in different VLANs is equivalent to access between networks. It must be implemented through routing.Host access between different VLANs may be:(1) Two VLANs access two physical interfaces of the router respectively. This is the basic application of vro.(2) Two VLANs connect to a physical interface of the router through trunk, which is a single-arm route applied to sub-interfaces.(3) Use a switch with a layer-3 Switch module. Cisco 3550 and Huawei 352
3550: [ontak2010] vacationtime limit: 10 sec memory limit: 96 MB
Submit: 91 solved: 71
[Submit] [Status]
Description
With a 3N number, you need to select some numbers. First, ensure that the number of numbers selected in any range with a length of N is
Input
The first line has two integers, N and K.The second row has a 3N integer.
Output
An integer in a row indicates the answer.
Sample input5 3
14 21 9 30 11 8 1 20 29 23 17 27 7 8 35
Sample output
Header.
M-mark. Mark defined by the profile file. Allows important events such as frame boundary to be marked in the packet stream.
Payload type-Identify the RTP payload format and determine its interpretation through the application. The profile file specifies the default static ing from payload encoding to payload format. In addition, payload type encoding may be dynamically defined using non-RTP methods.
Sequence Number-each time an RTP packet is sent, the serial number increa
Linux PPP and pppoe)
Favorites
Reference: http://www.akadia.com/services/pppoe_iptables.html;
Http://en.wikipedia.org/wiki/point-to-point_protocol_over_ethernet;
Http://blog.csdn.net/absurd/archive/2007/05/04/1596496.aspx
Http://www.36ji.net/article/0859/3550.html
Http://blog.csdn.net/csucxcc/archive/2007/07/10/1684416.aspx
PPP:
PPP consists of two types of Protocols: LCP and NCP ).
LCP is used to establish, remove, and monitor PPP data links. NCP i
allow the specified source host to log on2. configuration of CatOS (such as 6500/4000 switching engine:A) software requirementsThe 6500/4000 swap engine running CatOS provides SSH services that require a 6.1 or more "K9" version of software such as: cat6000-sup2cvk9.7-4-3.bin and cat4000-k9.6-3-3a.bin.8540/8510 the above 12.1 (12c) ey software is required to support SSH for vswitches.3550 SSH support for vswitches requires software later than 12.1 (1
VLAN 2*/ Switch (Config) interfacerange Fa 0/1-8 Switch (config-if-range) switchportaccess Vlan 2 /* Add port 9-16 to VLAN 3*/ Switch (Config) interfacerange Fa 0/9-16 Switch (config-if-range) switchportaccess Vlan 3 /* Add port 17-24 to VLAN 4*/Switch (Config) interfacerange Fa 0/17-24Switch (config-if-range) Switchport Access Vlan 4Switch (Config-if-range) Exit /* After this step, each VLAN will get up */ Configuring 3550 as a DHCP server /*vlan 2
-port Gigabit Optical Module Ws-x6816-gbic, a 48-port fast switching module ws-x6548-rj-45). Trunk on the corresponding port of the 6509 and Annette Switch connected to the optical transceiver, the Annette switch is divided into two VLANs, respectively 172.25.6.0/24 (hereinafter referred to as VLAN6) and 172.25.7.0/24 (hereinafter referred to as VLAN7), The machines of the two departments are connected to their respective VLANs. The convergence layer switch (Cisco
errdisable recovery Cause Unicast-flood
errdisable recovery Cause Vmps
errdisable recovery Cause arp-inspection
errdisable recovery interval 30
Spanning-tree Extend System-id
!
!
Interface GIGABITETHERNET2/1//restricted to the user of the port access, the switch can be
ip arp inspection limit rate 100
ARP Timeout 2
IP DHCP snooping limit rate 100
!
Interface GIGABITETHERNET2/2
ip arp inspection limit rate 100
ARP Timeout 2
IP DHCP snooping limit rate 100
!
Interface GIGABITETH
; m_hSocket.Create(2330,SOCK_DGRAM); m_hSocket.SendTo( p,sizeof(yuan1),3550,"127.0.0.1");//用结构体发送。 m_x=0; m_y=0; m_r=0; m_hSocket.Close(); UpdateData(FALSE); }
There is a trick to sending data, which is to send all the data in one structure without sending it one at a time. However, you cannot include CString data types in the structure body, such as the variable length.
Second, receive the procedure
Let's take a look at the program t
population construct fitness function According to the objective function of the problem according to the good or bad of the adaptive value, the best individual is the optimal solution after several generations. Initial population Coding Method-Binary Code fitness function Genetic operations selection strategy STOP criteria Five, for example MATLAB Implementation code is as follows:
%%% A traveling businessman who wants to visit 31 provincial capitals, needs to choose
as user name and password.Category: Adobe
rtp:real-time Transport Protocol (real-time Transfer Protocol)Real-time Transfer Protocol (RTP) provides data with real-time characteristics of end-to-end delivery services, such as interactive video audio or analog data under a multicast or unicast network service. Applications typically run RTP on UDP to use their multiple node and checksum services, both of which provide the Transport layer protocol functionality. However, RTP can be used in conjunct
1, Catalyst 35500XL/2950XL stack is how to achieve?
A. Special tiered cabling is required, 1 m long or 50 cm long (cab-gs-1m or cab-gs-50cm) and a dedicated gigabit stacked card Gigastack GBIC (WS-X3550-XL) (which already contains cab-gs-50cm stacked cables).
B. There are 2 stacking methods available: Daisy Chain (providing 1G of bandwidth) or point-to-point method (2G bandwidth available).
C. 2 ways to do backups.
D. Daisy chain method can support up to 9 switch stacks, point-to-point metho
In the three-layer switching technology principle, we mentioned that the three-tier exchange (also known as multi-layer switching technology, or IP switching technology) is relative to the traditional exchange concept. As we all know, the traditional exchange technology is in the OSI Network Standard Model of the second Layer-data link layer operation, and three-tier switching technology in the network model in the third layer to achieve packet high-speed forwarding.
This article shares a more
A unit uses 3640 as the iOS DHCP Server, and the IP address of the FASTETHERNET0 port connected to the intranet is 192.168.1.4, the second-tier machine uses two 2950, the three-tier machine uses a Cisco 3550.
There are two VLANs throughout the network, for a simplified description, assuming that each VLAN has a 24-bit network address, where the IP address of the VLAN1 is 192.168.1.254,vlan2 192.168.2.254. Implement the iOS DHCP Server feature on Cisco
channel, although it can be knocked in.
The following example restricts the multicast storm level to 70.5% under F0/17
switch# Configure terminal
Switch (config) # interface FASTETHERNET0/17
Switch (config-if) # Storm-control Multicast level 70.5//Limit multicast type of package
Switch (config-if) # End
switch# Show Storm-control FASTETHERNET0/17 multicast
Interface Filter State level current
--------- ------------- ------- -------
FA0/17 Forwarding 70.5% 0%
This is a closed storm control.
swit
802.3AF supports two modes of power supply, 1236 or 4578. Supports 5 power supply levels:
0: Default 15.4W
1:4w
2:7w
3:15.4w
4: Not defined, extended use.
Cisco's previous Ethernet power was 6.3W
Cisco's previous Ethernet ┑ paragraph 跞, lt;br/>power panel uses 45, 78 power.
The inline power uses 12, 36, and needs to be combined with CDP.
Full support for 802.3AF products are as follows:
Catalyst 6000 Platform:
Ws-x6148-45af
Ws-x6148-21af
Need to add a child card: WS-F6K-FE48-AF
Ws-
Management Server comprehensive Access Management server), And make full use of the existing equipment upgrade BNU Campus Network, making the whole network Exchange performance is greatly improved while providing user management, business management and flexible billing strategy. Below we will make a brief introduction to the upgrade of the BNU campus network.
The original Campus Network overview
The original BNU Campus network main exchange equipment is a 3COM
The company has several switches need to initialize the configuration, here the process, for you to reference. This initialization process only tests the Cisco 2960 and 3550 Series switches, and the method is available. Thank you for the help in the test the little man Tang was flying.
One: Know the switch privileged password in case
If you know the privileged password for the switch, the initialization is fairly easy.
1, the switch to add electric
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