
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
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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: Sep 16,2026
LMI: Local Management Interface .
7.Full
To understanding
6. Set when to dial the number
Display current hostname configuration
to everyone, because you don't feel it, you may have no work experience,
Management Distance : decisions routes which generate a given routing protocol will be adopted by the router . Tube lower management more likely to be taken from the router
=========================================================== ===============
4. with opposing IP protocol
5. Why do you want to encapsulate header information at each layer of the TCP/IP stack?
B(config-if)#ip nat inside
1. Agreement. The structure of the package is different
Show cdp neighbors
such ability, there is no such thing as a foothold in the IT world. At
B server:
Firewalls and Security Domains
Automatic generation of EUI-64 format (standard 64-bit)
ISL 's roads agreement in 2950 creates a Ge 802.1Q trunk roads
The connection mode of the switch: 1. Cascading - directly connected by fiber or twisted pair; 2. Redundant - can be backed up or load balanced; 3. Stacking - requires dedicated stacking lines and interfaces
First, there are brothers introduced, put the key equipment on the display, in fact, this is no way, because his putty is not cascading, so how many windows you have ordered you do not know. When all the configuration is complete,ccie lab for gns3, put the key equipment in the lower part of the display and check it in five minutes! ! Avoid being TR and don't know.
Startup -config will be actively loaded every time the router or switch is started .
Passive-interface
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