24. Network Assurance Flashcards
What is the command to repeat PING?
ping ip repeat number
What is traceroute?
Troubleshoot command to determine where traffic is failing as well as what path it takes througout the network.
What is displayed when a traceroute times out?
An Asterisk
What is the default hops/times for traceroute?
30
What does !H mean in the traceroute result?
Host unreachable
When do u use the most common use for debugging?
When there is a need to view things at a deeper level
How can you prevent a stream of debug messages?
With conditional debugging
What are the 2 options for conditional debugging?
- Based on access-list (debug ip packet)
- Based on interface (debug interface)
What is the command to turn off debugging?
undebug all
undebug interface ….
What is the SNMP?
Simple Network Management Protocol. It sends unsolicited TRAP messages to a SNMP collector or Network Management System
What are the 3 versions of SNMP?
SNMPv1
SNMPv2c
SNMPv3
Which version of SNMP uses encryption?
SNMPv3 authPriv
What type of authentication do does SNMPv1 & SNMPv2c use?
Community string
What is the defaul SNMP version when none is selected?
SNMPv1
What is the command to enable TRAPS?
snmp-server enable traps
What are the 3 types of syslog options?
- Console
- Logging buffer
- Off-box collector
What does the logging buffer do?
It stores all of the syslog messages
What is the default type for syslog messages to be sent to?
- Console
What is the default size of the logging buffer?
4096
What must be done before sending syslog messages?
Set the date/time on the device
What is Netflow?
Provides data information
What are the 2 components of Netflow?
- NetFlow Data Capture
- NetFlow Data Export
What is important to remember about NetFlow?
Statistics are stored in the memory cache. It can consume a lot of resoureces for this reason.
Where does NetFlow capture it’s data?
Ingress and egress
What NetFlow traffic type is collected ingress?
- IP to IP
- IP to MPLS
- Frame Relay terminated
- ATM terminated
What NetFlow traffic type is collected egress?
- All IP packets
- MPLS to IP
What is a flow in NetFlow?
A unidirectional traffic strams that contains a combination of:
- Source IP
- Destination IP
- Source port number
- Destination port number
- L3 protocol type
- Type of Service
- Input logical interface
What is the difference between NetFlow and NetFlow Flexible?
More flexible
What are the 3 types of SPAN?
- Local Switch Port Analyzer
- RSPAN
- ERSPAN
What is LSPA?
Local Switch Port Analyzer, captures local traffic on a switch and sends a copy of the network traffic to a local port attached
What is RSPAN?
Captures local traffic on a remote switch and sends a copy of the network traffic to the local switch through L2
What is ERSPAN?
Captures local traffic on a remote switch and sends a copy of the network traffic to the local switch through L3. Uses encapsulation
What is IP SLA?
A tool built in Cisco software that allows for continious monitoring of various aspects of the network.
What are the 8 types of probes that IP SLA can monitor?
- Delay
- Jitter
- Packet loss
- Packet sequencing
- Path
- Connectivity
- Server of website download time
- Voice quality scores
