Overview
This chapter provides configuration guidelines to implement Wide Area Bonjour enabling end-to-end policy-based mDNS service discovery and distribution across multilayer wired and wireless local mode. The first hop mDNS gateway at Layer 2 access switch and the controller must be implemented in service peer mode and paired with LAN and wireless distribution-layer switch in SDG agent role. The network-wide distributed SDG agent must be paired with the Cisco Catalyst Center to enable mDNS service-routing across IP core network based on multiple services and network attributes.
The following figure illustrates unicast mode bonjour network environment with AirPrint capable printer and user computer (macOS, Microsoft Windows, etc.) connected to same Ethernet switch. The computers and mobile devices of the wireless user are associated to wireless AP in local mode across multi-hop IP boundary from printers.
Configuring Wireless AP Multicast Mode
This procedure configures wireless AP multicast on the controller for local mode APs and IP network.
The controller must be configured with unique IP multicast address for wireless AP in local mode to permit mDNS communication across wired and wireless networks.
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Step |
Controller Service Peer Configuration |
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Step-1 Enable global IP Multicast on Cisco Catalyst 9800 series controller. |
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Step-2 Configure Wireless AP mode to Multicast with unique IP Multicast address. |
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The following table provides step-by-step IP multicast configuration guidelines on SDG agent (SDG-1 and SDG-2) at the distribution layer network.
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Step |
Switch SDG Agent Configuration |
WLC SDG Agent Configuration |
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Step-1 Enable IP multicast-routing on distribution layer switches connecting Cisco Wireless Local Mode Access Point and Cisco Wireless LAN Controller. |
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Step-2 Configure IP PIM Rendezvous-Point (RP) on distribution layer switches. |
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Step-3 Enable IP PIM on SVI Interface of distribution layer switches connected Cisco Wireless Local Mode Access Point and Cisco WLC Management VLAN. |
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Step-4 Enable IP PIM on Layer 3 uplink Interface of distribution layer switches connected Cisco Wireless Local Mode Access Point and Cisco WLC Management VLAN. |
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 Note |
IP Multicast must be enabled in the Layer 3 core network to allow Cisco wireless APs in local mode to successfully join the WLC announced multicast group. For more information, refer to the Cisco online documentation to implement IP multicast networks. |
Configuration Example for Default Service List and Policy in Wide Area Bonjour Between Multilayer Wired and Wireless Endpoints
This section provides guidance on configuring Service-Peer, SDG Agent, and Cisco Catalyst Center, allowing the wired and wireless endpoints to dynamically discover default service list using Layer 2 unicast and policy.
Example: Wired and Wireless Access Layer Service Peer Configuration
The following table provides a sample configuration of wired and wireless controller access layer service peer.
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Configuration Step |
Sample Configuration: SP-1 Service-Peer Configuration |
Sample Configuration: SP-2 Service-Peer Configuration |
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Step-1: Enable mDNS gateway and set the gateway mode.
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Step-2: Activate unicast mDNS gateway and attach service policy on wired VLAN and wireless FlexConnect user VLAN of SP-1 and SP-2 Layer 2 access switch. |
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Step-3: Enable unicast service routing between wired and wireless service peer and SDG agent using wired management source VLAN ID and IP address. |
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Example: Wired and Wireless Distribution Layer SDG Agent Configuration
The following table provides a sample configuration of distribution layer SDG agent.
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Configuration Step |
Sample Configuration: SDG-1 – SDG Agent |
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Step-1: Enable mDNS gateway and set the gateway mode. The default mode is sdg-agent. |
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Step-2: Activate unicast mDNS gateway on wired VLAN and wireless user VLAN on SDG agents. |
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Step-3: Configure the service peer-group and attach service-policy on the SDG agent distribution switch and enable service-routing between the assigned Service Peer switch group. |
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Step-4: Associate outbound service-list to a unique service-policy. |
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Step-5: Enable Wide Area Bonjour service-routing with service export configuration association controller IP Address, source interface for stateful connection, and mandatory egress policy for Wide Area service-routing. |
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Configuration Example for Customized Service List and Policy in Wide Area Bonjour Between Multilayer Wired and Wireless Endpoints
This section provides guidance on configuring Service-Peer, SDG Agent and Cisco Catalyst Center, allowing the wired and wireless endpoints to dynamically discover printer using Layer 2 unicast and policy.
Example: Wired and Wireless Access Layer Service Peer Configuration
The following table provides a sample configuration of wired and wireless controller access layer service peer.
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Configuration Step |
Sample Configuration: Switch Service Peer |
Sample Configuration: Wireless Controller Service Peer |
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Step-1: Enable mDNS gateway and set the gateway mode.
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Step-2: Create unique mDNS inbound policy to permit ingress AirPrint service announcement on the Catalyst Switch and wireless controller in service peer mode. |
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Step-3: Create unique mDNS outbound policy to permit egress AirPrint service response on the Catalyst Switch and wireless controller in service peer mode |
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Step-4: Associate inbound and outbound service list to a unique service policy. |
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Step-5: Activate unicast mDNS gateway and attach service policy on wired VLAN and WLAN.
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Step-6: (Optional) Enable service routing on wired service peer mDNS between local VLANs. Also, enable location-based wireless service on the controller.
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Step-7: Enable unicast service routing between wired and wireless service peer and SDG agent.
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Example: Wired and Wireless Distribution Layer SDG Agent Configuration
The following table provides a sample configuration of distribution layer SDG agent.
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Configuration Step |
Sample Configuration: Wired SDG Agent |
Sample Configuration: Wireless SDG Agent |
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Step-1: Enable mDNS gateway and set the gateway mode. |
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Step-2: Activate unicast mDNS gateway on wired VLAN and wireless user VLAN on respective SDG agents. |
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Step-3: Create unique controller bound mDNS policy to permit egress AirPrint service discovery and distribution from Catalyst Switch in SDG agent mode. Inbound policy towards controller is not required. |
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Step-4: Associate outbound service-list to a unique service-policy. |
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Step-5: Enable Wide Area Bonjour service-routing with service export configuration association controller IP Address, source interface for stateful connection and mandatory egress policy for Wide Area service-routing. |
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Cisco Catalyst Center Traditional Multilayer Wired and Wireless Configuration
Configuring Service Filters for Traditional Multilayer Wired and Wireless - Local Mode (GUI)
This procedure implements global service filters, which permit the Cisco Wide Area Bonjour application to dynamically discover and distribute service information between trusted Cisco Catalyst SDG agent switches across the IP network.
Procedure
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Step 1 |
Navigate to the Configuration tab in the Wide Area Bonjour application. |
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Step 2 |
From the sidebar, select the subdomain for which you want to create the service filter. |
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Step 3 |
Check the Service Filter box. |
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Step 4 |
Click Service Filter icon from the topology to view a list of the service filters for the selected domain. You can also manually edit existing service filters from this list. |
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Step 5 |
Click Create Service Filter. |
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Step 6 |
From the Network Mode drop-down list, choose Traditional (the default mode). |
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Step 7 |
Enter a unique name for the service filter. |
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Step 8 |
(Optional) Enter a description for the service filter. |
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Step 9 |
Select one or more service types to permit announcements and queries. |
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Step 10 |
Enable or disable service filters after creating them. By default, service filters are enabled. |
Configuring Source SDG Agents in Traditional Multilayer Wired and Wireless - Local Mode (GUI)
This procedure configures discovery of wired printer sources from the LAN distribution switches paired with Layer 2 Catalyst Switches in a service peer role. The wireless distribution switches paired with a controller in a service peer role receive query responses for wired printers and distribute the responses to querying devices over the wireless local mode network.
Procedure
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Step 1 |
Click Add in the upper-right portion of the Catalyst Center Policy screen. |
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Step 2 |
Select the Query SDG agent radio button. By default, the Source radio button is selected. |
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Step 3 |
From the SDG Agent/IP drop-down list, select an SDG agent (100.0.0.101) which announces the services, for example, Printer. |
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Step 4 |
Select Peer from the Service Layer drop-down list. |
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Step 5 |
Uncheck the box Any. By default, this is enabled. |
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Step 6 |
Select the query VLAN (Vlan-10) to distribute services (Printer) from a specific network. |
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Step 7 |
Enable or disable services from the selected query IPv4 subnet. By default, this is enabled. |
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Step 8 |
Enable or disable services from the selected query IPv6 subnet. By default, this is enabled. |
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Step 9 |
Enter the service peer IPv4 address (10.1.1.1). |
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Step 10 |
Click the + icon to add more service peers, if any. Select Any to accept services from any peer on a selected VLAN. |
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Step 11 |
(Optional) Click Add Next to add more source SDG agents. (Repeat the preceding steps.) |
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Step 12 |
Click DONE. |
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Step 13 |
Click CREATE. |
Configuring Query SDG Agents in Traditional Multilayer Wired and Wireless - Local Mode (GUI)
This procedure configures distributed services to query SDG agents connected to a controller in service peer mode, based on a policy.
Procedure
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Step 1 |
Click Add in the upper-right portion of the DNA-Center Policy screen. |
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Step 2 |
Select the Query SDG agent radio button. By default, the Source radio button is selected. |
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Step 3 |
From the SDG Agent/IP drop-down list, select an SDG agent (100.0.0.102) that receives queries for the services (Printer). |
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Step 4 |
Select Peer from the Service Layer drop-down list. |
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Step 5 |
Uncheck the box Any. By default, this is enabled. |
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Step 6 |
Select the query VLAN (Vlan-30) to distribute services (Printer) to a specific network. |
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Step 7 |
Enable or disable services from the selected query IPv4 subnet. By default, this is enabled. |
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Step 8 |
Enable or disable services from the selected query IPv6 subnet. By default, this is enabled. |
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Step 9 |
Enter the service peer IPv4 address (10.2.1.254). |
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Step 10 |
Click the + icon to add more service-peers, if any. Select Any to accept services from any peer on a selected VLAN. |
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Step 11 |
(Optional) Click Add Next to add more query agents. (Repeat the preceding steps.) |
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Step 12 |
Click DONE. |
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Step 13 |
Click CREATE. |
Verifying Wide Area Bonjour Between Multilayer Wired and Wireless Local Mode
This section provides step-by-step mDNS configuration and service discovery and distribution status based on applied policy on Wired Layer 2 access switch in service peer and SDG agent mode.
Verifying Wired Service-Peer Configuration
Use the following commands on the Cisco Catalyst switch in service peer (SP-1) mode to determine the operational status after applying configuration and discovering the AirPrint service from the local network.
Device# show mdns-sd summary vlan 10
VLAN: 10
==========================================
mDNS Gateway: Enabled
mDNS Service Policy: LOCAL-AREA-POLICY
Active Query: Enabled
: Periodicity 3600 Seconds
Transport Type: IPv4
Service Instance Suffix: Not Configured
mDNS Query Type: ALL
SDG Agent IP: 10.1.1.254
Source Interface: Vlan4094
Device# show mdns-sd service-policy name LOCAL-AREA-POLICY
Service Policy Name Service List IN Name Service List Out Name
===============================================================================
LOCAL-AREA-POLICY LOCAL-AREA-SERVICES-IN LOCAL-AREA-SERVICES-OUT
Device# show mdns-sd cache vlan 10
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Name |
Type |
TTL/ Remaining |
Vlan-Id/ Interface-name |
MAC Address |
RR Record Data |
|---|---|---|---|---|---|
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_universal. _sub. _ipp. _tcp.local |
PTR |
4500/4486 |
Vl10 |
ac18.2651.03fe |
Bldg-1-FL1-PRN. _ipp. _tcp.local |
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_ipp. _tcp.local |
PTR |
4500/4486 |
Vl10 |
ac18.2651.03fe |
Bldg-1-FL1-PRN. _ipp. _tcp.local |
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Bldg-1-FL1- PRN. _ipp. _tcp.local |
SRV |
4500/4486 |
Vl10 |
ac18.2651.03fe |
Bldg-1-FL1-PRN. local |
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Bldg-1-FL1- PRN.local |
A |
4500/4486 |
Vl10 |
ac18.2651.03fe |
10.153.1.1 |
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Bldg-1-FL1- PRN.local |
AAAA |
4500/4486 |
Vl10 |
ac18.2651.03fe |
2001:10:153: 1:79: A40C:6BEE: AEEC |
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Bldg-1-FL1- PRN. _ipp. _tcp.local |
TXT |
4500/4486 |
Vl10 |
ac18.2651.03fe |
(451)'txtvers=1''priority=30'' ty=EPSON WF-3620 Series'' usb_MFG=EPSON'' usb_MDL=W~'~ |
Device# show mdns-sd statistics vlan 10
mDNS Statistics
Vl10:
mDNS packets sent : 612
IPv4 sent : 612
IPv4 advertisements sent : 0
IPv4 queries sent : 612
IPv6 sent : 0
IPv6 advertisements sent : 0
IPv6 queries sent : 0
Unicast sent : 0
mDNS packets rate limited : 0
mDNS packets received : 42
advertisements received : 28
queries received : 14
IPv4 received : 42
IPv4 advertisements received: 28
IPv4 queries received : 14
IPv6 received : 0
IPv6 advertisements received: 0
IPv6 queries received : 0
mDNS packets dropped : 0
=========================================
Query Type : Count
=========================================
PTR : 12
SRV : 0
A : 0
AAAA : 0
TXT : 0
ANY : 3
=================================================
PTR Name Advertisement Query
=================================================
_ipp. _tcp.local 9 4
Verifying Wired SDG Agent Configuration and Service-Routing Status
This section provides information on mDNS configuration and service-routing on Wired SDG Agent (SDG-1) with locally attached Layer 2 access switches in Service-Peer (SP-1) mode and with centrally paired Cisco Catalyst Center for Wide Area Bonjour service-routing.
Device# show mdns-sd summary vlan 10
VLAN: 10
==========================================
mDNS Gateway : Enabled
mDNS Service Policy : LOCAL-AREA-POLICY
Active Query : Disabled
Transport Type : IPv4
Service Instance Suffix : Not-Configured
mDNS Query Type : ALL
SDG Agent IP : Not-Configured
Source Interface : Not-Configured
Device# show mdns-sd cache vlan 10
VLAN: 10
==========================================
mDNS Gateway : Enabled
mDNS Service Policy : LOCAL-AREA-POLICY
Active Query : Disabled
Transport Type : IPv4
Service Instance Suffix : Not-Configured
mDNS Query Type : ALL
SDG Agent IP : Not-Configured
Source Interface : Not-Configured
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Name |
Type |
TTL/ Remaining |
Vlan-Id /Interface-name |
MAC Address |
RR Record Data |
|---|---|---|---|---|---|
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_universal. _sub._ipp ._tcp.local |
PTR |
4500/4500 |
Vl10 |
ac18.2651.03fe |
Bldg-1-FL1-PRN. _ipp. _tcp.local |
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_ipp. _tcp.local |
PTR |
4500/4500 |
Vl10 |
ac18.2651.03fe |
Bldg-1-FL1-PRN. _ipp. _tcp.local |
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Bldg-1-FL1- PRN. _ipp. _tcp.local |
SRV |
4500/4500 |
Vl10 |
ac18.2651.03fe |
0 0 631 Bldg-1-FL1-PRN. local |
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Bldg-1-FL1 -PRN.local |
A |
4500/4500 |
Vl10 |
ac18.2651.03fe |
10.153.1.1 |
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Bldg-1-FL1- PRN.local |
AAAA |
4500/4500 |
Vl10 |
ac18.2651.03fe |
2001:10:153: 1:79: A40C:6BEE: AEEC |
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Bldg-1-FL1- PRN. _ipp. _tcp.local |
TXT |
4500/4500 |
Vl10 |
ac18.2651.03fe |
(451)'txtvers=1''priority=30'' ty=EPSON WF-3620 Series'' usb_MFG=EPSON''usb_MDL=W~'~ |
Device# show mdns-sd sp-sdg statistics
One min, 5 mins, 1 hour
Average Input rate (pps) : 0, 0, 0
Average Output rate (pps) : 0, 0, 0
Messages received:
Query : 15796
ANY query : 0
Advertisements : 28
Advertisement Withdraw : 0
Interface down : 0
Vlan down : 0
Service-peer ID change : 0
Service-peer cache clear : 12
Resync response : 6
Messages sent:
Query response : 5975
ANY Query response : 0
Cache-sync : 61
Get service-instance : 0
Device# show mdns-sd controller detail
Controller: DNAC-Policy
IP: 100.0.0.1, Dest Port : 9991, Src Port : 42446, State : UP
Source Interface : Loopback0, MD5 Disabled
Hello Timer 30 sec, Dead Timer 120 sec, Next Hello 00:00:24
Uptime 2d05h (17:02:37 UTC Jan 15 2021)
Service Buffer: Enabled
Service Announcement:
Filter: DNAC-CONTROLLER-POLICY
Count 50, Delay Timer 30 sec, Pending Announcement 0, Pending Withdraw 0
Total Export Count 56, Next Export in 00:00:24
Service Query:
Query Suppression Enabled
Query Count 50, Query Delay Timer 15 sec, Pending 0
Total Query Count 15791, Next Query in 00:00:09
Verifying Wireless Service-Peer Configuration and Service Status
The command given below helps determine the operational status after applying configuration and discovering the AirPrint service from the remote network.
Device# show mdns-sd summary
mDNS Gateway: Enabled
Mode: Service Peer
Service Announcement Periodicity (in seconds): 30
Service Announcement Count: 50
Service Query Periodicity (in seconds): 15
Service Query Count: 50
Active Response Timer (in seconds): Disabled
ANY Query Forward: Disabled
SDG Agent IP: 10.2.1.254
Source Interface: Vlan4094
Active Query Periodicity (in minutes): 15
Transport Type: IPv4
mDNS AP service policy: default-mdns-service-policy
Device# show wireless profile policy detailed WLAN-PROFILE | sec mDNS
mDNS Gateway
mDNS Service Policy name : LOCAL-AREA-POLICY
Device# show mdns-sd statistics wlan-id 1
mDNS Packet Statistics
-------------------------------------------------
mDNS stats last reset time: 01/10/21 21:38:19
mDNS packets sent: 4592
IPv4 sent: 4592
IPv4 advertisements sent: 4592
IPv4 queries sent: 0
IPv6 sent: 0
IPv6 advertisements sent: 0
IPv6 queries sent: 0
Multicast sent: 0
IPv4 sent: 0
IPv6 sent: 0
mDNS packets received: 297
advertisements received: 80
queries received: 217
IPv4 received: 297
IPv4 advertisements received: 80
IPv4 queries received: 217
IPv6 received: 0
IPv6 advertisements received: 0
IPv6 queries received: 0
mDNS packets dropped: 297
Query Type Statistics
PTR queries received: 1720
SRV queries received: 8
A query received: 8
AAAA queries received: 8
TXT queries received: 97
ANY queries received: 153
OTHER queries received: 0
Device# show mdns-sd sp-sdg statistics
mDNS SP Statistics
last reset time: 01/10/21 21:37:36
Messages sent:
Query : 12675
ANY query : 0
Advertisements : 24
Advertisement Withdraw : 0
Service-peer ID change : 0
Service-peer cache clear : 7
Resync response : 5
Messages received:
Query response : 4619
ANY Query response : 0
Cache-sync : 48
Get service-instance : 0
Device# show mdns-sd query-db
MDNS QUERY DB
Client MAC: 4c32. 7593.e3af
Vlan ID: 30
Wlan ID: 1
Location Group ID: 0
PTR Name(s):
_ipp. _tcp.local
Verifying Wireless SDG Agent Configuration and Service-Routing Status
This section providees information on mDNS configuration and service-routing on Wireless SDG Agent (SDG-2) with locally attached controller in service peer (SP-2) mode and with centrally paired Cisco DNA-Center for Wide Area Bonjour service-routing.
Device# show mdns-sd summary vlan 30
VLAN: 30
==========================================
mDNS Gateway : Enabled
mDNS Service Policy : LOCAL-AREA-POLICY
Active Query : Disabled
Transport Type : IPv4
Service Instance Suffix : Not Configured
mDNS Query Type : ALL
SDG Agent IP : Not Configured
Source Interface : Not Configured
Device# show mdns-sd sp-sdg statistics
One min, 5 mins, 1 hour
Average Input rate (pps) :0, 0, 0
Average Output rate (pps) :0, 0, 0
Messages received:
Query : 12191
ANY query : 0
Advertisements : 0
Advertisement Withdraw : 0
Interface down : 0
Vlan down : 0
Service-peer ID change : 0
Service-peer cache clear : 18
Resync response : 10
Messages sent:
Query response : 1975
ANY Query response : 0
Cache-sync : 19
Get service-instance : 0
Device# show mdns-sd controller detail
Controller: DNAC-Policy
IP: 100.0.0.1, Dest Port : 9991, Src Port : 42931, State : UP
Source Interface: Loopback0, MD5 Disabled
Hello Timer 30 sec, Dead Timer 120 sec, Next Hello 00:00:19
Uptime 2d05h (17:10:18 UTC Jan 15 2021)
Service Buffer: Enabled
Service Announcement:
Filter: DNAC-CONTROLLER-POLICY
Count 50, Delay Timer 30 sec, Pending Announcement 0, Pending Withdraw 0
Total Export Count 0, Next Export in 00:00:19
Service Query:
Query Suppression Enabled
Query Count 50, Query Delay Timer 15 sec, Pending 0
Total Query Count 17093, Next Query in 00:00:19
Verifying Cisco Catalyst Center Configuration and Service-Routing Status
The Cisco Wide Area Bonjour application supports comprehensive assurance capabilities to manage service-routing with network-wide distributed Cisco Catalyst switches in SDG-Agent role and mDNS services discovered over Wide Area Bonjour domain. The assurance capabilities in Cisco Wide Area Bonjour provides ability to determine service-routing state, mDNS service state and many more information at various levels for day-2 operations, analysis and troubleshooting. Each category serves unique function to manage and troubleshoot Wide Area Bonjour service-routing for day-2 operation.
This sub-section provides brief overview for each category of monitor function:
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Dashboard: The landing page of Cisco Wide Area Bonjour application provides key statistics in various formats to quickly determine service-routing health across the network. The network administrator can monitor operational status of service-routing with SDG Agent devices, historical chart of service discovery request, processing and drops from network-wide distributed devices and top five talkers across the network.
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Sub-Domain 360°: The network administrator can briefly collect statistics and status counts in 360° view. The left-panel monitoring, and configuration bar is automatically open upon clicking selected sub-domain to verify configured policies, discovered service-instances on per sub domain basis of the configuration section.
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Monitor: A comprehensive 3-tier monitoring and troubleshooting function of Cisco Wide Area Bonjour application for various day-2 operations. The detail view of SDG Agent, Service-Instance and advanced Troubleshooting capabilities allows network administrator to manage and troubleshoot Wide Area Bonjour domain with single of glass on Cisco Catalyst Center.
For more information, see Cisco Wide Area Bonjour on Cisco Catalyst Center User Guide, Release 2.3.3 guide. The assurance capabilities and operation details are explained in Monitor the Cisco Wide Area Bonjour Application chapter to manage Cisco Wide Area Bonjour application with various supporting service-routing assurance function.
Reference
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Related Topic |
Document Title |
|---|---|
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DNA Service for Bonjour Deployment on Cisco Catalyst 9600 Switch |
Cisco Catalyst 9600 Series Switch Software Configuration Guide, Release 17.5.X |
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DNA Service for Bonjour Deployment on Cisco Catalyst 9500 Switch |
Cisco Catalyst 9500 Series Switch Software Configuration Guide, Release 17.5.X |
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DNA Service for Bonjour Deployment on Cisco Catalyst 9400 Switch |
Cisco Catalyst 9400 Series Switch Software Configuration Guide, Release 17.5.X |
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DNA Service for Bonjour Deployment on Cisco Catalyst 9300 Switch |
Cisco Catalyst 9300 Series Switch Software Configuration Guide, Release 17.5.X |
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Cisco Wide Area Bonjour Application on Cisco Catalyst Center User Guide |
Cisco Wide Area Bonjour Application on Cisco Catalyst Center User Guide, Release 2.2.2 |
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