Solved: Can't ping subinterface

grinch182 · ‎10-21-2011

Good day colleagues.

I'm having issue with subinterfaces. I've connected two routers and created subinterfaces on both ends. I configured both sides but can't ping neighbor router. More than that I can't ping local address on subinterface.

Pleace check my config and tell me what I did wrong.

Thanks in advanced.

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname R1

!

boot-start-marker

boot-end-marker

!

no aaa new-model

memory-size iomem 5

!

ip cef

no ip domain lookup

!

interface Serial0/0

no ip address

serial restart-delay 0

!

interface Serial0/0.10

ip address 192.168.1.1 255.255.255.0

!

no ip http server

no ip http secure-server

!

control-plane

!

end

*****

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname R2

!

boot-start-marker

boot-end-marker

!

no aaa new-model

memory-size iomem 5

!

ip cef

no ip domain lookup

!

interface Serial0/0

no ip address

serial restart-delay 0

clock rate 128000

!

interface Serial0/0.10

ip address 192.168.1.2 255.255.255.0

!

no ip http server

no ip http secure-server

!

control-plane

!

end

****

There is also show ip interface brief comand output

R1#sh ip int brief

Interface IP-Address OK? Method Status Protocol

Serial0/0 unassigned YES unset up up

Serial0/0.10 192.168.1.1 YES manual up up

R1#ping 192.168.1.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

****

R2#sh ip int brief

Interface IP-Address OK? Method Status Protocol

Serial0/0 unassigned YES unset up up

Serial0/0.10 192.168.1.2 YES manual up up

R2#ping 192.168.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

cadet alain · ‎10-21-2011

Hi,

I don't think it will work as subinterfaces on serial interfaces are done for frame-relay encapsulation.

PPP won't let you do that and hdlc does let you configure the subinterface but it can't work imho.

Regards.

Alain.

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View solution in original post

cadet alain · ‎10-21-2011

Hi,

it will only work with Frame-relay on serial interfaces as it seems that this feature is not supported for HDLC or PPP.

Alain.

Don't forget to rate helpful posts.

View solution in original post

Mahesh Gohil · ‎10-21-2011

May we get router series detail along with inventory.

Regards

Mahesh

grinch182 · ‎10-21-2011

R1#sh version

Cisco IOS Software, 3600 Software (C3640-JK9S-M), Version 12.4(16), RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Compiled Wed 20-Jun-07 11:43 by prod_rel_team

ROM: ROMMON Emulation Microcode

ROM: 3600 Software (C3640-JK9S-M), Version 12.4(16), RELEASE SOFTWARE (fc1)

R1 uptime is 36 minutes

System returned to ROM by unknown reload cause - suspect boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19

System image file is "tftp://255.255.255.255/unknown"

Cisco 3640 (R4700) processor (revision 0xFF) with 124928K/6144K bytes of memory.

Processor board ID FF1045C5

R4700 CPU at 100MHz, Implementation 33, Rev 1.2

4 Serial interfaces

DRAM configuration is 64 bits wide with parity enabled.

125K bytes of NVRAM.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

*****

NAME: "3640 chassis", DESCR: "3640 chassis"

PID: , VID: 0xFF, SN: FF1045C5

NAME: "3640 Chassis Slot 0", DESCR: "3640 Chassis Slot"

PID: , VID: , SN:

NAME: "Four Port High-Speed Serial", DESCR: "Four Port High-Speed Serial"

PID: NM-4T= , VID: 1.1, SN: 10300772

NAME: "Serial0/0", DESCR: "M4T"

PID: , VID: , SN:

NAME: "Serial0/1", DESCR: "M4T"

PID: , VID: , SN:

NAME: "Serial0/2", DESCR: "M4T"

PID: , VID: , SN:

NAME: "Serial0/3", DESCR: "M4T"

PID: , VID: , SN:

NAME: "3640 Chassis Slot 1", DESCR: "3640 Chassis Slot"

PID: , VID: , SN:

NAME: "3640 Chassis Slot 2", DESCR: "3640 Chassis Slot"

PID: , VID: , SN:

NAME: "3640 Chassis Slot 3", DESCR: "3640 Chassis Slot"

PID: , VID: , SN:

cadet alain · ‎10-21-2011

Hi,

I don't think it will work as subinterfaces on serial interfaces are done for frame-relay encapsulation.

PPP won't let you do that and hdlc does let you configure the subinterface but it can't work imho.

Regards.

Alain.

Don't forget to rate helpful posts.

grinch182 · ‎10-21-2011

if I will choose other than serial interface type (FastEthernet for example) I also cnat create sub interfaces without configuring encapsulation dot.1q and creating vlans. Maybe you will give me an advice how can I configure and make works few VRF via 1 physical link?

Sincerely,

GRinch

nkarpysh · ‎10-21-2011

You can create SVI interfaces, put single VRF on each SVI and pass those VLANs through a physical link making it trunk.

Nik

HTH,
Niko

grinch182 · ‎10-21-2011

In this case I will not face any problem. I was wondering if ti's possible to make it works through serial links. Thanks.

Mahesh Gohil · ‎10-21-2011

Hi Can you try below FR config.

interface Se/0/0
no ip address
no ip redirects
no ip proxy-arp
encapsulation frame-relay

interface Se0/0.101 point-to-point
ip vrf forwarding test1
ip address 10.10.10.1 255.255.255.252
frame-relay interface-dlci 101

interface Se0/0.102 point-to-point
ip vrf forwarding test2
ip address 10.10.10.5 255.255.255.252
frame-relay interface-dlci 102

Same way at other end.

Regards

Mahesh

grinch182 · ‎10-21-2011

I know there is no problem with FR, but I would like to use IP. Thanks for advice.

Sincerely,

GRinch

cadet alain · ‎10-21-2011

Hi,

it will only work with Frame-relay on serial interfaces as it seems that this feature is not supported for HDLC or PPP.

Alain.

Don't forget to rate helpful posts.

grinch182 · ‎10-21-2011

Thank you guys for your help and so fast reaction. Discussion is done =)