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)
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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: Dec 21,2024
Private There IP public network router will not appear in the routing table .
Change the interface mode to trunk working mode
Ipv6 ospf cost 20
1
1
Rommon8>Sync (Save Parameter Configuration)
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nvRam : Startup-config startup configuration file , or user profile
Navigating Basic Cisco ASDM Features
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Encapsulation frame-relay
7. Application layer : user interface
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1. The other party did not have a no shutdown activation port
Q2: R14, next-version op-self
Assigned for this sub-specific interfaces of PVC. ??? is a PVC number .
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In the interface turned off CDP protocol ( only affects the specified interface )
HDLC:
Ip routing vol 1, LAN SWITCHING, Internet Architeche. LAN at the time
2. Storage forwarding : slow speed , to ensure the correctness of the frame being forwarded .
When the candidates who followed the exchange of TS1's MPLS *** solution, the language was too rigid. From PC104 to SW3 to R9~ all the way up to check the default route, RT,lab ccna, neighbors, R7 routing and NAT, almost no idea. There are several other institutions in the 4 points that are directly linked to the candidates.
1. In hop count of the amount of 2 supports a maximum support . 6 paths share the load (default set to 4)
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Avoidance
TCP is a connection-oriented protocol. Connection-oriented protocols provide more sophisticated flow control and error control than connectionless protocols. TCP can ensure the quality of data transmission, which is more reliable than UDP, but it is slower than UDP because of the need for additional error detection and flow control.
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