Can't Ping connected dialer IP on cisco 4g wireless 819 router

[kdsingh007]

Hi all,

I have cisco router model (C819HG-LTE-MNA-K9 chassis) and have working sim in it, cellular interface and dialer interface is up but I cant ping my connected dialer IP. ping fails, what could be the reason?

cisco_WTL#sh ip route
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, p - overrides from PfR

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

S* 0.0.0.0/0 is directly connected, Dialer1
10.0.0.0/32 is subnetted, 1 subnets
C 10.0.0.11 is directly connected, Loopback100
192.168.2.0/32 is subnetted, 1 subnets
C 192.168.2.81 is directly connected, Dialer1

cisco_WTL#ping 192.168.2.81 source dialer 1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.81, timeout is 2 seconds:
Packet sent with a source address of 192.168.2.81
.....
Success rate is 0 percent (0/5)

Thanks

[MHM Cisco World]

ping interface use same interface I dont think this work 
use only 
ping 192.168.2.81
that it 
MHM

[kdsingh007]

ping 192.168.2.81 doesn't work either

[MHM Cisco World]

show ip route 
check if the IP still same, this PPP so the IP always change 

[kdsingh007]

it still is the same IP

[MHM Cisco World]

Can I see the dialer interface config 
MHM

[kdsingh007]

!
interface Cellular0
ip address negotiated
ip virtual-reassembly in
encapsulation slip
dialer in-band
no dialer string lte
dialer pool-member 1
dialer-group 1
!
interface Dialer1
ip address negotiated
ip virtual-reassembly in
encapsulation slip
dialer pool 1
dialer idle-timeout 0
dialer string lte
dialer persistent
dialer-group 1
!
ip route 0.0.0.0 0.0.0.0 Dialer1
ip tacacs source-interface Dialer1
!

[MHM Cisco World]

it seem that PPP dialer interface can not self ping check below link 

https://community.cisco.com/t5/routing/does-self-ping-works-on-dialer-interface/td-p/1788304

MHM