Chapter 5: High Availability Flashcards
What are the components of High Availability?
Redundancy, Technology, People, Processes, and Tools
What things are usually made redundant for High Availability?
Devices, WAN, Data Centres, and Facilities
Network-Level Resiliency relies on monitoring using what?
NTP, SNMP, Syslog, and IP SLA.
Tuned routing protocols failover in less than _ second(s).
1
RSTP converges in about _ second(s).
1
EtherChannel can failover in approximately _ second(s).
1
HSRP timers are _ second(s) for hello and _ second(s) for hold time.
3 and 10
What service will typically failover within 3-5 seconds?
Stateful service modules
TCP/IP stacks have up to _ second(s) tolerance.
9
The Supervisor redundancy mechanism in Cisco IOS enabling supervisor switchover at which layers?
Layers 2, 3, and 4
What enables a standby RP to take control after fault on active RP?
SSO
You should use what type of STP when you have distributed VLANs on Access Switches?
RSTP
True or False: Place the Hot Standby Router Protocol (HSRP) primary and the STP primary root on the same distribution layer switch if you choose to load balance VLANs across uplinks?
True
What first hop redundancy protocol was used before default gateways were supported on IP clients
Proxy Arp
True or False: Proxy Arp is Disabled by Default
False
Which first hop redundancy protocol does not provide any secondary path?
Static Default Gateway
What is the Cisco-proprietary gateway redundancy protocol?
Hot Standby Router Protocol (HSRP)
HSRP active and standby routers send hello messages to which multicast address?
224.0.0.2 UDP port 1985.
What are the 5 states of HSRP?
Initial, Listen, Speak, Standby, Active
What is the beginning HSRP state?
Initial
If a route knows of the virtual routers IP address but is not active or standby and is waiting for Hello messages, it would be in which HSRP state?
Listening
When a route is sending hello messages, it is in which HSRP state?
Speaking
