Problem:Server 1 can not get ip address.
Materials:
SW3#show ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
none
DHCP snooping is operational on following VLANs:
none
Smartlog is configured on following VLANs:
none
Smartlog is operational on following VLANs:
none
DHCP snooping is configured on the following L3 Interfaces:
Insertion of option 82 is enabled
circuit-id default format: vlan-mod-port
remote-id: 0018.b9da.5300 (MAC)
Option 82 on untrusted port is not allowed
Verification of hwaddr field is enabled
Verification of giaddr field is enabled
DHCP snooping trust/rate is configured on the following Interfaces:
Interface Trusted Allow option Rate limit (pps)
-------------------- ------- ------------ ----------------
Q1:Which material is most helpful
Q2:which packets can help you find the cause
Customer just setup a IPv6 Network, with HSRPv6 on R1 & R2. After setting up, all hosts lose connection.
What would you recommend to your L1 Engineer as a Quick Fix?
CE1 key configuration
standby 1 priority 200
standby 1 preempt
ipv6 nd router-preference low
CE2 key configuration
standby 1 preempt
ipv6 nd router-preference high
I think it is a rouge device because I don't see any problems with the HSRPv6 config. PCs are configured with "ipv6 enable", "ipv6 autoconfig"
The R1 have a "ipv6 nd-preference high" and R2 have "low" if I'm not wrong.
How fast fix the problem?
¡ Shutdown the link between CE2 and PE2.
¡ Shutdown the link between CE1 and PE1.
¡ Configure CE1 with highest HSRPv6 Priority.
¡ Configure CE2 with highest HSRPv6 pirority.
¡ Configure CE2 with low HSRPv6 priority.
¡ Shutdown CE1 interface e0/0.
¡ Shutdown PE2 interface e0/0.
¡ Disable fast-switching on CE's LAN.
¡ Enable fast-switching on CE's LAN.
¡ Change HSRPv1 to HSRPv2 version
2. Topology table
EIGRP uses a wildcard mask configuration example :
students put their jobs into the post after they finished the exam. At
Ciphertext authentication
Clear line
kind of environment is needed for learning, in all fairness, all
RIPng test
PS: Like most Internet companies, the cost-first concept coincides. Perhaps my career choice is also an option for the Internet.
2. Which routes are included in the routing table of isis level1? When there are multiple level-1-2 exits, where do other routes learn from, how to choose a route?
The hub uses half-duplex mode for data transmission, and the switch uses full-duplex mode to transmit data.
TRUNK ( trunk ): use of a special mechanism to transmit multiple packaging a VLAN data .
Interface fastethernet 0/1
have been busy experimenting with experiments, but I have not absorbed
Enable trimming
Address or name of remote host ? 10.10.10.2 (The TFTP server address is the address of the PC);
Three ways for IPV6 terminals to obtain addresses:
Source port :
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Q: What drives you to pursue multiple CCIE qualifications?
a teacher answers all the questions of the students, he will harm the
R1(config)#no cdp run
(defined by the user, distinguishing different user network segments)
Fourth, summaryAttacks such as TCP Syn Flood, UDP flood, and ICMP flood may attack the target device or host by means of source address spoofing, causing severe degradation of the attacker's system performance and even system crash. URPF is a common technique used by network devices to prevent such attacks.
Lab 3-1: Configuring NAT
Frame-relay switching
Static default route: ipv6 route ::/0 serial 1/0
View the spanning tree status (3500xl)
Automatic generation of link-local unicast addresses on ports in RIPng
The process of OSPF creating neighbors :
1. feature set ACL reject absolutely london to visit ask Denver
R14#debug isdn events
3.TransParent mode of formula < clear >
Ethernet link overhead:
20. For engineering and maintenance, which one do you think is better for l3 network and l2 network?
2.AUX port ( auxiliary Management Interface ): can be linked access MODEM remote management , exclusive manner .
View the spanning tree status (3500xl)
Exit the interface
4. What are the advantages and disadvantages of UDP compared to TCP?
Disable "load rom after netboot fails"? y/n [n]: n (select no)
Packet .
Third, the advanced features of URPFStrict and loose inspections are two basic inspection mechanisms of URPF; on the basis of this, some devices further add default route inspection and ACL inspection functions, which makes the URPF inspection more flexible and comprehensive.
Lesson 2: Managing Basic Cisco ASA Adaptive Security Appliance Network Settings
TRUNK ( trunk ): use of a special mechanism to transmit multiple packaging a VLAN data .
HoldTime 180 seconds ( every two CDP information will guarantee save 180 [ seconds )
Provisions address pool empty idle IP
2.Init
ACL is the most important : The ACL condition list will have a condition of hiding " reject all " at the end .
Extended access control list : source address , destination address , protocol , port
week. I don’t think that God would let me pass. It must be that I have
whip to draw with the stick. Every
2.CHAP: Challenge-style three-way handshake , password mining with HASH transmission algorithm , than P A P stronger
examination expenses. I am very pleased to see the students busy all
Configure RIPng:
NS: Source IP 2001::1 Destination IP FF02::1:FF00:0002
ICMP (Internet Control Message protocol)
order to maximize my input and reduce the interference of other factors,
3. Safety : different of VLAN communication
RIPng test
The Real Life of an Expert: Introducing the New CCIE Security
0x0 means that router to enter into the Rom monitor mode
Lesson 4: Configuring the Cisco ASA Adaptive Security Appliance Transparent Firewall
Displays the current outside the TELNET session
real ccie value, borrow a netizen's words: "Huangsha hundred wars wear
Show ipv6 route
2, from the beginning to the end, completely listened to the SPOTO class, and completed all the homework under the class;
In the DAD function, the terminal will send the NS after obtaining the IPV6 address.
3. Router discovery: stateless automatic acquisition of address
Return directly to privileged mode
Change the cost cost of an interface .
A year later, the apprentice once again squatted in front of the martial arts master.
Lab 2-1: Preparing the Cisco ASA Adaptive Security Appliance for Network Integration
=========================================================== ===============
The VTP switch will synchronize the last configuration .
Multiple IPV6 unicast addresses are allowed on a port, and each address can participate in the OSPFv3 protocol.
1111 1110 10 54 0 EUI-64 automatically generated port ID
=========================================================== ===============
Enable password
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Exam Code: CFG: LAB1、LAB1+、LAB2、LAB2+、LAB3
TS: TS1(5 sets)、TS2(3 sets)
DIAG:DIAG 1~DIAG 8(8 sets)
Certification Provider: Cisco
Certification Exam Name:CCIE Routing and Switching Lab
Update Date: Dec 20,2024
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