Principle of the H3C three layer switch

Principle of the H3C three layer switch            

The following respectively to JD379A price two network circumstances inter host communication to explain the principle of the three layer switch forwarding.

Network 1 as shown in Figure 12, a communication source, destination host is connected on the same layer three switches, but they are located at differentVLAN (network). For the three layer switch, the two hosts are located within itsdirectly connected network segment, the corresponding IP their routing aredirectly connected route.

Networking 1

Figure 12 marked MAC, IP address, gateway two hosts, and the three layer switch MAC, the different configurations of VLAN three layer interface IP.When PC A launched the ICMP request to the PC B, the process is as follows:(hypothesis three layer switch may not establish any hardware forwardingtable entries)

(1) according to the above description, PC A first to check out the destination IP address 2.1.1.2 (PC B) and they are not in the same segment, so itrequests the gateway address corresponding to the 1.1.1.1 MAC ARP requests;

(2) L3_SW received PC A ARP request, check the request message was the request IP is three layer interface IP on their own, thus sending ARP responseand the three layer interface (MAC S) MAC own contained therein. At the same time it will take the corresponding IP address and MAC address of PC A(1.1.1.2<==>MAC A) relationship of records to the ARP table own to (because the ARP request message contains the sender's IP and MAC);

(3) PC A gateway (L3_SW) ARP response, assembly of the ICMP requestmessage and send the message to the MAC = MAC, S, MAC = MAC A = 1.1.1.2, IP, buy HP JD375A source destination IP = 2.1.1.2;
More information, please view: http://www.h3network.com

Questions about Cisco 2960 series switches

Questions:

1, glc-lh-smd Why I can not connect CRT to cisco 2960?

2, Is there no out port to the Cisco 2960 ACL ?

Answers:

1, Just change A USB drive to have a try.Or use PCMCIA change to COM port, it is more steady.The majority of USB to COM port is not good.

2, Yes. This is normal, because the limit of Cisco.

Normally, the PACL is no! ws-c2960s-48fps-l Because there is no need to set the direction! Because IN PORT can replace!

Does H3C S3600-SI can realize the port binding MAC address?

Does H3C S3600-SI can realize the port binding MAC address?

Yes. Here is the configuration:

2.1.1 am user-bind

[command] buy JG299A

System view:

Am user-bind mac-addr mac-address ip-addr IP-address [interface interface-type interface-number]

Undo am user-bind mac-addr mac-address ip-addr IP-address [interfaceinterface-type interface-number]

Ethernet port:

Am user-bind {mac-addr mac-address [ip-addr IP-address] | ip-addr IP-address}

Undo am user-bind {mac-addr mac-address [ip-addr IP-address] | ip-addr IP-address}

[view]

System view / Ethernet port view

[parameters]

Interface interface-type interface-number: Specifies the port binding. Theinterface-type interface-number port type and port number.

Ip-addr IP-address: Specifies the need to bind the IP address. Where IP-address denotes the binding IP address.

Mac-addr mac-address: Specifies the need to bind the MAC address. Where mac-address denotes the binding MAC address, the format for the H-H-H.

If only bound port and MAC, is arranged on the port.

Interface Ethernet1/0/1 buy HP JG300A 

Am user-bind mac-address 000f-e200-5101

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Cisco laid off 4000 people pack the equivalent of 5% employees

According to the "agency" report, buy ws-c3560x-24t-e the United States multinational suppliersCisco network equipment company (Cisco) announced a few days ago, will lay off 4000 people, the equivalent of 5% employees.

Cisco executive said, weaker than expected economic recovery, the marketdevelopment is particularly disappointing, and therefore must be cut.

Cisco CEO Chambers said, the United States market is improving, but growth in emerging markets offset "slowing down" the recovery force.

Chambers emphasizes, the company must "rapid response", re adjust the human, to meet the growing demand in some markets. He said, part of ws-c3560x-24t-l the streamlining of human will undoubtedly re employed in other positions.

Ways to slove of switch VRRP problem

1, fault phenomenon: the morning of June 5th, OSN card the entire core network failure,affect the company almost all systems.

2, temporary treatment: through the examination of the core switch log, foundthe core switches do not contact the main core switches, the virtual address toexchange main preemptive VRRP, resulting in line fault all VRRP VLAN. Forfast recovery business system, decided to temporarily shut down thepreparation of core switch

3, analysis of the phenomenon: VRRP two switches to the virtual IP address isthe broadcast storm caused by two reasons 1, heart line or port fault 2,standby switch equipment under the loop resulted from

4, find the reason:

Open equipment core switches, once again pulled out after all.

Using the serial line connected switches, run disp Inter, port Input message,found that G1/0/4 broadcast packets in particular

G1/0/4 below the floor 8 floor of the switch are respectively 192.168.1.80192.168.1.81 192.168.1.82 192.168.1.83 192.168.1.84, reset

Co inter under clear port statistics, and then run disp Inter, each port Input message view each switch, found that 192.168.1.83 twenty-second portbroadcast

Package special.

192.168.1.83 22 corresponds Huawei OSN to a switch in the conference room, found twointerface a cable received the switch on the formation of a loop.

Cisco Data Center switches: Nexus and Catalyst series switches

Nexus 7000, 1, 10, and 40 switches and ws-c2960s-48fps-l 100GB Ethernet (GbE) scalability, up to 17TBps, can be well applied to the data center, Cisco said Kiran. The new Nexus Cisco 7700 and 7000 series has a similar feature set, with 10, 40 and100 GbE ports, but provide up to 83Tbps. "We each line card increases the throughput, is almost 2.5 times before, so this is a significant improvement in performance," Kiran said cisco.

Nexus 7700 switch series is also more environmentally friendly. 3KW supportto provide electricity for energy efficiency, allocation more flexible, fan wheelswitch according to the temperature adjustment. "The exchange energy consumption reduced by 33%," Kiran said.

Energy efficient hardware to those in the lack of energy or expensive areaproviders with exceptionally attractive, ESG senior analyst Bob Laliberte said.

In the high density data center, Cisco provides the options, but limited areas,virtualization and cloud environment provides the Nexus 6000 series. Thisswitch offers 10, 40GbE scalability, and lower price, compact structure. "Unlike the large frame type switch, the 6000 is built for a specific purpose, have a fixed function, so the provider cannot like more switches that mixing and matching function," Hanselman said 451.

Although the investment protection and expansibility is very important, but many providers use the Catalyst switch in its environment. Although the market is now Cisco Catalyst main product line for the campus, but the Catalyst 6800(Catalyst switches the latest) can also be used in the data center, Hanselman.

Catalyst series can also have buy ws-c3560x-48p-s the same Cisco Nexux switches to provide similarfunctions, but the provider may have Catalyst switch to invest more, to achieve higher levels of throughput, Hanselman explained.

More information，please view: http://www.3anetwork.com

How to set the user name and password of Huawei switch

(1) the telnet only need to input password can remote access switch.

Enter the user interface view CSHD

[SwitchA]user-interface vty 04

Set authentication password authentication mode

[SwitchA-ui-vty0-4]authentication-mode password

Set the login authentication password plaintext password "huawei"

[SwitchA-ui-vty0-4]set authentication password simple Huawei

Configure user level to the highest level 3 (the default is level 1)

[SwitchA-ui-vty0-4]user privilege level 3

(2) telnet need to enter the username and password can log switch.

Enter the user interface view

[SwitchA]user-interface vty 04

To configure the local or remote user name and password authentication

[SwitchA-ui-vty0-4]authentication-mode scheme

To configure the local TELNET user, user name is "Huawei", "Huawei", the password for access to the highest level 3 (the default is level 1)

[SwitchA]local-user Huawei

[SwitchA-user-huawei]password simple Huawei

[SwitchA-user-huawei]service-type telnet Level 3

(3) through the con port input password to remote landing switch.

Enter the user interface view

[Quidway]user-interface aux 0

Set authentication password authentication mode

[Quidway-ui-aux0] authentication-mode password

Set the login authentication password plaintext password "huawei"

[Quidway-ui-aux0] set authentication password simple Huawei

Configure user level to the highest level 3 (the default is level 1)

[Quidway-ui-aux0] user privilege level 3

(4) through the con port need to enter the username and password can logswitch.

[Quidway]user-interface aux 0

To configure the local or remote user name and password authentication

[Quidway-ui-aux0] authentication-mode scheme

To configure the local TELNET user, user name is "Huawei", "Huawei", the password for access to the highest level 3 (the default is level 1) buy EF8F

[SwitchA]local-user Huawei

[SwitchA-user-huawei]password simple Huawei

[SwitchA-user-huawei]service-type telnet Level 3