ASR 1001-X EoGRE issues

[kunli]

Hi Guys,

We have try to deploy EoGRE (Ethernet over GRE) between cisco ASR 1001-X and AP1702, but failed. The AP can tunnel the user ethernet data to ASR, but, ASR drop the tunnel packet.

Some debug logs I did not understand clear:

1. Configure tunnel mode:

ASR1001-X(config-if)#tunnel mode ethernet gre ipv4
*May 24 18:26:03.929: FIBtunnel: Tu9: cli request terminated early: yes
*May 24 18:26:03.929: Tunnel9: Couldn't get transport for overlay returning 227.0.0.0

2. Receive tunnel packets

*May 24 18:26:04.403: Tunnel: Drop, Failed to find tunnel for GRE/IPv4 packet 172.21.3.43->172.21.8.129 (tbl=0,"default" len=370, ttl=251)
*May 24 18:26:12.586: Tunnel: Drop, Failed to find tunnel for GRE/IPv4 packet 172.21.3.43->172.21.8.129 (tbl=0,"default" len=370, ttl=251)

ASR 1001-X configuration (Tunnel 9)

ip dhcp pool EoGRE-Ipv4-172.21.9
 network 172.21.9.0 255.255.255.0
 default-router 172.21.9.254
 dns-server 10.155.3.222

interface Tunnel9
 mac-address 0000.0e00.0009
 ip address 172.21.9.254 255.255.255.0
 no ip redirects
 load-interval 30
 tunnel source GigabitEthernet0/0/0.8
 tunnel mode ethernet gre ipv4
 tunnel vlan 9
 ip subscriber l2-connected
  initiator unclassified mac-address
  initiator dhcp

interface GigabitEthernet0/0/0
 no ip address
 negotiation auto
!
interface GigabitEthernet0/0/0.8
 encapsulation dot1Q 8 native
 ip address 172.21.8.129 255.255.255.128

Attach the tunnel packets received by ASR 1001 -x

Do you have any suggestion on this?

Thanks

-Kun

[Georg Pauwen]

Hello,

not sure what your AP configuration looks like, but from what you posted, it seems that you might have Simple IP and PMIP/GTP mixed up in your tunnel. Try the below (changes are in bold):

ip dhcp pool EoGRE-Ipv4-172.21.9
network 172.21.9.0 255.255.255.0
default-router 172.21.9.254
dns-server 10.155.3.222

interface Tunnel9
mac-address 0000.0e00.0009
ip address 172.21.9.254 255.255.255.0
no ip redirects
load-interval 30
tunnel source 172.21.8.129
tunnel mode ethernet gre ipv4

--> no tunnel vlan 9

ip subscriber l2-connected
initiator unclassified mac-address
initiator dhcp

interface GigabitEthernet0/0/0
no ip address
negotiation auto
!
interface GigabitEthernet0/0/0.8
encapsulation dot1Q 8
ip address 172.21.8.129 255.255.255.128

[kunli]

Hi Georg,

Thanks for your suggestion.

Now, I have draft fix the issue. The root cause is:

1. My ASR-1K license is ip-base, seems does not support this eogre feature. After got the ipadvanceservice license, it works.

2. Don't need the simple ip related configuration.

ip subscriber l2-connected
initiator unclassified mac-address
initiator dhcp

==>Need removed.

Now, I have try the ethernet over gre over ipv6, this still does not work.

[sanjay487]

Hi Kunli,

I have cisco ASR 1002x. Im trying to establish EoGRE tunnel . I have taken capture in Source interface, these are proper EoGRE packets. I have taken capture in tunnel. These should be decapsulated but they are malformed IP header packets.

I have put my setup, captures and issue in the community under 'Issue in ASR 1002-X EoGRE tunnel creation with x86 linux PC'

https://community.cisco.com/t5/network-management/issue-in-asr-1002-x-eogre-tunnel-creation-with-x86-linux-pc/m-p/3763592

You said that you doesn't had supported license. Can you help me in finding out if my router have that license. How can I know that my router is having that license.

Thank you.