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131 Cards in this Set
- Front
- Back
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Extent of local services |
Access layer only |
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Extent of remote services |
Distribution layer and access |
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Extent of Enterprise services |
Access, distribution, core |
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Switch blocks (aka access distribution block) contains.. |
Access and distribution level switches |
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Approximate max amount of users in a switch block |
2000 users |
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Define dual core deisgn |
Redundant core usually built from 2 identical switches |
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Define multinode core design |
4+ core devices, usually 2 per large building.. connected together to form a full mesh |
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Design in smaller networks where core and distribution is combined |
Collapsed core block |
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In a properly designed hierarchical network design, how a broadcast from a pc should be limited to what |
one switch block |
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What will cause traffic to be throttled at distribution level switches |
A switch block that is too large |
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Describe CAM table |
Layer 2 forwarding table, contains MAC and VLAN |
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Describe TCAM table |
Hardware process for ACL filtering and QoS classification |
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Describe FIB (forwarding information base) |
Area of hardware that contains routing table database. Part of CEF
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Default CAM table timeout |
300 seconds (5 mins) of inactivity |
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Command to change CAM table timeout to 10 minutes |
Switch(config)# mac address-table aging-time 600 |
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Command to statically define a mac address and vlan |
Switch(config)# mac address-table static 0000.1111.4444 vlan 10 interface fa1/0/1 |
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TCAM table organizes by what |
Masks, longest mask is found |
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Command to see how many addresses are in the CAM table and how many are available |
show mac address-table count
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Command to clear dynamically learned mac addresses |
clear mac address-table dynamic (address, interface, or vlan) |
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Command to show TCAM utilization |
show platform tcam utilization |
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Show command to see which SDM is being used |
show sdm prefer |
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4 SDM template type keywords
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default, access, vlan, routing
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Command to change SDM to routing |
sdm prefer routing |
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What version of VTP allows extended VLANs |
Version 3 |
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Which ports do not rapidly transition when using portfast |
trunks |
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Which SDM type disables routing in hardware |
VLAN |
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First way stackwise figures out master |
Highest priority |
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Command to set switch priority |
switch 1 priority (1-15) |
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What mode must of redundancy must a stack be using to use NSF |
SSO (stateful switchover) |
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What is the function of NSF |
non-stop forwarding in the event of a supervisor module failure |
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What spanning tree feature immediately replaces the root port with an alternate port |
uplink fast |
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What reports native VLAN mismatch |
CDP version 2 |
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What reports port-duplex mismatch |
CDP version 2 |
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How many VLANs can be used to pass user traffic with VTPv2 |
1001 |
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Default errdisable recovery interval |
300 sec |
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What extension of LLDP operates between end devices and network devices |
LLDP-MED |
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Mac address used to multicast CDP messages |
01:00:0c:cc:cc:cc |
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default CDP advertisement time |
60 secs |
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Size of VLAN tag (bytes, bits) |
4 bytes (32 bits) |
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Feature automatically enabled when a voice vlan is configured |
portfast |
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VTP version that carries native vlan |
2 and 3 |
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What VLAN can be manually pruned, but not pruned by VTP |
vlan 1 |
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In LACP, setting a port-priority ____ will send more traffic over it |
lower |
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what state does a port go in when a port configured with root guard receives a superiorBPDU? |
root-inconsistent |
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Describe a VSL |
2 identical chassis are connected with virtual switch links to form a VSS (virtual switch system) |
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What happens when a switch enters dual active recovery mode |
all interfaces disabled on formal active switch, new active switch moves into forwarding on all interfaces |
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What does DHCP option 82 do |
Allows the device to act as a DHCP relay agent |
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what authentication service is needed to configure 802.1x |
RADIUS with EAP |
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Default stackwise stack member number and priority |
1 and 1 |
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the 4 election criteria in order for stackwise |
Priority Interface level configuration Feature set (IOS) MAC (lowest) |
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How fast must a switch boot up to participate in stackwise election |
within 20 seconds of the first switch participating |
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What happens when a switch is added to an existing stackwise stack |
It gets added as a member, does not participate in master election |
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Default HSRP decrement on tracked interface |
10 |
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Default GLBP virtual MAC addresses |
4 |
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VRRP router that forwards packets |
Virtual router master |
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Which command configures an HSRP group to become a slave to another HSRP group |
standby follow |
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How many VLANS can an 802.1q trunk support |
4096 |
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Command to set the voice vlan to 9 |
switchport voice vlan 9 |
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What VTP setting must be used to allow extended VLANs |
vtp mode transparent (or V3) |
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Size of ISL header and trailer |
26 byte header 4 byte trailer |
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Default DTP negotiation for encapsulation when switches support ISL and DOT1q |
ISL |
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What command will disable DTP negotiation |
switchport nonegotiate |
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Does a lightweight AP need a trunk connection or access port |
Access port |
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What allows a lightweight access point to connect to the wireless controller and tunnel traffic to it |
CAPWAP (control and provosioning of wireless access points) |
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What are the 3 types of VTP advertisements |
Summary advertisements (every 5 mins) Subset advertisements (after a change) Advertisement requests from clients |
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What version of VTP allows per-port VTP |
version 3 |
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Command to limit VLANs that can be pruned |
switchport trunk pruning vlan (add, remove |
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Default STP forward delay |
15 sec |
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default STP max age |
20 sec |
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Command to change a spanning tree port cost to 8 |
spanning-tree cost 8 |
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What happens if spanning tree timers are mismatched
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Timers are synched with root |
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Default STP diameter |
7 |
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Command to change spanning tree port priority |
spanning-tree [vlan ___] port-priority ___ |
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Command to enable root guard |
spanning-tree guard root interface command |
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command to see ports root guard put in root-inconsistent state |
show spanning-tree inconsistentports |
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command to show what STP enhancements are being used |
sh spanning-tree summary |
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When does loop guard disable a port |
when BPDUs stop getting received |
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What does UDLD normal mode do when a unidirectional link is detected |
Allowed to continue operation and generates a syslog message |
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Default UDLD message timer |
15 seconds |
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How to get a port out of errdisabled when UDLD aggressive mode shut it down |
udld reset |
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What 2 combinations of STP enhancements are not permissible on the same port |
Root guard and loop guard Root guard and BPDU guard |
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When does RSTP consider a neighbor to be down |
3 missed BPDUs |
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How many instances of MST are supported |
16 |
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What kind of port will port-security not work on |
Any dynamic port DTP is used (can be used on access and trunk)
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How does the IST interact with a device configured for CST |
It uses instance 0 to make it appear the MST group is 1 switch and is root
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Command to set load balance method and what mode |
Global config, port-channel load-balance src-dst-port |
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What does the non-silent keyword do when added to a channel-group 1 mode auto command |
It requires each port to receive PAgP packets before adding them to a channel |
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What command can be used to become the LACP decision maker |
lacp system-priority 1 (default 32,768) |
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What can be done when more than 8 ports in an LACP etherchannel to define which ports should be used |
Specify port priority lacp port-priority 1 (default 32768) |
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Command to detect etherchannel misconfiguration and shut the interface down |
spanning-tree etherchannel guard misconfig |
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Command to view FIB |
sh ip cef |
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What must CEF know before it can forward |
Contents of routing table |
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Command to change the SDM to support IPV4 and IPV6 |
sdm prefer dual-ipv4-and-ipv6 |
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Command to keep SVI up when no L2 ports are active |
swichport autostate exclude (svi interface command) |
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What defines a FIB adjacency |
Next-hop L3 information |
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Command to tag native vlan in dot1q |
global# vlan dot1q tag native |
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VLAN ID field length inside 802.1q frame |
12 bits |
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If a switch has portfast and BPDUfilter on an interface, what happens if a BPDU is received |
It goes gets out of portfast mode, bpdu's are not filtered, and it goes into normal STP mode |
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If a switch port has only BPDUfilter on, what happens if a bpdu is received |
it is ignored |
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How does an IPv6 DHCP server exclude addresses |
IPv6 is unable to exclude |
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How can you statically bind a mac to an IP with dhcp |
ip dhcp pool mypc host 192.168.1.99 255.255.255.0 client-identifier 0100.50b6.b5 |
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Command to set a DHCP relay |
ip helper-address 192.168.199.4 |
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What NTP server is considered most secure (stratum level) |
1 |
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What does SNTP stand for |
simplified network time protocol |
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command to set logging buffer size |
logging buffered size |
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In SNMP, a network device is called a___ and the receiving application is the ___ |
agent manager |
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Command to make a DHCP relay device pass option 82 info |
ip dhcp relay information option |
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Is port security allowed on etherchannel ports |
no |
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Max # of GLBP AVFs |
4 |
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Command to enable responding to SLA requests |
ip sla responder |
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command to show ip sla config |
show ip sla config (#) |
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command to show ip sla stats |
show ip sla statistics (#) |
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Which can't be used as a SPAN source physical port, vlan, svi, int in etherchannel, port-channel |
SVI |
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Command to see active span sessions |
show monitor |
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What command on the "monitor session" forwards layer 2 proto info like STP, CDP, VTP, and PAgP? |
encapsulate replicate |
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"monitor session" command to filter a vlan |
monitor session 1 filter vlan 2 |
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how do you configure a remote span vlan |
vlan 99
remote-span monitor session 1 source remote vlan 99 |
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What type of network does stackwise create (hub/spoke, star, ring, etc) |
ring |
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What is the most basic type of redundant switch supervisor mode where the standby module must reload every other module in the switch and then initialize all the supervisor functions |
RPR (route processor redundancy) |
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What is the type of redundant switch supervisor mode that where the standby is booted and ready to roll, giving a failover time of less than 1 second |
SSO (stateful switchover) |
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command to change redundancy mode |
Switch(config)# redundancy Switch(config-red)# mode {rpr | rpr-plus | sso} |
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What feature can be used along with SSO that quickly rebuilds RIB after a supervisor failure (focuses on routing protocol)
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NSF (non-stop forwarding) |
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HSRP term for the one in charge and backup VRRP term for the one in charge and backup |
HSRP - Active, standby VRRP master, backup |
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Default timer for CDP advertisements |
60 seconds |
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Size of VLAN field in 802.1q frame |
12 bit (takes 12 bits to get to 4096) |
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VLAN range able to be pruned by VTP |
2-1001 |
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MTU required for Q-in-Q |
1504 |
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How many bytes to 802.1Q add to frames |
4 bytes |
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Port security mode that drops traffic and sends SNMP trap |
Restrict |
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Port security mode that drops traffic without sending notification |
Protect |
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Maximum switches in stackwise |
9 |
