interface Virtual-Template1 description Int-Vi1 VpdnG1 mtu 1501 ip unnumbered GigabitEthernetX/X/X ip mtu 1460 ip tcp adjust-mss 1400 no peer default ip address ppp max-terminate 255 ppp max-configure 255 ppp max-failure 255 ppp max-bad-auth 10 ppp authentication pap chap ppp_authent2 ppp multilink
Since here, all is OK, but the problem is that the ASR cannot reach connected users and evidently the user doesn't have internet connectivity because he cannot reach the gateway IP (ASR IP).
After read some information in internet and cisco web and test several IOS images and configurations I have activated 2 of 3 (marked in bold down) possible licenses that are available to test in the router (these are available during 60 days).
SLASR1-IPB Cisco ASR 1000 IP BASE License
SLASR1-AIS Cisco ASR 1000 Advanced IP Services License
SLASR1-AES Cisco ASR 1000 Advanced Enterprise Services License
***Result-> After apply Advanced IP Service or Advanced Enterprise license the ASR works perfectly, forwarding the traffic to the end users. The router can reach gateway and have internet connection.
I would like to try IP BASE License but there is no possibility to activate the test period in the router, I don't know if you knows any way to test it. This is the details that router shows about this 3 license types:
Index 1 Feature: adventerprise Period left: 8 weeks 1 day Period Used: 2 days 12 hours License Type: EvalRightToUse License State: Active, In Use License Count: Non-Counted License Priority: Low Index 2 Feature: advipservices Period left: Not Activated Period Used: 0 minute 0 second License Type: EvalRightToUse License State: Active, Not in Use, EULA not accepted License Count: Non-Counted License Priority: None Index 3 Feature: ipbase
-->There is no more info about IP base license<---
If I use the command "license boot level" I can apply the IP base license, but after reload the router, nothing happens.
ASR1001(config)#license boot level ? adventerprise Advanced Enterprise License Level advipservices Advanced IP Services License Level ipbase IP Base License Level
Then my answers are:
1) Is 100% necessary to have a license in ASR1001 to use the router as LNS as showed? Apparently after my tests I will answer "yes", but I'm not sure if my configuration is the only one that I can configure. Maybe exist another way to config the required scenario and avoid the purchase license.
2) Do you know if IP Base license will active the forwarding packet function in the ASR? I think yes, but before buy this license I need to be sure. As you know Ip Base is the most cheap license.
Documentation states that licensing on the ASR 1000 are now honor-based since 3.7s. I didn't test it though.
Basically, your license marked now as "EvalRTU" will be moved to an "RTU" license, indicating you would need to buy a license to keep your honor intact, but no disruption in features or connectivity will happen.
Since your test was more than 60 days ago, can you confirm this behavior with 3.12 ?
- All Cisco ASR 1000 feature and performance upgrade licenses are honor-based; that is, they are not enforced through a PAK (Product Activation Key). Note: Prior to Cisco IOS XE Software Release 3.7S, performance upgrade licenses that are required to upgrade the Cisco ASR 1001 from 2.5 to 5 Gbps or the Cisco ASR 1002-X from 5 to 10 to 20 to 36 Gbps are enforced through a PAK. Similarly, prior to Cisco IOS XE Software Release 3.6S, technology package licenses are enforced through a PAK. 
- When the 60-Day Evaluation Period expires, the license automatically changes to an RTU license. As with all other RTU licenses, there is no functionality disruption or accessibility concerns following this transition. 
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