This document discusses how to understand the operational status of dial peers on Cisco IOS® platforms.
Readers of this document should have knowledge of these topics:
If Voice-Network (VoIP, VoFR, VoATM) and POTS dial-peers are not valid and in the "operational status", they are not considered for the Cisco IOS router/gateway inbound and outbound dial-peer matching process. In order to be considered valid/operational, dial-peers must meet one of these criteria:
Destination-pattern and a voice-port or session target is configured.
Incoming called-number is configured.
Answer-address is configured.
This document is not restricted to specific software and hardware versions.
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Based on the previous three rule criteria, this table displays examples of dial-peer configurations that are in the down operational status.
|Dial Peer Examples|
dial-peer voice 1 pots port 1/0:23 !--- Invalid dial-peer (rule 1): Has voice-port configured only. ! dial-peer voice 2 pots destination-pattern 1T !--- Invalid dial-peer (rule 1): Has destination-pattern configured only. ! dial-peer voice 6 voip session target ipv4:172.16.13.111 !--- Invalid dial-peer (rule 1): Has session target configured only. ! dial-peer voice 7 voip destination-pattern 83... !--- Invalid dial-peer (rule 1): Has destination-pattern configured only. !
Note: A dial-peer configuration statement without any subcommands is considered invalid by violation of 1, 2, and 3.
Based on the previous three rule criteria, this table displays examples of dial-peer configurations that are in up operational status.
|Valid Peer Examples|
dial-peer voice 3 pots destination-pattern 1T port 1/0:23 prefix 1 !--- Valid dial-peer (rule 1): Has voice-port and destination-pattern configured. ! dial-peer voice 4 pots incoming called-number 83. !--- Valid dial-peer (rule 2): Has incoming called-number configured. ! dial-peer voice 5 pots answer-address 408 !--- Valid dial-peer (rule 2): Has answer-address configured. ss configured. ! dial-peer voice 8 voip destination-pattern 83... session target ipv4:172.16.13.111 !--- Valid dial-peer (rule 1): Has session target and destination-pattern configured. ! dial-peer voice 9 voip incoming called-number . !--- Valid dial-peer (rule 2): Has incoming called-number configured. ! dial-peer voice 10 voip answer-address 6666 !--- Valid dial-peer (rule 2): Has answer-address configured. !
Note: Assume a dial-peer intended for inbound matching has an incoming called-number or an answer-address configured and a destination-pattern command is added. After you add the command destination-pattern string , the dial-peer goes operationally down. This is because the router maps a destination-pattern to an address (session target ) or a voice-port (port) for outbound dial-peer matching purposes. In this scenario there is nothing to map to. For example, if you add a destination-pattern on dial-peer 4, 5, 9 and 10, they change their operational status to down.
Note: On dial-peer 4 and 5, if you remove the destination-pattern and add a port command, the dial-peers remain valid. Similarly if we remove the destination-pattern and add the session-target command on 9 and 10, they also remain operational.
In order to check the validity of the dial peer configuration, use the Cisco IOS command show dial-peer voice summary.
|Check the Dial-Peer Configuration|
2600#show dial-peer voice summary dial-peer hunt 0 PASS TAG TYPE ADMIN OPER PREFIX DEST-PATTERN PREF THRU SESS-TARGET PORT 1 pots up down 0 1/0:23 2 pots up down 1T 0 3 pots up up 1 1T 0 1/0:23 4 pots up up 0 5 pots up up 0 6 voip up down 0 syst ipv4:172.16.13.111 7 voip up down 83... 0 syst 8 voip up up 83... 0 syst ipv4:172.16.13.111 9 voip up up 0 syst 10 voip up up 0 syst
- Understanding Dial Peers and Call Legs on Cisco IOS Platforms
- Understanding Inbound and Outbound Dial Peers on Cisco IOS Platforms
- Understanding How Inbound and Outbound Dial Peers are Matched on Cisco IOS Platforms
- Understanding Direct-Inward-Dial (DID) on Cisco IOS Digital (T1/E1) Interfaces
- Configuring Dial Plans, Dial Peers, and Digit Manipulation
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Refer to Cisco Technical Tips Conventions for information on conventions used in this document.