H323 Router: 0 dial-peers configured but working...huh? 1

[encarter]

i setup a remote office this week.
The office just has a Cisco 2811 and a data circuit where we send our VoIP traffic back to our call manager at a different site.
I had 0 dial-peers configured yet 4 digit dialing was working and PSTN calls worked fine too. (PSTN calls go out our corporate site too)

How is this possible. I thought H.323 routers do digit analysis on the router....as opposed to MGCP.


----------------------

I ended up putting these dial-peers on the router.
(but even with these dial-peers) - shouldn't long distance not work?




!
dial-peer cor custom
!
!
!
dial-peer voice 1 pots
trunkgroup pots
destination-pattern 8T
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
incoming called-number .
!
dial-peer voice 10 pots
trunkgroup pots
destination-pattern 911
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
fax rate disable
forward-digits 3
!
dial-peer voice 11 pots
trunkgroup pots
destination-pattern 8911
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
fax rate disable
forward-digits 3
!
dial-peer voice 60 voip
snmp enable peer-trap poor-qov
preference 1
destination-pattern 6...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.2
incoming called-number .
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad
!
dial-peer voice 61 voip
snmp enable peer-trap poor-qov
preference 2
destination-pattern 6...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.1
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad
!
dial-peer voice 62 voip
snmp enable peer-trap poor-qov
preference 1
destination-pattern 1...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.2
incoming called-number .
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad
!
dial-peer voice 63 voip
snmp enable peer-trap poor-qov
preference 2
destination-pattern 1...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.1
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad

 

[whykap]

The local router is only routing voice/data traffic back to corporate where all calls are originating. Therefore no need for dial-peers on the local router.
Call manager does not even know this router exists so configuring any dial-peers is a moot point.

 

[encarter]

can you explain a little more?

I was under the impression that H.323 gateways use there own Dial-Peers to me call routing decision and MGCP gateways use a centralized dial-plan (call manager).

I know that Dial-Peers are certainly required in SRST mode.

 

[whykap]

You mentioned that all the PSTN calls go out the corporate office and not the local router. So there is no need for the local router to have dial-peers or any MGCP configuration. That would only be needed in case you are routing calls out the PSTN from that router which you are not.
Also in SRST only DN to DN dialing would work since no PSTN trunks reside on the local router. So having dial-peers would make no difference.

By the way with no local trunks how are you dealing with 911 calls placed from the remote site? Something to think about.

 

[encarter]

I guess the part the im getting hung up on is how does the router know where to send the call to or at least send the singalling to.

to answer your other question we have a pots line for 911 and a configured dial peer listed above.

 

[whykap]

the 911 dial peer does not have a port assigned to it so it's not been used.
What I am trying to say is the phones are not using that gateway for dial out but the gateway in your home office. The router on the remote site merely passes the voice traffic to the home office along with the rest of the data traffic. Unless I can see how your network is designed and flows i cannot give you an exact answer.
One thing is for sure. The dial-peers above are in the router but not used as they are incomplete configuration.

 

[encarter]

If you see 911 calls use a trunk group. So i don't think a specific port is necessary.

The default gateway for the phones at the remote site is the remote router.

Grrr I'm just not getting this logic - its not your fault. Maybe i'll post this question in the Call Manager forum.

 

[whykap]

i missed the trunk group part, you are right on that.
So is the remote router configured in call manager as a gateway?
Are the route patterns assigned to the remote site pointing to the remote gateway or the gateway at corporate?

There are a lot of reasons that call manager will ignore the configuration of an h323 router. remember that unless a call gets send to that router from call manager the dial-peers won't activate.
Without a better topology and set up info it will be hard to tell you what's going on.
Who set this up? can you post the whole router config and not just the dial-peers?

 

[encarter]

Sorry for the delay, have been a bit busy with other stuff.

Yes the remote router is configured as a H.323 gateway in call manager.

The route patters are assigned to the gateway at corporate for pretty much everything except 911 which is set to the remote router and the out a POTS line.


I'm trying to understand call-flow is what im really getting out. It sounds like all call-control traffic is going to call-manager and then the call-manager routes to whatever is defined.


Here is the config:

!
version 12.4
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
service password-encryption
!
hostname IDS-Decatur-2811
!
boot-start-marker
boot-end-marker
!
logging buffered 4096 warnings
no logging console
enable secret 5 1$1
!
no aaa new-model
memory-size iomem 15
clock timezone EST -5
clock summer-time EDT recurring
network-clock-participate wic 0
no network-clock-participate wic 1
--More--  dot11 syslog
!
!
ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address 172.17.14.1 172.17.14.20
ip dhcp excluded-address 172.17.14.200 172.17.14.254
!
ip dhcp pool IDS
network 172.17.14.0 255.255.255.0
default-router 172.17.14.1
dns-server 172.17.0.77 172.17.0.76
option 150 ip 172.17.100.2 172.17.100.1
domain-name
netbios-name-server 172.17.0.77
netbios-node-type h-node
!
!
no ip domain lookup
ip domain name
multilink bundle-name authenticated
!
!
--More--  !
trunk group pots
!
voice-card 0
dspfarm
!
password encryption aes
!
voice call carrier capacity active
voice rtp send-recv
!
voice service voip
!
!
voice class codec 99
codec preference 1 g711ulaw
codec preference 2 g729br8
!
!
!
!
!
!
--More--  !
!
!
!
!
!
!
crypto pki trustpoint TP-self-signed-2333917067
subject-name cn=IOS-Self-Signed-Certificate-2333917067
revocation-check none
rsakeypair TP-self-signed-2333917067
!
crypto pki trustpoint TP-self-signed-3726502329
subject-name cn=IOS-Self-Signed-Certificate-3726502329
revocation-check none
rsakeypair TP-self-signed-3726502329
!
crypto pki trustpoint TP-self-signed-2358359566
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-2358359566
revocation-check none
rsakeypair TP-self-signed-2358359566
!
--More--  !
crypto pki certificate chain TP-self-signed-2333917067
crypto pki certificate chain TP-self-signed-3726502329
crypto pki certificate chain TP-self-signed-2358359566
certificate self-signed 01
533E42B2 25C4C288 CBDD9B6E 52A9DE7B 5904B3E6 C8C9B9DE EEF6CE45 CAA271FB
EEDE937F 8BB1B095 8F70DAFC 0425BB0E 3E1324B3 CCDDFD68 CD23A6A7 FAB0E04D
70190203 010001A3 81863081 83300F06 03551D13 0101FF04 05300301 01FF3030
0603551D 11042930 27822549 44532D44 65636174 75722D32 3831312E 68617276
61726464 72756767 726F7570 2E636F6D 301F0603 551D2304 18301680 141373FB
DF02CEDE FE56E3D6 C6851ECE AE745AD2 05301D06 03551D0E 04160414 1373FBDF
02CEDEFE 56E3D6C6 851ECEAE 745AD205 300D0609 2A864886 F70D0101 04050003
81810033 59B468BE 87EB19E2 B706BD19 57AF2B33 F1B0897C CEF9DB2F A0097B8A
D2E13723 0A3C0201 F45B1E0C 7C153E48 9498FB34 1FDFE62A 5283EECB FE03B1D6
48A57C58 6FD6D9C4 935DBFBB 4EA32340 A9160DB0 AAED1F93 1B481485 ED765D89
--More--   D3B36AFA B3B48816 F637959F 2F3DA980 05FBDAC3 963CCCA4 6C623ADD 0052F3EF 7C2816
quit
!
!
username nbhg password 7 17B
archive
log config
hidekeys
!
!
controller T1 0/0/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24
!
controller T1 0/1/0
framing esf
linecode b8zs
!
!
class-map match-any VOICE-CONTROL
match ip dscp af31
--More--   match ip dscp cs3
class-map match-all VIDEO
match ip dscp af41
class-map match-any VOICE
match ip dscp ef
match ip dscp cs5
!
!
policy-map CHECK
class VOICE
class VOICE-CONTROL
policy-map QoS
class VOICE
priority 768
set dscp ef
class VOICE-CONTROL
bandwidth 50
set dscp af31
class VIDEO
priority 334
class class-default
fair-queue
set dscp default
--More--  !
!
!
!
!
interface FastEthernet0/0
description *** LAN Interface ***
ip address 172.17.14.2 255.255.255.0
ip accounting output-packets
ip pim sparse-mode
duplex full
speed auto
standby 0 ip 172.17.14.1
standby 0 priority 110
standby 0 preempt
h323-gateway voip interface
h323-gateway voip bind srcaddr 172.17.14.2
!
interface FastEthernet0/1
no ip address
shutdown
duplex full
speed auto
--More--  !
interface Serial0/0/0:0
bandwidth 1544
ip address XXXXXX
ip accounting output-packets
ip nbar protocol-discovery
ip pim sparse-mode
ip route-cache flow
no cdp enable
service-policy output QoS
!
router ospf 1
router-id 172.17.14.2
log-adjacency-changes
network 172.17.14.0 0.0.0.255 area 0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 172.17.14.3 200
!
ip flow-export version 5
ip flow-export destination 172.17.2.95 2055
--More--  !
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip pim rp-address 172.17.255.1
no ip pim dm-fallback
!
ip access-list extended NOVOIP
deny ip host 172.17.14.51 host 172.17.100.1
deny ip host 172.17.100.1 host 172.17.14.51
deny ip host 172.17.14.51 host 172.17.100.2
deny ip host 172.17.100.2 host 172.17.14.51
permit ip any any
!
logging trap debugging
logging source-interface FastEthernet0/0
logging 172.17.1.10
access-list 23 permit 10.10.10.0 0.0.0.7
access-list 75 permit 172.17.0.75
snmp-server community RW 99
snmp-server community MARS-snmp-C0MM RO 75
--More--  snmp-server ifindex persist
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server enable traps vrrp
snmp-server enable traps tty
snmp-server enable traps xgcp
snmp-server enable traps flash insertion removal
snmp-server enable traps envmon
snmp-server enable traps icsudsu
snmp-server enable traps isdn call-information
snmp-server enable traps isdn layer2
snmp-server enable traps isdn chan-not-avail
snmp-server enable traps isdn ietf
snmp-server enable traps ds0-busyout
snmp-server enable traps ds1-loopback
snmp-server enable traps atm subif
snmp-server enable traps cnpd
snmp-server enable traps config-copy
snmp-server enable traps config
snmp-server enable traps dial
snmp-server enable traps dsp card-status
snmp-server enable traps entity
snmp-server enable traps frame-relay multilink bundle-mismatch
snmp-server enable traps frame-relay
--More--  snmp-server enable traps frame-relay subif
snmp-server enable traps hsrp
snmp-server enable traps rsvp
snmp-server enable traps ipsla
snmp-server enable traps syslog
snmp-server enable traps l2tun session
snmp-server enable traps vtp
snmp-server enable traps voice poor-qov
snmp-server enable traps dnis
snmp-server host 172.17.0.75 MARS-snmp-C0MM
snmp-server host 172.17.0.76
!
!
!
control-plane
!
!
!
voice-port 0/2/0
trunk-group pots 1
input gain 2
output attenuation 5
echo-cancel coverage 32
--More--   non-linear threshold -24
no comfort-noise
connection plar 4523
description FXO
caller-id enable
!
voice-port 0/2/1
trunk-group pots 2
input gain 2
output attenuation 5
echo-cancel coverage 32
non-linear threshold -24
no comfort-noise
connection plar 1100
shutdown
description FXO
caller-id enable
!
voice-port 0/2/2
trunk-group pots 3
input gain 2
output attenuation 5
echo-cancel coverage 32
--More--   non-linear threshold -24
no comfort-noise
connection plar 1100
shutdown
description FXO
caller-id enable
!
voice-port 0/2/3
input gain 2
output attenuation 5
echo-cancel coverage 32
non-linear threshold -24
no comfort-noise
connection plar 4523
shutdown
description FXO
caller-id enable
!
!
!
!
dial-peer cor custom
!
--More--  !
!
dial-peer voice 1 pots
trunkgroup pots
destination-pattern 8T
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
incoming called-number .
!
dial-peer voice 10 pots
trunkgroup pots
destination-pattern 911
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
fax rate disable
forward-digits 3
!
dial-peer voice 11 pots
trunkgroup pots
destination-pattern 8911
progress_ind alert enable 8
--More--   progress_ind progress enable 8
progress_ind connect enable 8
fax rate disable
forward-digits 3
!
dial-peer voice 60 voip
snmp enable peer-trap poor-qov
preference 1
destination-pattern 6...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.2
incoming called-number .
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad
!
dial-peer voice 61 voip
snmp enable peer-trap poor-qov
preference 2
--More--   destination-pattern 6...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.1
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad
!
dial-peer voice 62 voip
snmp enable peer-trap poor-qov
preference 1
destination-pattern 1...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.2
incoming called-number .
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
--More--   ip qos dscp cs5 media
no vad
!
dial-peer voice 63 voip
snmp enable peer-trap poor-qov
preference 2
destination-pattern 1...
progress_ind setup enable 3
voice-class codec 99
session target ipv4:172.17.100.1
dtmf-relay h245-alphanumeric
fax rate disable
icpif 10
expect-factor 5
ip qos dscp cs5 media
no vad
!
!
!
call-manager-fallback
max-conferences 8 gain -6
transfer-system full-consult
ip source-address 172.17.14.1 port 2000
--More--   max-ephones 30
max-dn 144 dual-line
voicemail 817347436000
no huntstop
time-zone 5
!
!
line con 0
login local
line aux 0
line vty 0 4
privilege level 15
--More--   login local
transport input telnet ssh
line vty 5 15
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
!
end