On a Cisco IOS XR router, which mechanism protects the router resources by filtering and policing the packets flows that are destined to the router that is based on defined flow-type rates?
When configuring LLQ (strict priority queue) on a traffic class using the Cisco IOS XR priority command on a Cisco ASR9K router, which additional QoS command is required for this traffic class?
On the Cisco ASR9K router, when using the bandwidth command to specify the minimum guaranteed bandwidth to be allocated for a specific class of traffic, what will be used as the queuing algorithm?
Refer to the Cisco IOS XR policy-map configuration exhibit.
policy-map test ! class one priority level 1 ! class two priority level 2 ! class three bandwidth percent 60 ! interface GigabitEthernet0/0/0/2 service-policy output test !
What is wrong with the policy-map configuration?
A. missing the bandwidth command under class one and class two
B. missing the priority percent command under class one and class two
C. missing the police command under class three
D. missing the police command under class one and class two
E. missing the priority bandwidth command under class one and class two
When configuring class-based WRED on Cisco routers, which WRED parameter is not user configurable on a Cisco IOS XR but is user configurable on a Cisco IOS and IOS XE?
A. the maximum threshold
B. the minimum threshold
C. the ingress or egress direction where the class-based WRED policy will be applied
With unmanaged CE routers, at which point in the service provider network is the QoS trust boundary, and what is required at the trust boundary?
A. between the customer network and the CE router ingress and applying the required egress QoS policy on the CE router
B. between the PE and P router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
C. between the CE and PE router and mapping of the customer traffic classes into the service provider traffic classes at the PE router ingress
D. between the PE and the P router and mapping of the customer traffic classes into the service provider traffic classes at the P router ingress
E. between the CE and PE router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
On the Cisco IOS XR, when using the match protocol command within a class-map to classify traffic, you noticed that the match protocol option on the Cisco IOS XR shows much fewer protocol options than on the Cisco IOS or IOS XE, like there is no option such as the match protocol yahoo-messenger command on the Cisco IOS XR. Why is this?
A. because NBAR is not supported on the Cisco IOS XR
B. because when defining the class-map, the class-map type should be set to type inspect: class-map type inspect class-map-name command
C. because the Cisco IOS XR router does not have the correct software packages installed
D. because flexible packet matching has not been enabled on the Cisco IOS XR router
Which are typical class-based marking policies that are implemented on service provider IP NGN PE routers?
A. On the PE ingress, classify the customer traffic and then mark with qos-group. On the PE egress, classify based on the qos-group and then mark with mpls exp.
B. On the PE ingress, trust the customer QoS markings. On the PE egress, classify based on the customer QoS markings and then mark with mpls exp.
C. On the PE ingress, classify the customer traffic and then mark with mpls exp. On the PE egress, classify based on the mpls exp and then mark with qos-group.
D. On the PE ingress, trust the customer QoS markings. On the PE egress, classify based on the customer QoS markings and then mark with qos-group.
Which statement is correct regarding the default MPLS TTL behavior?
A. When an ingress edge LSR receives an IP packet, it will decrement the IP TTL field by 1; then it will copy the decremented IP TTL field into the MPLS Label TTL field.
B. When an ingress edge LSR receives an IP packet, it will copy the IP TTL field into the MPLS Label TTL field first; then it will only decrement the MPLS Label TTL field by 1.
C. When an ingress edge LSR receives an IP packet, it will decrement the IP TTL field by 1; then it will set the MPLS Label TTL field to 255.
D. When an ingress edge LSR receives an IP packet, it will copy the IP TTL field into the MPLS Label TTL field first; then it will only decrement the IP TTL field by 1.
E. When an ingress edge LSR receives an IP packet, it will just copy the IP TTL field into the MPLS Label TTL field.
Which three statements are correct regarding ping mpls command operations?
A. They are used to test for a broken LSP.
B. They use a 127/8 address as the destination address in the MPLS echo request packet.
C. They use ICMP echo request and ICMP echo reply packets.
D. If there is a broken LSP, instead of using label switching, the packet can still be forwarded based on the destination IP address in the mpls ping echo request packet.
E. MPLS OAM has to be enabled on the router using the mpls oam command.
You are tasked to enable LDP on many of the interfaces on the Cisco CRS-3 router, and because there are many interfaces that need to have LDP enabled, you mistakenly did not enable LDP on all the required interfaces. To prevent this issue from happening again in the future, what could you do the next time you need to enable LDP on many interfaces?
A. use the interface all command under the MPLS LDP process
B. use the mpls ldp sync command under the IGP routing precess
C. use the discovery command under the MPLS LDP process
D. use the mpls ldp auto-config command under the IGP routing process
Which three statements are correct regarding a Cisco MPLS TE?
A. CBR takes into account link resource and traffic tunnel attributes.
B. A Cisco MPLS TE tunnel maps onto an LSP path.
C. RSVP is used between customer routers.
D. A tunnel that is created with a priority of 0 can pre-empt an existing tunnel with a priority of 7.
E. Packets that are mapped into a Cisco MPLS TE tunnel will have two labels, with the top label indicating what the tail-end router should do with the packet.
When using the tunnel mpls traffic-eng path-option 1 explicit name test command in Cisco MPLS TE tunnel configurations, the test explicit-path configuration will consist of a list of which values?
Cisco MPLS TE resource attributes that are configured locally for each link are distributed to the headend router of the traffic engineering tunnel using which protocol?
Which affinity and mask value will match the link affinity that has 0x0F in the first 8 bits and 0x01 in the last 8 bits, and the middle 16 bits can be any value?