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An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?
The CAPWAP heartbeat detection interval is typically multiplied by a predefined factor to determine the switchover time. For instance, in Huawei devices, a common default is three missed heartbeats before a switchover is triggered. With a detection interval of 20 seconds, the switchover occurs after 60 seconds (20 x 3). This ensures that transient network issues do not cause unnecessary switchovers .
In special scenarios, when advertising routes to an IBGP peer, a BGP device needs to set the next hop to its IP address to prevent blackhole routes. Which of the following commands can be run in this case?
Comprehensive and Detailed Step-by-Step
Blackhole Route Issue in BGP:
In IBGP, the next hop of a route learned from an EBGP peer is not changed by default. If an IBGP peer cannot reach the next hop, blackhole routes may occur.
To prevent this, the peer next-hop-local command is used to set the next hop to the local router's IP address.
Other Commands:
peer mpls-local-ifnet: Used in MPLS networks to set the next hop as the local interface address.
peer private-nexthop: Allows advertising private IP addresses as the next hop.
peer next-hop-invariable: Ensures the next hop is not modified during route advertisement, which is the opposite of what is required here.
HCIA-Datacom Study Guide, Chapter: BGP Next Hop Behavior
Huawei BGP Configuration Commands
On a WLAN, the HSB service sets up an HSB channel between two devices that back up each other, maintains the channel status, and backs up dat
a. Which of the following can HSB back up in real time?
Comprehensive and Detailed Step-by-Step
HSB (Hot Standby Backup) Service:
HSB is used on WLAN controllers to back up critical information in real time to a backup device, ensuring service continuity in case of failures.
Backed-Up Information:
CAPWAP Tunnel Information (A): Essential for maintaining connections between APs and controllers.
AP Entries (C): Information about connected APs is backed up.
User Data Information (D): Includes client authentication and session details.
Incorrect Option:
DHCP Address Information (B): Not part of HSB's responsibilities, as DHCP is handled separately.
HCIA-Datacom Study Guide, Chapter: WLAN Redundancy with HSB
What parameters can a DHCP6 server assign to a DHCPv6 client?
Understanding DHCPv6:
DHCPv6 (Dynamic Host Configuration Protocol for IPv6) is used to assign configuration parameters to IPv6 clients.
It supports both stateful and stateless modes:
Stateful: Assigns IPv6 addresses and other configuration parameters.
Stateless: Assigns only configuration parameters (e.g., DNS server) without providing IPv6 addresses.
Analysis of Parameters:
A . Gateway address:
False. DHCPv6 does not assign the default gateway. Instead, the default gateway is advertised by routers using Router Advertisement (RA) messages in IPv6.
B . DNS server address:
True. DHCPv6 can assign the IPv6 address of DNS servers to the client.
C . IPv6 address/prefix:
True. In stateful mode, DHCPv6 assigns IPv6 addresses and prefixes to clients.
D . SNTP server address:
True. DHCPv6 can assign the address of an SNTP (Simple Network Time Protocol) server to synchronize time on the client.
Conclusion:
The correct parameters that a DHCPv6 server can assign to a client are: B. DNS server address, C. IPv6 address/prefix, D. SNTP server address.
