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Q311. What are the minimal configuration steps that are required to configure EIGRP HMAC-SHA2 authentication? 

A. classic router mode, interface XX, authentication mode hmac-sha-256 <password> 

B. named router mode, address-family statement, authentication mode hmac-sha-256 <password> 

C. named router mode, address-family statement, af-interface default, authentication mode hmac-sha-256 <password> 

D. named router mode, address-family statement, authentication mode hmac-sha-256 <password> 

Answer: C 

Explanation: 

The example below shows how to configure EIGRP HMAC-SHA2 on Cisco router: 

Device(config)# router eigrp name1 

Device(config-router)# address-family ipv4 autonomous-system 45000 

Device(config-router-af)# af-interface ethernet 0/0 

Device(config-router-af-interface)# authentication mode hmac-sha-256 0 password1 

Device(config-router-af-interface)# end 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-sy/ire-15-sy-book/ire-sha-256.html 

Q312. Which two statements about redistribution are true? (Choose two.) 

A. When BGP traffic is redistributed into OSPF, the metric is set to 1 unless the metric is defined. 

B. When EIGRP routes on a CE are redistributed through a PE into BGP, the Cost Community POI is set automatically. 

C. When OSPF traffic is redistributed into BGP, internal and external routes are redistributed. 

D. When BGP traffic is redistributed into OSPF, eBGP and iBGP routes are advertised. 

E. iBGP routes automatically redistribute into the IGP if the routes are in the routing table. 

F. When EIGRP traffic is redistributed into BGP, a default metric is required. 

Answer: A,B 

Q313. Which statement about OTV is true? 

A. The overlay interface becomes active only when configuration is complete and it is manually enabled. 

B. OTV data groups can operate only in PIM sparse-mode. 

C. The overlay interface becomes active immediately when it is configured. 

D. The interface facing the OTV groups must be configured with the highest MTU possible. 

Answer: A 

Explanation: 

OTV has the following configuration guidelines and limitations: 

. If the same device serves as the default gateway in a VLAN interface and the OTV edge device for the VLANs being extended, configure OTV on a device (VDC or switch) that is separate from the VLAN interfaces (SVIs). 

. When possible, we recommend that you use a separate nondefault VDC for OTV to allow for better manageability and maintenance. 

. An overlay interface will only be in an up state if the overlay interface configuration is complete and enabled (no shutdown). The join interface has to be in an up state. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/OTV/config_guide/b_Cisco_Nexus_7000_Series_NX-OS_OTV_Configuration_Guide/basic-otv.html 

Q314. Which option is a core event publisher for EEM? 

A. Timer 

B. Policy Director 

C. Applet 

D. Script 

Answer: A 

Explanation: 

EEM is a flexible, policy-driven framework that supports in-box monitoring of different components of the system with the help of software agents known as event detectors. The figure below shows the relationship between the EEM server, core event publishers (event detectors), and the event subscribers (policies). Basically, event publishers screen events and publish them when there is a match on an event specification that is provided by the event subscriber. Event detectors notify the EEM server when an event of interest occurs. The EEM policies that are configured using the Cisco command-line interface (CLI) then implement recovery on the basis of the current state of the system and the actions specified in the policy for the given event. EEM offers the ability to monitor events and take informational or corrective action when the monitored events occur or when a threshold is reached. An EEM policy is an entity that defines an event and the actions to be taken when that event occurs. There are two types of EEM policies: an applet or a script. An applet is a simple form of policy that is defined within the CLI configuration. A script is a form of policy that is written in Tool Command Language (Tcl). 

Figure 1. Embedded Event Manager Core Event Detectors 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/eem/configuration/15-mt/eem-15-mt-book/eem-overview.html 

Q315. With which ISs will an IS-IS Level 1 IS exchange routing information? 

A. Level 1 ISs 

B. Level 1 ISs in the same area 

C. Level 1 and Level 2 ISs 

D. Level 2 ISs 

Answer: B 

Explanation: 

IS-IS differs from OSPF in the way that "areas" are defined and routed between. IS-IS routers are designated as being: Level 1 (intra-area); Level 2 (inter area); or Level 1-2 (both). Level 2 routers are inter area routers that can only form relationships with other Level 2 routers. Routing information is exchanged between Level 1 routers and other Level 1 routers, and Level 2 routers only exchange information with other Level 2 routers. Level 1-2 routers exchange information with both levels and are used to connect the inter area routers with the intra area routers. 

Reference: http://en.wikipedia.org/wiki/IS-IS 

Q316. Which two statements about HSRP are true? (Choose two.) 

A. Its virtual MAC is 0000.0C07.Acxx. 

B. Its multicast virtual MAC is 0000.5E00.01xx. 

C. Its default configuration allows for pre-emption. 

D. It supports tracking. 

E. It supports unique virtual MAC addresses. 

Answer: A,D 

Explanation: 

Default HSRP Configuration 

Feature 

Default Setting 

HSRP version 

Version 1 

HSRP groups 

None configured 

Standby group number 

0 

Standby MAC address 

System assigned as: 0000.0c07.acXX, where XX is the HSRP group number 

Standby priority 

100 

Standby delay 

0 (no delay) 

Standby track interface priority 

10 

Standby hello time 

3 seconds 

Standby holdtime 

10 seconds 

. The standby track interface configuration command ties the router hot standby priority to the availability of its interfaces and is useful for tracking interfaces that are not configured for HSRP. When a tracked interface fails, the hot standby priority on the device on which tracking has been configured decreases by 10. If an interface is not tracked, its state changes do not affect the hot standby priority of the configured device. For each interface configured for hot standby, you can configure a separate list of interfaces to be tracked. 

. The standby track interface-priority interface configuration command specifies how much to decrement the hot standby priority when a tracked interface goes down. When the interface comes back up, the priority is incremented by the same amount. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/1 2-2_55_se/configuration/guide/3750xscg/swhsrp.html 

Q317. DRAG DROP 

Drag and drop the Metro Ethernet circuit on the left to the corresponding Service Type category on the right. 

Answer: 

Q318. According to RFC 4577, OSPF for BGP/MPLS IP VPNs, when must the down bit be set? 

A. when an OSPF route is distributed from the PE to the CE, for Type 3 LSAs 

B. when an OSPF route is distributed from the PE to the CE, for Type 5 LSAs 

C. when an OSPF route is distributed from the PE to the CE, for Type 3 and Type 5 LSAs 

D. when an OSPF route is distributed from the PE to the CE, for all types of LSAs 

Answer: C 

Explanation: 

If an OSPF route is advertised from a PE router into an OSPF area, the Down bit (DN) is set. Another PE router in the same area does not redistribute this route into iBGP of the MPLS VPN network if down is set. 

RFC 4577 says: 

“When a type 3 LSA is sent from a PE router to a CE router, the DN bit in the LSA Options field MUST be set. This is used to ensure that if any CE router sends this type 3 LSA to a PE router, the PE router will not redistribute it further. When a PE router needs to distribute to a CE router a route that comes from a site outside the latter’s OSPF domain, the PE router presents itself as an ASBR (Autonomous System Border Router), and distributes the route in a type 5 LSA. The DN bit [OSPF-DN] MUST be set in these LSAs to ensure that they will be ignored by any other PE routers that receive them.” 

For more information about Down bit according to RFC 4577 please read more herE. http://tools.ietf.org/html/rfc4577#section-4.2.5.1. 

Q319. Refer to the exhibit. 

Which statement about authentication on Router A is true? 

A. The router will attempt to authenticate users against TACACS+ only. 

B. The router will attempt to authenticate users against the local database only. 

C. The router will attempt to authenticate users against the local database first, and fall back to TACACS+ if the local database authentication fails. 

D. The router will authenticate users against the default database only. 

E. The router will attempt to authenticate users against TACACS+ first, and fall back to the local database if the TACACS+ authentication fails. 

Answer: E 

Q320. When you implement PfR, which IP SLA probe is used to determine the MOS? 

A. jitter 

B. latency 

C. packet loss 

D. throughput 

Answer: A