H12-891_V1.0 HCIE-Datacom V1.0 Questions and Answers

VPN routing information can be exchanged between A. CE and PE using BGP messages

When Hub-CE passes routing information with Hub-PE, you need to configure a route on Hub-PE that allows receiving AS numbers to be repeated 1 time to receive routes published by Hub-CE

Between Hub-CE and Hub-PE, and between Spoke-PE and Plan-CE, routing information can be exchanged using the OSPF protocol

An MP-IBGP peer relationship is established between Spoke-PE and THE VPN routing information is exchanged.

After the VRRP protocol master and standby role election is completed

The DHCP client receives an acknowledgment message from the server after it sends it

When a new host configured with an IP address is connected to the network

When a host connected to the switch issues a Ping message.

If RD-filter is not configured, but the RD-filter is referenced for filtering, the matching result is deny.

If RD-filter is configured, but the routed RD is not matched with any of the RDs defined in the rule, the default match result is permit.

Multiple rules are matched in the order in which they are configured.

There is always an "or" relationship between the rules configured by RD-filter.

The 6to4 automatic tunnel requires the use of a specific IP6 address segment, and the assigned address segment is preceded by 3ffe::/16

When configuring manual tunneling on the VRP platform, a Tunnel interface is generally created; When configuring automatic tunneling, a Vrua-Template interface is usually created

The ISATAP tunnel determines the destination IPV4 address of the tunnel based on the destination IP6 address.

All automatic tunnels encapsulate data in the same way.

Automatic tunneling has great advantages over manual tunneling, and manual tunneling will be phased out

BGP

Static circuit

OSPF

MPLS LDP

A virtual connection can be established in any area, after which it itself belongs to the region

The virtual connection ip is used as the link address

Virtual links can be used to solve the problem of zone 0 being segmented

The cost of a virtual connection is zero and is the optimal link

Using SSM, the receiver can use INCLUDE in IGMPv3 to indicate that the source

SSM he wishes to join is an extension of the DVMP protocol. to efficiently transmit one-to-many communication traffic

SSM requires MSDP to discover active sources in other PIM domains

Routing multicast traffic in the SSM is done by relying on the number of sources, and the RP is used for the receiver to answer the corresponding number of sources

In FTP Passive mode, the client completes the initialization of the TCP session for control and data

In FTP Active mode, the server tells the client which port it expects to send data on by commanding "PORT"

FTP always uses a TCP session to transmit control information and data information

FTP always uses TCP port 20 to establish a data session, and ICP port 21 to establish control will always use E. FTP TCP port 21 to establish a data session, TCP port 20 to establish a control session

TRUE

FALSE

TRUE

FALSE

Under the sukugan of a shared router, each OSPFv3 process runs independently

Multiple instances can be run in the same OSPFv3 under the same interface

Can support running multiple instances on a single link

OSPFv3 message header will contain instance IDFu Duan flogging

[Huawei]ospfv3 1 [Huawei-ospfv3-1J]area 1

[Huawel-ospfv3-1-area-0001]abr-summary fc00:0-0:48 cost 400

[Huawei] interface gigabitethernet 1/0/0

[Huawei-GigabitEthernet1/0/0]asbr-surmary fcO0-0:0:48 cost 20

[Huawei]ospfv3 1 [Huawei-ospfv3-1]asbr-surmary fcO0-0:0::48 3 cost 20 tag 100

[Huawei]ospfv3 1 [Huawei-ospfv3-1]abr-surmary fcO0:0:0:48 cost 400

(Huaweijospf3 1 Huawei-ospfv3-1Jarea 1

Huawei-ospfv3-1-area-0001]asbr-sumary fcO0:0:0: 48 cost 20 tag 100

The message sent by R1 to R2 is a PSNP message

R1 sends the packet of R2 as the CSNP packet. The message sent by

R1 to R2 is an LSP packet. The message sent by

R1 to R2 is the Hello message.

BGP4 can use dampening commands to suppress oscillations on IBGP routes.

Modifying the RouterID of BGP causes the BGP connection between routers to be re-established.

The Next Hop attribute in BGP4+ is represented by an IPv6 address, which can be the link-local address of the next hop.

BGP4+ does not support route auto-aggregate

Right

Wrong

TRUE

FALSE

15

10

5

1

2013:0:130F:0:0:09CO:876Answer: 130B

2013:130F::9CO:876Answer: 130B

2013:0:130F:0:0:9CO:876Answer: 130B

213::13F::9C:876Answer: 13B

2013:0:130F::9CO:876Answer: 130B

TRUE

FALSE

Alternative port, Backup port

Backup port, root port

Root port, Designated port

Backup port, Alternative port

True

False

Provides some low latency

Avoid TCP global synchronization

Avoid congestion completely

Provides a small bandwidth guarantee

Can avoid UDP occupying most of the bandwidth when congested

display ip routing-table vpn-instance vpn-instance-name

display ip routing-table

display vpn routing-table

display ip vpn-instance

True

False

In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs An EBGP neighbor relationship.

Cross-domain VPN An Option

scheme is not limited by the number of interconnection links between ASBRs

The outer layer label is exchanged between two ASBRs to VPNv4 routes.

There is no Type3 LsA flooding within Areal

There is no Type3 LSA flooding in Area2

There is Type5 LSA flooding within Areal

Area2 contains Type5 LSA generic adverb

True

False

VLANs do not support bulk creation on devices

The range of VLANs is 0 to 4096

The default reserved VLANs for Huawei devices are 4000~4010

VLANs can be extended through QinQ technology.

IP-link

BFD

NQA

Interface trace

8021D bridge only forwards BPDU packets received from the root bridge

The 8021D bridge does not forward BPDU messages

The 8021w bridge forwards only BPDU packets received from the root bridge

8021w Bridge does not forward BPDU packet

When you configure Dynamic RP , you need to configure BSR as a backup of the RP.

When you configure a static RP , you need to configure the BSR to advertise the RP information.

When configuring a static RP, you need to specify the information for the RP on all PIM routers.

When you configure Dynamic RP, you do not need to configure BSR.

8023z

8023ab

8023ad

8023af

When HW1 injects a default route into Zone 1, HW1's local route table can not contain a single default route

HW1 injects a Type 7 default route into Zone 0

HW1 injects a type 7 default route into zone 1

HW1 injects a Type 3 default route into Zone 1

When HW1 injects a default route into zone 1, HW1's local route table needs to answer the default route

Sticty MAC address

Black hole MAC address

Secure static MAC address

Secure dynamic MAC address

True

False

Improved network equipment and link utilization

It can effectively reduce network power consumption

Business disruption time is greatly reduced

Simplifies network management and reduces the complexity of network deployment planning

Filter routes received from BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peer x.X.x.x as path-filter import

The apply clause in Routepolicy

Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peerx. X.x.x as path-filter export

If-natch clause answer in Route-policy.

True

False

OSPF establishes available adjacencies through this interface

OSPF does not add routes learned from the interface to the local routing table

OSPF does not establish any neighboring relationships through this interface D. OSPF receives routing updates from neighbors

The TTL and source IP address of the packet

Source A address and the Layer 2 source address

Source IP address and specific protocol (such as FTP, HTTP, etc.)

Service type header and message length

The 0:/64 router appears in the IP routing table

2022:/64 Routers appear in the IP routing table c.2019::/64 Routers appear in the P routing table

2021:-/64 Router will appear in the P routing table

True

False

Cluster_List is an optional non-staging property for ring protection within the cluster.

The route learned from the client, all non-clients and clients published to this RR.

A network of bones is divided into multiple reflection clusters, each of which configures the other RRs as non-clients, and establishes an IBGP full connection between the RRs.

The Originator_ID attribute is generated by the Route Reflector (RR) for inter-cluster ring protection.

True

False

Digital envelopes

Issued by

Digital signature

Public key information

The Eth-Trunk interface can be avoided by frequent oscillation interfaceeth-trunkllacppreemptenablelacppreemptdelaydelay-time by following command

Source A address can be configured for load sharing in an enabled link aggregation group with the following command: interface eth-trunk 110ad-balance src-dst-ip

A member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 undo eth-trunk 1 interfaceGigabitEthernet0/0/1undoshutdown

The member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown interface GigabitEthernet0/0/1 trunkport

The mask length of the group range for the C-RP service that matches the group address that the user joined

C-RP priority

The IP address of the C. C-RP interface Number of

C-RP interface

When configuring priority, make sure that the same router acts as a master in the three VRRP backup groups

You can create multiple VRRP backup groups on one interface of a router . The router can act as a master for one VRRP backup group and as a backup for other VRRP backup groups

When you deploy load sharing, hosts in the same LAN are required to configure the IP addresses of different virtual routers as gateway addresses for missing provinces

VRRP load sharing requires at least two virtual routers to provide forwarding services at the same time

True

False

Typel

Type2

Type3

Type4E. Type5

CPU utilization is high and loops are easy to generate

Slow convergence and low CPU utilization

Fast convergence and low CPU utilization

Fast convergence and high CPU utilization

IGMPv2

BGP

OSPF

PIMV2

SG0/0/2 for WI enters the Discarding state

SW2 and G0/0/1 enters the Discarding state

SW2 G0/0/2 enters discarding state

No interface is backed up for blocking

SWI's G0/0/1 enters the Discarding state

The hello packets sent at level-1 and Leve1-2 are both 5s

The hello packets sent at level-1 are sent at 5s interval

The level-2 hello packet send interval is 5s

The CSNP packet sending interval for this interface Level-2 is 5S

Both routers are of The Level-1 type. B. Both routers remain of the default type.

One of the two routers can be of the Level-1-2 type and the other of the Leve1-1 type. D. The ISIS process numbers of the two routers must be consistent.

TRUE

FALSE

Set up via a cluster card on the motherboard

Establish

through the cluster daughter card on the interface board. Establish

through the service interface on the interface board Established by switching the cluster card on the network board

When using IPsec active-standby link redundant backups to enable the URPF function under the physical interface , it is recommended to use URPF loose mode.

When using IPsec multilink redundant backup, the URPF function can be used under the physical interface, and URPF strict mode can be used

When using IPsec multilink redundant backups, urPF can be enabled under the tunnel interface, and URPF strict mode can be used

When using lPsec active-standby link redundancy backup, the URPF function is enabled under the physical interface, and URPF strict mode can be used.

OSPF networks in non-Stub/NSSA regions

Routers in the same zone as ASBR can calculate external routes by chanting the LSA and the five types of ISAs in the region

The FA address is included in the five types of LSAs, and the FA address is 000 only as reserved for no practical purpose

Configuring the appropriate filtering policy on the ABR or ASBR can filter five types of LSAs

Type5 routes carry Layer 3 VNI.

Type5 routing carries both Layer 2 VWI and Layer 3 VNI

The IP Prefix field can carry both host and network segment addresses.

Type5 is an IP prefix route.

The A. Advertising Router report is set to as the Router ID of ASBR

Net Mask is set to all 0

Link State lD is set as the destination network segment address

Using the Link State ID and Advertising Router, you can uniquely identify an LSA

The specified port

in the forwarding state. The specified port in a non-forwarding state

Alternate port

The root port in the Blocking state

The TTL field in the label has the effect of preventing loops.

IBGP PEes generally use the Loopback interface address to establish a stable BGP neighbor relationship

BGP So0, which is used to prevent routes issued from a VPN site from passing through the MPLS backbone and back to that site. So0 is an extended group attribute that MP-BGP automatically generates.

The routing exchange between D. PE-CE can be static routing, OSPF multi-instance, IS-IS multi-instance, EBGP

Inform

Get

Response

Trap

Get Bulk

Three layers of TTL

Layer 3 destination address

Layer 3 source address

Layer 3 Transport Protocol

Two-tier TTL

Advertise to other routers on the link optional that is set in the Network LSA from which this link originates

Advertise the per-port ID of this router to other routers on the link

Advertise the link-local address

of this interface to other routers on the link Advertise this IPv6 prefix list to other routers on the link

Router HW1 strips off the label and looks for the FIB using the P destination address

Router HW1 uses LDP to create an LSP and creates a new path in LFIB for the label carried in the message

Router HW1 drops the message

Router HW1 will forward the message with the default label

You can avoid the Eth-Trunk interface from frequently shaking interface eth-trunk 1l lacp preempt enable lacp preempt delay delay-time with the following command

Source IP address load sharing, interface eth-trunk1Load-balance src-dst-ip, can be configured in an enabled link aggregation group with the following command

The member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthemeto/0/1 Shutdown nterface Gigabithemet/O/1undo eth-trunklinterface GigabitEthemet0/0/1 undo shutdown

A chain cluster that can be initiated through an order Join the member interface :interface GigabitEthemeto/0/1 shutdown interface igabitEthemetO/0/1 tunkportGigabitEthermet0/0/1 interface GigabitEthermet0/0/1 Undo shutdown

Configure the static ARP binding table

Configure the IPSG

Limits the maximum number of DHCP Snooping binding table entries that the interface allows to learn

Configuration DAI

By default, the DIS priority of broadcast network interfaces at Level-1 and Level-2 is 1 B In broadcast networks, the DIS priority for IPV4 and IPV6 can be set separately

In the same broadcast network. If each router supports both IPV4 and Pv6, the DISC of JPV4 and Pv6 must be the same device

IS-IS sient is configured under the finger port, this interface will not send ISIS packets, but will receive ISIS packet

Exclude unused IP addresses from the DHCP server

Configure the timeout period for ping packets

Configure the startup file for the DHCP server

Configure manual binding

Configure dhcp address pool

Route leaks for ISIS must be deployed on Level-1 routers

Route disclosure for ISIS is turned on by default.

Route disclosure for ISIS avoids suboptimal paths.

Route leaks for ISIS can only be applied to IPv4 environments.

The tunnel between VXLAN Layer 2 and Layer 3 gateways is an IPv4 network.

IPv6 over VXLAN solves the problem of insufficient IP address resources for end tenants.

IPv6 Over VLANs do not generate ND table entries.

IPv6 over VXLAN means that the Overlay network of the VXLAN is an IPv6 network.

Enable traffic to be forwarded locally first

Connect the stacking device via a stacking card

Configure the stacking system MAC address switching

Enables the stacking multi-master check function

OSPF introduces two types of external routes, with the first type of external route taking precedence over the second type of external route.

Use the default-route imported command in BGP only to introduce default routes that already exist in the local IP routing table.

When ISIS introduces an external route, if you do not specify the route type that is introduced, the Level-1 route is introduced by default on the L1/2 router

When ISIS introduces an external route, if you do not specify the type of route that is introduced, the Leve1-1 route is introduced by default on the L1 router .

Neither the Stub region nor the NSSA region allows injection of Type4 LSA

Type5 LSA injection is not allowed in the Stub region, while Type5LSA injection is allowed in the NSSA region

Type7LSA injection is not allowed in the Stub region, while Type7LSA injection is allowed in the NSSA region

Both the Stub region and the NSSA region allow injection of Type3 LSA

R2 does not enable OSPFv3 on the loopback port

R2 does not advertise the loopback address

R2 in area 0 to advertise the loopback into a different OSPFv3 process

R2 does not configure the Router ID used in the OSPFv3 process

Copy IPTIL value is handled in such a way that the LSR of the MPLS domain is hidden, which plays a certain security role

Can prevent wireless circular forwarding of messages

MPLS has two ways of handling TTL, one is that the IP packet copies the PTTL of the MPLS header hen it enters the MPLS network Value; Another is to set the TTL of the MPLS header to 255 at the entrance LER

When copying TTL is disabled, tracert can see the LSR of the passing MPLS domain

Advanced ACLs can be applied in route-policy to filter routes

The table entries pernit::0 Less an equal 128 indicate that all IPV6 routes are allowed through

If more than one node is defined in Route one policy, there should be at least one node in each node that matches permit

Route one policy filters only the default route

Private network tags are carried and distributed by MP-BGP when routing, and public network tags are distributed by the LDP protocol.

MPLS BGPVPN uses two layers of tags: public labels (also known as outer labels) and private network labels (also known as inner labels).

By default, the router assigns the same tag value to all VPNv4 routes destined for the peer

The egress PE uses the inner tag when determining which egress CE the message should be sent to.

SNMPv1 B. SNMPv2C

SNMPV3

All versions are available to implement

The filtering relationship between Route-Policy's noodes is "or." ", that is, as long as a node filter is passed, it can pass through the Route-policyo

For routes published locally, configure a routing policy that takes effect before the route is added to the BGP route table.

In the same node of Route-Policy, multiple if-match clauses for different attributes are "or" relationships.

When a route to a BGP peer is received, a routing policy is enforced to filter unwanted BGP routes that are not added to the local BGP routing table.

Host Information Collection

Local ARP agent

port isolation

ARP broadcast suppression

Out of the interface

MAC address

IP address

VLAN ID

basic QinQ is implemented based on the interface orientation

QinQ increases the number of VLANs to 4095*4095

Flexible QinQ can be based on different inner layerS Tag and different outer layers of Tag, for user VL The division of AN is more granular

QinQ technology enables private VLANs to pass through the public Network

Layer 2 sub-interface

NVE interface

VBDIF interface

VLANIF interface

Sends an IGMPv2 membership report to the default router unicast of the local network

Sends a unicast IGMPv2 membership report to the RP

The IGMPv2 membership report is sent over multicast in the local network, and the multicast address carried in the IGMPv2 membership report is the multicast address that you want to join

The IGMPV2 membership report is sent over multicast in the local network, and the destination multicast address of the IGMPv2 membership report is "All PIM Routers" 224002 Multicast address