Infrastructure Flashcards by Sam Thomas

OSPF Maximum Number of load balanced paths

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OSPF Default number of load balanced paths

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Is an ARP table in the data plane?

No - it is in the control plane

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What plane is the FIB and Adjacency Table in?

Data plane

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In RSTP what RSTP states are referred to as “Blocking”

Blocking
Disabled
Listening

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What additional information would be needed to capture data?

Goto individual interface and enter ip flow ingress or ip flow egress

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In VTP Pruning can VLAN 1 be pruned?

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WHat is VTP Pruning

Using CDP the device knows what VLAN’s are allowed on the neighbouring interface and then stops VLAN broadcasting to that device

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What is the benefit of VTP Pruning

Reduces unnecessary broadcasts

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What method enables improved (Detailed) IP SLA info?

COnfigure ip sla responder on destionation router

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What command is used to configure Port-ACL’s

ip access-group

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What EIGRP K values are enabled by default?

K1 and K3

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EIGRP formula

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EIGRP classic v wide

32-bit v 64 bit

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EIGRP WIde formula

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Command to enable BPDU Guard on all PortFast ports?

spanning-tree portfast bpduguard defualt

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If a port in an PortChannel is made so it is not compatible with another port, what happens?

Port is Suspended

Port is disabled

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Does HSRP support millisecond timers?

Yes

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HSRP requires layer _ connectivity between routers.

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HSRP states

Initial
Listen
Speak
Standby
Active

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HSRP - Initial

HSRP doesn’t run. This state is seen when an interface comes up

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HSRP - Listen

listens for hellos, knows the virtual IP

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HSRP - Speak

sends hellos and participates in the election

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HSRP - Standby

candidate for next active router

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HSRP - Active

currently forwards packets sent to the virtual IP

It’s important that the HSRP Active router is also the _________ in order to avoid suboptimal path

spanning tree root

Command to set HSRP timers in milliseconds

DSW1(config-if)#standby 1 timers msec 200 msec 600

With the command: standby track What happens?

If interface goes down, HSRP group priority is decreased by 50

HSRP preempt delay time - which should this be timed to?

The preempt delay has been kept at 60 but Cisco recommends timing the switch boot time and setting the delay value accordingly.

In HSRP, if a router is not an Active ro Standby router - what state are they in?

Listen

HSRP - how many routers can be in the active and standby state?

1 - one for each state

Way to remember HSRP states

I shall Learn Standby Systems Anxiously

HSRPv1 port number

1985

HSRPv1 group address

0000.0c07.acXX (XX = group number)

HSRPv2 group address

0000.0c9f.fxxx (XXX = group number)

HSRPv2 port number

1985

HSRP for IPv6 (HSRPv2) port number

2029

HSRP for IPv6 Link Local address

FF02::66

Where are these mac addresses sued

MAC 0005.73A0.000 – 0005.73A0.0FFF (4096 addresses)

HSRP for IPv6 MAC address

MAC 0005.73A0.000 – 0005.73A0.0FFF (4096 addresses)

Do Router and network LSA's carry IP information in OPSFv3?

No - just express topology

Role of OSPFv3 Type 8 LSA

Link LSA contain information just about the link-local IPv6 prefixes

Role of OSPFv3 Type 9 LSA

Intra-area-prefix LSA Carry address information Essentially the prefix info previously carried in Router/Network LSA is now split into a type 9

What was OSPFv2 Summary LSA and ASBR SUmmary LSA renamed t

Type 3 - Interarea-prefix SLA's Type 4 - Interarea-router LSA's

CEF - what are the two available types of balancing?

Per Destination Per-Packet

CEF - what are the types of algorithm avaliable?

* Original * Universal * Tunnel * Include Ports

CEF default algorithm

Universal

CEF command to configure balancing type

ip load-sharing per-destination OR ip load-sharing per-destination

CEF command to configure algorithm type

ip cef load-sharing algorithm

CEF - Per-destination v Per-Packet advantages and diadvantages

* Per-Packet less affected by lots of similar src-dest flows * Per-Packet can deliver packets in the wrong order

In OSPF what is elected first - the BDR or the DR

BDR

What protocol number is used for GRE

What is TCP's default segment size

536

User Level 0 privilages

Is Telnet avalaible to Level 1 users?

Yes

When would you see the following STP error message?

ACL numbers requried for MAC ACL

700-799

What direction can MAC ACL's be applied

Inwards only

ACL numbers required for Internetwork packet exchange

800-899

Syslog Port Number

514

Type 5 Password Type

MD5

Type 7 Password Type

Vigenere

Type 4 Password Type

SHA-256

Type 8 Password Type

PBKDF2 with SHA-256

Type 9 Password Type

scrypt

GRE Protocol Number

UDP Protocol Number

ICMP Protocol Number

Local Preference - higher or lower preferred?

Higher

Local Preference default value

100

Infrastructure Flashcards

(71 cards)