Ethernet over GRE Tunnels

Introduction to EoGRE

Ethernet over GRE (EoGRE) is an aggregation solution for grouping Wi-Fi traffic from hotspots. This solution enables customer premises equipment (CPE) devices to bridge the Ethernet traffic coming from an end-host, and encapsulate the traffic in Ethernet packets over an IP Generic Routing Encapsulation (GRE) tunnel. When the IP GRE tunnels are terminated on a service provider's broadband network gateway, the end-host traffic is forwarded and subscriber sessions are initiated.

Client IPv6

EoGRE for WLAN

To enable EoGRE for a WLAN, the wireless policy profile should be mapped to a tunnel profile, which may contain the following:

  • AAA override: Allows you to bypass rule filtering for a client.

  • Gateway RADIUS proxy: Allows forwarding of AAA requests to tunnel gateways.

  • Tunnel rules: Defines the domain to use for each realm. They also define VLAN tagging for the client traffic towards tunnel gateways.

  • DHCP option 82: Provides a set of predefined fields.

EoGRE Deployment with Multiple Tunnel Gateways

The embedded wireless controller sends keepalive pings to the primary and secondary tunnel gateways and keeps track of the missed pings. When a certain threshold level is reached for the missed pings, switchover is performed and the secondary tunnel is marked as active. This switchover deauthenticates all the clients to enable them to rejoin the access points (APs). When the primary tunnel come back online, all the client traffic are reverted to the primary tunnel. However, this behavior depends on the type of redundancy.

Load Balancing in EtherChannels

Load balancing of tunneled traffic over Etherchannels works by hashing the source or destination IP addresses or mac addresses of the tunnel endpoint pair. Because the number of tunnels is very limited when compared to clients (each tunnel carries traffic for many clients), the spreading effect of hashing is highly reduced and optimal utilization of Etherchannel links can be hard to achieve.

Using the EoGRE configuration model, you can use the tunnel source option of each tunnel interface to adjust the load-balancing parameters and spread tunnels across multiple links.

You can use different source interfaces on each tunnel for load balancing based on the source or destination IP address. For that choose the source interface IP address in such a way that traffic flows take different links for each src-dest IP pair. The following is an example with four ports: 

Client traffic on Tunnel1 – Src IP: 40.143.0.72  Dest IP: 40.253.0.2
Client traffic on Tunnel2 – Src IP: 40.146.0.94  Dest IP: 40.253.0.6
Client traffic on Tunnel3 – Src IP: 40.147.0.74  Dest IP: 40.253.0.10

Use the show platform software port-channel link-select interface port-channel 4 ipv4 src_ip dest_ip command to determine the link that a particular flow will take.

EoGRE Configuration Overview

The EoGRE solution can be deployed in two different ways:

  • Central-Switching: EoGRE tunnels connect the embedded wireless controller to the tunnel gateways.

  • Flex or Local-Switching: EoGRE tunnels are initiated on the APs and terminated on the tunnel gateways.

To configure EoGRE, perform the following tasks:

  1. Create a set of tunnel gateways.

  2. Create a set of tunnel domains.

  3. Create a tunnel profile with rules that define how to match clients to domains.

  4. Create a policy profile and attach the tunnel profile to it.

  5. Map the policy profile to WLANs using policy tags.


Note

The EoGRE tunnel fallback to the secondary tunnel is triggered after the max-skip-count ping fails in the last measurement window. Based on the starting and ending instance of the measurement window, the fall-back may take more time than the duration that is configured.

Table 1. EoGRE Authentication Methods

Method Name

First Supported Release

Mode

PSK

17.2.1

Local/Flex (central authentication)

Open

16.12.1

Local/Flex (central authentication)

LWA

16.12.1

Local/Flex (central authentication)

Dot1x

16.12.1

Local/Flex (central authentication)

CWA

16.12.1

Local/Flex (central authentication)

Create a Tunnel Gateway


Note

In the Cisco Embedded Wireless Controller on Catalyst Access Points, a tunnel gateway is modeled as a tunnel interface.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

interface tunnel tunnel_number

Example:

Device(config)# interface tunnel 21

Configures a tunnel interface and enters interface configuration mode.

Step 3

tunnel source source_intf

Example:

Device(config-if)# tunnel source 22

Sets the source address of the tunnel interface. The source interface can be VLAN, Gigabit Ethernet or loopback.

Step 4

tunnel destination tunnel-address

Example:

Device(config-if)# tunnel destination 10.11.12.13

Sets the destination address of the tunnel.

Step 5

tunnel mode ethernet gre { ipv4 | ipv6} p2p

Example:

Device(config-if)# tunnel mode ethernet gre ipv4 p2p

Sets the encapsulation mode of the tunnel to Ethernet over GRE IPv4 or Ethernet over GRE IPv6.

Configuring a Tunnel Domain


Note

Tunnel domains are a redundancy grouping of tunnels. The following configuration procedure specifies a primary and a secondary tunnel, along with a redundancy model.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

tunnel eogre domain domain

Example:

Device(config)# tunnel eogre domain dom1

Configures EoGRE redundancy domain.

Step 3

primary tunnel primary-tunnel_intf

Example:

Device(config-eogre-domain)# primary tunnel 21

Configures the primary tunnel.

Step 4

secondary tunnel secondary-tunnel_intf

Example:

Device(config-eogre-domain)# secondary tunnel 22

Configures the secondary tunnel.

Step 5

redundancy revertive

Example:

Device(config-eogre-domain)# redundancy revertive

Sets the redundancy model as revertive.

When redundancy is set to revertive and the primary tunnel goes down, a switchover to secondary tunnel is performed. When the primary tunnel comes back up, a switchover to the primary tunnel is performed, because the primary tunnel has priority over the secondary tunnel.

When redundancy is not set to revertive, tunnels will have the same priority, and a switchover to the primary tunnel is not performed if the active tunnel is the secondary tunnel and the primary tunnel comes back up.

Configuring EoGRE Global Parameters

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

tunnel eogre heartbeat interval interval-value

Example:

Device(config)# tunnel eogre heartbeat interval 600

Sets EoGRE tunnel heartbeat periodic interval.

Step 3

tunnel eogre heartbeat max-skip-count skip-count

Example:

Device(config)# tunnel eogre heartbeat max-skip-count 7

Sets the maximum number of tolerable dropped heartbeats.

After reaching the maximum number of heartbeats that can be dropped, the tunnel is declared as down and a switchover is performed.

Step 4

tunnel eogre source loopback tunnel_source

Example:

Device(config)# tunnel eogre source loopback 12

Sets the tunnel EoGRE source interface.

Step 5

tunnel eogre interface tunnel tunnel-intf aaa proxy key key key-name

Example:

Device(config)# tunnel eogre interface tunnel 21 aaa proxy key 0 mykey

(Optional) Configures AAA proxy RADIUS key for the AAA proxy setup.

Note

 

When the tunnel gateway is behaving as the AAA proxy server, only this step is required for the configuration.

Configuring a Tunnel Profile

Before you begin

Ensure that you define the destination VLAN on the controller. If you do not define the VLAN, clients will not be able to connect.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

wireless profile policy profile-policy-name

Example:

Device(config)# wireless profile policy eogre_policy

Configures a WLAN policy profile.

Step 3

tunnel-profile tunnel-profile-name

Example:

Device(config-wireless-policy)# tunnel-profile tunnel1

Creates a tunnel profile.

Step 4

exit

Example:

Device(config-wireless-policy)# exit

Returns to global configuration mode.

Step 5

wireless profile tunnel tunnel-profile-name

Example:

Device(config)# wireless profile tunnel wl-tunnel-1

Configures a wireless tunnel profile.

Step 6

dhcp-opt82 enable

Example:

Device(config-tunnel-profile)# dhcp-opt82 enable

Activates DHCP Option 82 for the tunneled clients.

Step 7

dhcp-opt82 remote-id remote-id

Example:

Device(config-tunnel-profile)# dhcp-opt82 remote-id vlan

Configures Remote ID options.

Choose from the comma-separated list of options such as ap-mac, ap-ethmac, ap-name, ap-group-name, flex-group-name, ap-location, vlan, ssid-name, ssid-type, and client-mac.

Step 8

aaa-override

Example:

Device(config-tunnel-profile)# aaa-override

Enables AAA policy override.

Step 9

gateway-radius-proxy

Example:

Device(config-tunnel-profile)# gateway-radius-proxy

Enables the gateway RADIUS proxy.

Step 10

gateway-accounting-radius-proxy

Example:

Device(config-tunnel-profile)# gateway-accounting-radius-proxy

Enables the gateway accounting RADIUS proxy.

Step 11

rule priority realm-filter realm domain domain-name vlan vlan-id

Example:

Device(config-tunnel-profile)# rule 12 realm-filter realm domain dom1 vlan 5

Creates a rule to choose a domain, using the realm filter, for client Network Access Identifier (NAI), tunneling domain name, and destination VLAN.

Associating WLAN to a Wireless Policy Profile

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

wireless tag policy policy-tag-name

Example:

Device(config)# wireless tag policy eogre_tag

Configures a policy tag and enters policy tag configuration mode.

Step 3

wlan wlan-name policy profile-policy-name

Example:

Device(config-policy-tag)# wlan eogre_open_eogre policy eogre_policy

Maps an EoGRE policy profile to a WLAN profile.

Step 4

end

Example:

Device(config-policy-tag)# end

Saves the configuration, exits configuration mode, and returns to privileged EXEC mode.

Attaching a Policy Tag and a Site Tag to an AP

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

ap mac-address

Example:

Device(config)# ap 80E8.6FD4.0BB0

Configures an AP and enters AP profile configuration mode.

Step 3

policy-tag policy-tag-name

Example:

Device(config-ap-tag)# policy-tag eogre_tag

Maps the EoGRE policy tag to the AP.

Step 4

site-tag site-tag-name

Example:

Device(config-ap-tag)# site-tag sp-flex-site

Maps a site tag to the AP.

Step 5

end

Example:

Device(config-ap-tag)# end

Saves the configuration, exits configuration mode, and returns to privileged EXEC mode.

Verifying the EoGRE Tunnel Configuration

The show tunnel eogre command displays the EoGRE clients, domains, gateways, global-configuration, and manager information in the local mode.

To display the EoGRE domain summary in the local mode, use the following command:

Device# show tunnel eogre domain summary 

Domain Name         Primary GW   Secondary GW      Active GW      Redundancy
-------------------------------------------------------------------------------
domain1             Tunnel1      Tunnel2           Tunnel1        Non-Revertive
eogre_domain        Tunnel1      Tunnel2           Tunnel1        Non-Revertive

To display the details of an EoGRE domain in the local mode, use the following command:

Device# show tunnel eogre domain detailed domain-name 

Domain Name    : eogre_domain
 Primary GW    : Tunnel1
 Secondary GW  : Tunnel2
 Active GW     : Tunnel1
 Redundancy    : Non-Revertive

To view the EoGRE tunnel gateway summary and statistics in the local mode, use the following command:

Device# show tunnel eogre gateway summary 

Name               Type  Address                                  AdminState  State  Clients
---------------------------------------------------------------------------------------------
Tunnel1            IPv4  9.51.1.11                                Up          Up     0       
Tunnel2            IPv4  9.51.1.12                                Up          Down   0       
Tunnel10           IPv6  fd09:9:8:21::90                          Down        Down   0       
Tunnel11           IPv4  9.51.1.11                                Up          Up     0       
Tunnel12           IPv6  fd09:9:8:21::90                          Up          Down   0       
Tunnel100          IPv4  9.51.1.100                               Up          Down   0

To view the details of an EoGRE tunnel gateway in the local mode, use the following command:

Device# show tunnel eogre gateway detailed gateway-name 

Gateway : Tunnel1
 Mode   : IPv4
 IP     : 9.51.1.11
 Source : Vlan51 / 9.51.1.1
 State  : Up
 SLA ID : 56
 MTU    : 1480
 Up Time: 4 minutes 45 seconds 

 Clients
  Total Number of Wireless Clients      : 0
 Traffic
  Total Number of Received Packets      : 0
  Total Number of Received Bytes        : 0
  Total Number of Transmitted Packets   : 0
  Total Number of Transmitted Bytes     : 0
 Keepalives
  Total Number of Lost Keepalives       : 0
  Total Number of Received Keepalives   : 5
  Total Number of Transmitted Keepalives: 5
  Windows                               : 1
  Transmitted Keepalives in last window : 2
  Received Keepalives in last window    : 2

To view the client summary of EoGRE in the local mode, use the following command: 

Device# show tunnel eogre client summary 

Client MAC      AP MAC          Domain                            Tunnel        VLAN  Local
-------------------------------------------------------------------------------------------
74da.3828.88b0  80e8.6fd4.9520  eogre_domain                      N/A           2121   No

To view the details of an EoGRE global configuration in the local mode, use the following command: 

Device# show tunnel eogre global-configuration 

Heartbeat interval       : 60
Max Heartbeat skip count : 3
Source Interface         : (none)

To view the details of the global tunnel manager statistics in the local mode, use the following command: 

Device# show tunnel eogre manager stats global 

Tunnel Global Statistics
Last Updated                     : 02/18/2019 23:50:35
EoGRE Objects
  Gateways                       : 6
  Domains                        : 2

EoGRE Flex Objects
  AP Gateways                    : 2
  AP Domains                     : 1
  AP Gateways HA inconsistencies : 0
  AP Domains HA inconsistencies  : 0

Config events
  IOS Tunnel updates             : 806
  IOS Domain updates             : 88
  Global updates                 : 48
  Tunnel Profile updates         : 120
  Tunnel Rule updates            : 16
  AAA proxy key updates          : 0

AP events
  Flex AP Join                   : 1
  Flex AP Leave                  : 0
  Local AP Join                  : 0
  Local AP leave                 : 0
  Tunnel status (rx)             : 4
  Domain status (rx)             : 1
  IAPP stats msg (rx)            : 3
  Client count (rx)              : 6
  VAP Payload msg (tx)           : 4
  Domain config (tx)             : 1
  Global config (tx)             : 1
  Client delete (tx)             : 1
  Client delete per domain (tx)  : 3
  DHCP option 82 (tx)            : 4

Client events
  Add-mobile                     : 2
  Run-State                      : 3
  Delete                         : 1
  Cleanup                        : 0
  Join                           : 2
  Plumb                          : 0
  Join Errors                    : 0
  HandOff                        : 0
  MsPayload                      : 2
  FT Recover                     : 0
  Zombie GW counter increase     : 0
  Zombie GW counter decrease     : 0
  Tunnel Profile reset           : 88
  Client deauth                  : 0
  HA reconciliation              : 0

Client Join Events
  Generic Error                  : 0
  MSPayload Fail                 : 0
  Invalid VLAN                   : 0
  Invalid Domain                 : 0
  No GWs in Domain               : 0
  Domain Shut                    : 0
  Invalid GWs                    : 0
  GWs Down                       : 0
  Rule Match Error               : 0
  AAA-override                   : 0
  Flex No Active GW              : 0
  Open Auth join attempt         : 2
  Dot1x join attempt             : 2
  Mobility join attempt          : 0
  Tunnel Profile not valid       : 2
  Tunnel Profile valid           : 2
  No rule match                  : 0
  Rule match                     : 2
  AAA proxy                      : 0
  AAA proxy accounting           : 0
  AAA eogre attributes           : 0
  Has aaa override               : 0
  Error in handoff payload       : 0
  Handoff AAA override           : 0
  Handoff no AAA override        : 0
  Handoff payload received       : 0
  Handoff payload sent           : 0

SNMP Traps
  Client                         : 0
  Tunnel                         : 2
  Domain                         : 0

IPC
  IOSd TX messages               : 0

Zombie Client
  Entries                        : 0

To view the tunnel manager statistics of a specific process instance in the local mode, use the following command:

Device# show tunnel eogre manager stats instance instance-number 

Tunnel Manager statistics for process instance : 0
Last Updated                     : 02/18/2019 23:50:35
EoGRE Objects
  Gateways                       : 6
  Domains                        : 2

EoGRE Flex Objects
  AP Gateways                    : 2
  AP Domains                     : 1
  AP Gateways HA inconsistencies : 0
  AP Domains HA inconsistencies  : 0

Config events
  IOS Tunnel updates             : 102
  IOS Domain updates             : 11
  Global updates                 : 6
  Tunnel Profile updates         : 15
  Tunnel Rule updates            : 2
  AAA proxy key updates          : 0

AP events
  Flex AP Join                   : 1
  Flex AP Leave                  : 0
  Local AP Join                  : 0
  Local AP leave                 : 0
  Tunnel status (rx)             : 4
  Domain status (rx)             : 1
  IAPP stats msg (rx)            : 3
  Client count (rx)              : 6
  VAP Payload msg (tx)           : 4
  Domain config (tx)             : 1
  Global config (tx)             : 1
  Client delete (tx)             : 1
  Client delete per domain (tx)  : 3
  DHCP option 82 (tx)            : 4

Client events
  Add-mobile                     : 2
  Run-State                      : 3
  Delete                         : 1
  Cleanup                        : 0
  Join                           : 2
  Plumb                          : 0
  Join Errors                    : 0
  HandOff                        : 0
  MsPayload                      : 2
  FT Recover                     : 0
  Zombie GW counter increase     : 0
  Zombie GW counter decrease     : 0
  Tunnel Profile reset           : 11
  Client deauth                  : 0
  HA reconciliation              : 0

Client Join Events
  Generic Error                  : 0
  MSPayload Fail                 : 0
  Invalid VLAN                   : 0
  Invalid Domain                 : 0
  No GWs in Domain               : 0
  Domain Shut                    : 0
  Invalid GWs                    : 0
  GWs Down                       : 0
  Rule Match Error               : 0
  AAA-override                   : 0
  Flex No Active GW              : 0
  Open Auth join attempt         : 2
  Dot1x join attempt             : 2
  Mobility join attempt          : 0
  Tunnel Profile not valid       : 2
  Tunnel Profile valid           : 2
  No rule match                  : 0
  Rule match                     : 2
  AAA proxy                      : 0
  AAA proxy accounting           : 0
  AAA eogre attributes           : 0
  Has aaa override               : 0
  Error in handoff payload       : 0
  Handoff AAA override           : 0
  Handoff no AAA override        : 0
  Handoff payload received       : 0
  Handoff payload sent           : 0

SNMP Traps
  Client                         : 0
  Tunnel                         : 2
  Domain                         : 0

IPC
  IOSd TX messages               : 0

Zombie Client
  Entries                        : 0

The show ap tunnel eogre command displays the tunnel domain information, EoGRE events, and the tunnel gateway status on the APs, in the flex mode.

To view the summary information of an EoGRE tunnel gateway in the flex mode, use the following command: 

Device# show ap tunnel eogre domain summary 

AP MAC          Domain                           Active Gateway
-------------------------------------------------------------------------------
80e8.6fd4.9520  eogre_domain                     Tunnel1

To view the wireless tunnel profile summary, use the following command: 

Device# show wireless profile tunnel summary 

Profile Name                     AAA-Override AAA-Proxy DHCP Opt82 Enabled 
-------------------------------- ------------ --------- ---------- --------
eogre_tunnel                               No        No        Yes      Yes
eogre_tunnel_set                           No        No        Yes       No
eogre_tunnel_snmp                          No        No         No       No

To view a wireless tunnel profile's details, use the following command: 

Device# show wireless profile tunnel detailed profile-name 

Profile Name : eogre_tunnel
Status : Enabled
 AAA-Proxy/Accounting-Proxy: Disabled / Disabled
 AAA-Override : Disabled
 DHCP Option82 : Enabled
  Circuit-ID : ap-mac,ap-ethmac,ap-location,vlan
  Remote-ID : ssid-name,ssid-type,client-mac,ap-name

Tunnel Rules

Priority Realm                Vlan Domain (Status/Primary GW/Secondary GW) 
-------- -------------------- ---- ---------------------------------------------
1        *                    2121 eogre_domain (Enabled/Tunnel1/Tunnel2)

To view detailed information about an EoGRE tunnel domain's status, use the following command: 

Device# show ap tunnel eogre domain detailed 

Domain     : eogre_domain
AP MAC     : 80e8.6fd4.9520
Active GW  : Tunnel1

To view the EoGRE events on an AP, use the following command: 

Device# show ap tunnel eogre events 

AP 80e8.6fd4.9520  Event history
Timestamp               #Times   Event               RC Context
----------------------- -------- ------------------- -- ----------------------------------------
02/18/2019 23:50:26.341 6        IAPP_STATS           0 GW Tunnel2 uptime:0s                    
02/18/2019 23:49:40.222 2        CLIENT_JOIN          0 74da.3828.88b0, (eogre_domain/2121)     
02/18/2019 23:48:43.549 1        CLIENT_LEAVE         0 74da.3828.88b0, (eogre_domain/2121)     
02/18/2019 23:47:33.127 1        DOMAIN_STATUS        0 eogre_domain Active GW: Tunnel1         
02/18/2019 23:47:33.124 4        AP_TUNNEL_STATUS     0 Tunnel2 Dn                              
02/18/2019 23:47:33.124 1        MSG_CLIENT_DEL       0 GW Tunnel2 (IP: 9.51.1.12)              
02/18/2019 23:47:33.124 2        TUNNEL_ADD           0 GW Tunnel2                              
02/18/2019 23:47:33.120 3        MSG_CLIENT_DEL_PD    0 GW Tunnel1 (IP: 9.51.1.11)              
02/18/2019 23:47:31.763 2        AP_DOMAIN_PUSH       0 Delete:eogre_domain_set, 0 GWs          
02/18/2019 23:47:31.753 4        AP_VAP_PUSH          0 profile:'eogre_tunnel', wlan:pyats_eogre

To view the summary information of the EoGRE tunnel gateway, use the following command: 

Device# show ap tunnel eogre gateway summary 

AP MAC          Gateway          Type  IP                                      State  Clients
---------------------------------------------------------------------------------------------
80e8.6fd4.9520  Tunnel1          IPv4  9.51.1.11                               Up     1     
80e8.6fd4.9520  Tunnel2          IPv4  9.51.1.12                               Down   0

To view detailed information about an EoGRE tunnel gateway, use the following command: 

Device# show ap tunnel eogre gateway detailed gateway-name 

Gateway : Tunnel1
 Mode   : IPv4
 IP     : 9.51.1.11
 State  : Up
 MTU    : 1476
 Up Time: 14 hours 25 minutes 2 seconds 
 AP MAC : 80e8.6fd4.9520

 Clients
  Total Number of Wireless Clients      : 1
 Traffic
  Total Number of Received Packets      : 6
  Total Number of Received Bytes        : 2643
  Total Number of Transmitted Packets   : 94
  Total Number of Transmitted Bytes     : 20629
  Total Number of Lost Keepalive        : 3

To view summary information about the EoGRE tunnel gateway status, use the following command: 

Device# show ap tunnel eogre domain summary 

AP MAC          Domain                           Active Gateway
-------------------------------------------------------------------------------
80e8.6fd4.9520  eogre_domain                     Tunnel1

To view information about EoGRE events on an AP, use the following command: 

Device# show ap name ap-name tunnel eogre events 

AP 80e8.6fd4.9520  Event history
Timestamp               #Times   Event               RC Context
----------------------- -------- ------------------- -- ----------------------------------------
02/18/2019 23:50:26.341 6        IAPP_STATS           0 GW Tunnel2 uptime:0s                    
02/18/2019 23:49:40.222 2        CLIENT_JOIN          0 74da.3828.88b0, (eogre_domain/2121)     
02/18/2019 23:48:43.549 1        CLIENT_LEAVE         0 74da.3828.88b0, (eogre_domain/2121)     
02/18/2019 23:47:33.127 1        DOMAIN_STATUS        0 eogre_domain Active GW: Tunnel1         
02/18/2019 23:47:33.124 4        AP_TUNNEL_STATUS     0 Tunnel2 Dn                              
02/18/2019 23:47:33.124 1        MSG_CLIENT_DEL       0 GW Tunnel2 (IP: 9.51.1.12)              
02/18/2019 23:47:33.124 2        TUNNEL_ADD           0 GW Tunnel2                              
02/18/2019 23:47:33.120 3        MSG_CLIENT_DEL_PD    0 GW Tunnel1 (IP: 9.51.1.11)              
02/18/2019 23:47:31.763 2        AP_DOMAIN_PUSH       0 Delete:eogre_domain_set, 0 GWs          
02/18/2019 23:47:31.753 4        AP_VAP_PUSH          0 profile:'eogre_tunnel', wlan:pyats_eogre

To view the summary information about EoGRE tunnel domain's status on an AP, use the following command: 

Device# show ap name ap-name tunnel eogre domain summary 

AP MAC          Domain                           Active Gateway
-------------------------------------------------------------------------------
80e8.6fd4.9520  eogre_domain

To view the detailed information about EoGRE tunnel domain on an AP, use the following command: 

Device# show ap name ap-name tunnel eogre domain detailed 

Domain Name    : eogre_domain
 Primary GW    : Tunnel1
 Secondary GW  : Tunnel2
 Active GW     : Tunnel1
 Redundancy    : Non-Revertive
 AdminState    : Up

To view the summary information about EoGRE tunnel gateways on an AP, use the following command: 

Device# show ap name ap-name tunnel eogre gateway summary 

AP MAC          Gateway          Type  IP                                      State  Clients
---------------------------------------------------------------------------------------------
80e8.6fd4.9520  Tunnel1          IPv4  9.51.1.11                               Up     1     
80e8.6fd4.9520  Tunnel2          IPv4  9.51.1.12                               Down   0

To view detailed information about an EoGRE tunnel gateway's status on an AP, use the following command: 

Device# show ap name ap-name tunnel eogre gateway detailed gateway-name 

Gateway : Tunnel2
 Mode   : IPv4
 IP     : 9.51.1.12
 State  : Down
 MTU    : 0
 AP MAC : 80e8.6fd4.9520

 Clients
  Total Number of Wireless Clients      : 0
 Traffic
  Total Number of Received Packets      : 0
  Total Number of Received Bytes        : 0
  Total Number of Transmitted Packets   : 0
  Total Number of Transmitted Bytes     : 0
  Total Number of Lost Keepalive        : 151