Service{Use GENERIC-SERVICE,SRV-PNP; Inherit values from a templateHOST_NAME h18_2960sw1_3.247Service_description CHECK_TRAFFICE_G1/0/28Check_command check_switch_traffic!10128!200!400!500!800}6. Configure permissions (pending validation)[Email protected] ~]# chmod 777/var/tmp/check_traffic_10.10.3.249_10128.hist_dat_root__647. Restart the Nagios service[E
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