| 1: | Type a command to determine if the spoofing is enabled in dialer interface in Cisco IOS ISDN router. |
| A1: | Router#show interfaces dialer 1 I should see on the very first line of the output: Dialer1 is up (spoofing), line protocol is up (spoofing). |
| 2: | Define the active period in snapshot routing. Is it configurable? What is its duration? |
| A2: | The active period is a time slot when the routing protocols updates can be sent over the interface. It is configurable and can be between 5 and 100 minutes. |
| 3: | In a snapshot routing configuration, use an IOS command to ensure termination of a quiet period within two minutes. |
| A3: | Router#clear snapshot quiet-time interface |
| 4: | What are the main elements of the dialer profiles in DDR? |
| A4: | The main elements of dialer profiles include dialer interfaces, dialer pools, physical interfaces and dialer map class (optional). |
| 5: | Use an IOS command to map the IP address 161.3.2.1 with the destination phone number 773-5555. |
| A5: | Router(config-if)#dialer map ip 161.3.2.1 name gateway broadcast 7735555 |
| 6: | Define the Dialer1 as a member of pool number 3 with the highest priority. |
| A6: | Router(config-if)#dialer pool-member 3 priority 255 |
| 7: | Create an ACL to deny tcp traffic on port 8008. Type the appropriate IOS command. |
| A7: | Router(config)#access-list 101 deny tcp any any eq 8008 |
| 8: | Configure the user 's IOS router for callback with 200 packets in the queue and 20 seconds drop time. Explain. |
| A8: | The correct configuration is Router(config-if)#dialer hold-queue 200 timeout 20 under the dialer interface. The dialer hold-queue 200 timeout 20 specifies that up to 100 packets can be held in a queue until the core router returns the call. If the core router does not return the call within 20 seconds plus the length of the enable timeout on the central site router, the packets are dropped. |
| 9: | In a callback configuration, type the IOS command, specifying that the core router interface will wait five seconds after disconnecting the initial call before making the return call. |
| A9: | Router(config-if)#dialer enable-timeout 5 |
| 10: | Type the IOS command to bring the second B channel up after the inbound traffic exceeds 20 percent. |
| A10: | 804-isdn (config-if)#dialer load-threshold 51 inbound |
| 11: | What "conditional" priority means in voice features configuration of ISDN? |
| A11: | Conditional means that voice call bumps data call only if the user has two data connections in the same direction; otherwise , the calling party receives a busy signal. |
| 12: | If the user's router has two data calls in progress and it is configured with Router(config)# pots dialing-method enblock, what should you expect when making a voice call to any of his LDNs? |
| A12: | Initially expect to hear a dial tone, then a busy signal, if the voice priority is not set up to "Always." |
