01-06-2020 07:36 AM - edited 01-06-2020 09:30 AM
Hello!
Im new to voip. I'm taking an online ccna voice course. Im labbing this all up using real equipment. Everything is going great so far however, I've reached a stumbling block. In the lab there is voice traffic that's going from one router to another. One router is running CME while the other has 2 simple POTS dial peers for 2 analog phones using FXS ports, which are working and can call each other. The CME router has 4-5 functional IP phones and 1 CIPC, all can call each other.
My problem is in between the 2 routers. The voice traffic is not crossing over. They are connected to each other using VWIC3s as serial interfaces with a T1 crossover cable. The interfaces have green LEDs and they can ping each other.
Below is a look at the router to router topology:
This is what I configured for the Legacy router:
LEGACY_VOICE_NJ#conf t
#card type t1 0
#controller t1 0/1/0
#linecode b8zs
#framing esf
#channel-group 0 timeslots 1 - 24
#exit
#int Serial0/1/0:0
#ip add 10.1.1.2 255.255.255.0
#no shut
#end
This is what I configured for the CME router:
CME_VOICE_NY#conf t
#card type t1 0
#controller t1 0/1/0
#linecode b8zs
#framing esf
#channel-group 0 timeslots 1 - 24
#exit
#int Serial0/0/0:0
#ip add 10.1.1.1 255.255.255.0
#no shut
#end
This is the voip dial peer config on the CME router pointing to the 3301 and 3302 extensions in the legacy router:
CME_Voice_NY(config)#dial-peer voice 330 voip
CME_Voice_NY(config-dial-peer)#destination-pattern 330.
CME_Voice_NY(config-dial-peer)#session target ipv4:10.1.1.2
CME_Voice_NY(config-dial-peer)#end
Because the CME voip lan is in the 172.16.1.0/24 subnet and unknown to the legacy router, i setup eigrp in between them to which the legacy router knows about the advertisement and can ping it. The issue is with the calls, they won't go across the routers. Can anyone help or at least lead me in the right direction? Yes, I've researched it and have tried several different things but no dice.
Solved! Go to Solution.
01-06-2020 12:55 PM
01-06-2020 08:44 AM
01-06-2020 09:22 AM
Hi Elliot, thank you for responding!
At the moment, the CME router is advertising its 172.16.1.x lan to the Legacy Voice router using EIGRP. The legacy router has learned the route and can ping inside the 172 subnet. The Legacy router only has the 10.1.1.0/24 subnet which is directly connected to the CME router. Here is the sh ip route output from both anyway:
Legacy Router
LEGACY_VOICE_NJ#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Serial0/1/0:0
L 10.1.1.2/32 is directly connected, Serial0/1/0:0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2178816] via 10.1.1.1, 02:46:21, Serial0/1/0:0
CME Router
CME_Voice_NY#sh ip ro
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Serial0/0/0:0
L 10.1.1.1/32 is directly connected, Serial0/0/0:0
172.16.0.0/16 is variably subnetted, 4 subnets, 2 masks
C 172.16.1.0/24 is directly connected, GigabitEthernet0/0.10
L 172.16.1.1/32 is directly connected, GigabitEthernet0/0.10
C 172.16.2.0/24 is directly connected, GigabitEthernet0/0.50
L 172.16.2.1/32 is directly connected, GigabitEthernet0/0.50
01-06-2020 09:27 AM - edited 01-06-2020 09:29 AM
Here are the eigrp configs for each:
Legacy
LEGACY_VOICE_NJ#sh run | s eigrp
router eigrp 1000
network 10.1.1.0 0.0.0.255
CME
CME_Voice_NY#sh run | s eigrp
router eigrp 1000
network 10.1.1.0 0.0.0.255
network 172.16.1.0 0.0.0.255
They can ping each other. Legacy can get to the internal 172 subnet of the CME router. There is no other subnet configured under the Legacy router. The phones are on 2 FXS ports.
01-06-2020 10:25 AM
01-06-2020 11:24 AM
Honestly, Im not sure about H.323 or SIP, thats what the lab video leaves out. These are the dial peers for the FXS ports:
LEGACY_VOICE_NJ#sh run | s dial-peer
dial-peer voice 3301 pots
destination-pattern 3301
port 0/0/0
dial-peer voice 3302 pots
destination-pattern 3302
port 0/0/1
01-06-2020 12:05 PM
01-06-2020 12:39 PM
Not sure what that means exactly, but this is what I have for voip service voip on the CME router:
!
voice service voip
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none
sip
registrar server expires max 600 min 60
!
What does that voip service voip config mean?
01-06-2020 12:55 PM
01-06-2020 02:28 PM
01-06-2020 03:52 PM
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