Spot The Issues: Review Questions

1. 

Why is a commit error returned for the following interface configuration?

[edit interfaces so-0/2/0] lab@r3# show no-keepalives; encapsulation frame-relay; transmit-bucket {    overflow discard;    rate 10;    threshold 100;  }  unit 0 {    multipoint;    family inet {       address 10.1.0.3/24 {          multipoint-destination 10.1.0.4 dlci 400;      }    }  }

payload scrambling cannot work in conjunction with leaky bucket rate limiting. because pay- load scrambling is enabled by default, this configuration requires the setting of no-payload- scrambler under sonet-options .

2. 

What is needed in the following configuration to ensure that the aggregated interface can always provide at least 270Mbps of bandwidth (assuming you are bundling OC-3c links)?

[edit interfaces as0] lab@r4# show aggregated-sonet-options {    link-speed oc3;  }  unit 0 {    family inet {      address 10.0.2.10/30;    }  }

you need to include a minimum links setting of at least 2. by default, an aggregated interfacerequires only one bundle member to be declared operational.

3. 

What commands are needed to enable ILMI on an ATM interface?

you must enable ilmi under atm-options , and you must configure support for the associatedvp/vci by defining vp 0 as supporting at least 17 vcis.

4. 

You have two routers on a point-to-point link with /32 address assignments that cause the routers to be on different logical IP subnets. What configuration option is needed for proper routing across this link?

the destination keyword is required to explicitly define the neighbor address that is reachableover the p-t-p link.

5. 

How is remote IP address-to-local VC identifier mapping performed on a Juniper Networks router?

the lack of complete support for inverse arp requires that the operator perform static mappingsusing the multipoint-destination keyword. the router can be configured to respond toinverse arp request to eliminate the need for similar static mappings on the remote device,assuming it has full inverse arp support.

6. 

What change is required to make the following VRRP configuration valid?

[edit] lab@r1# show interfaces fe-0/3/0 vlan-tagging; unit 0 {    vlan-id 150;    family inet {       address 10.0.5.1/24 {          vrrp-group 1 {            virtual-address 10.0.5.200;            authentication-type simple;            authentication-key "$9$dVw2a5T3nCu"; # SECRET-DATA            track {              interface so-0/0/0.0 priority-cost 30;            }          }       }   }  } lab@r3# show interfaces so-0/0/0 hold-time up 30 down 30; encapsulation frame-relay; lmi {    n392dte 2;    n393dte 3;    t391dte 15;    lmi-type itu;  }  unit 100 {    dlci 100;    family inet {      address 10.0.2.5/30;    }  }

the problem lies in the tracked interface s logical unit value of 0, which is nonexistent on theinterface that is being tracked. for proper operation, you must track interface so-0/0/0.100.

Answers

1. 

Payload scrambling cannot work in conjunction with leaky bucket rate limiting. Because pay- load scrambling is enabled by default, this configuration requires the setting of no-payload- scrambler under sonet-options.

2. 

You need to include a minimum links setting of at least 2. By default, an aggregated interface requires only one bundle member to be declared operational.

3. 

You must enable ILMI under atm-options, and you must configure support for the associated VP/VCI by defining VP 0 as supporting at least 17 VCIs.

4. 

The destination keyword is required to explicitly define the neighbor address that is reachable over the p-t-p link.

5. 

The lack of complete support for inverse ARP requires that the operator perform static mappings using the multipoint-destination keyword. The router can be configured to respond to inverse ARP request to eliminate the need for similar static mappings on the remote device, assuming it has full inverse ARP support.

6. 

The problem lies in the tracked interface's logical unit value of 0, which is nonexistent on the interface that is being tracked. For proper operation, you must track interface so-0/0/0.100.




JNCIP. Juniper Networks Certified Internet Professional Study Guide Exam CERT-JNCIP-M
JNCIP: Juniper Networks Certified Internet Professional Study Guide
ISBN: 0782140734
EAN: 2147483647
Year: 2003
Pages: 132

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