Solved: Routing fast ethernet interfaces between Cisco 2811 and 1841

chrislgicale · ‎01-30-2014

Hello Guys,

Is it possible to route fast ethernet interfaces of Cisco 2811 and Cisco 1841 routers? Do I have to check for its compatibility or some additional configs that make them able to route, as well as ping.

Thank you.

Chris

Richard Burts · ‎02-12-2014

Chris

Thank you for the additional information. As a test would you try this and tell us if the behavior changes

interface FastEthernet0/1

no service-policy input Block_Traffic

HTH

Rick

HTH

Rick

View solution in original post

cadet alain · ‎01-30-2014

Hi,

So you want to connect these 2 routers with their Fastethernet and then ping from one host on 2800 to one host on 1800 ?

Did you connect them with a cross-over cable?

Did you install the routes properly?

--> sh ip int br and sh ip route on both routers

Regards

Alain

Don't forget to rate helpful posts.

chrislgicale · ‎01-31-2014

Hi Alain,

Thanks for the help.

So you want to connect these 2 routers with their Fastethernet and then ping from one host on 2800 to one host on 1800 ?

Yes Sir. That's exactly what I want to implement.

Did you connect them with a cross-over cable?

This is located on two different sites, connected through fiber-optic managed switch (TC3340).

On my Cisco 2811;

interface FastEthernet0/0

description Connected to FCF LAN Network

ip address 192.168.100.253 255.255.255.0

duplex auto

speed auto

interface FastEthernet0/1

ip address 192.168.12.4 255.255.255.248

duplex auto

speed auto

ip classless

ip route 192.168.200.0 255.255.255.0 192.168.12.1

On my Cisco 1841;

interface FastEthernet0/0

ip address 192.168.12.1 255.255.255.248

duplex auto

speed auto

interface FastEthernet0/1

ip address 192.168.200.253 255.255.255.0

duplex auto

speed auto

ip classless

ip route 192.168.100.0 255.255.255.0 192.168.12.4

Workstation from 100.xxx subnet of Cisco 2811 unable to ping the workstation on 200.xxx subnet, and vice versa.

Regards,

Chris

Richard Burts · ‎01-31-2014

Chris

The part of the config that you posted seems reasonable. So my first guess is that there is some issue with the switches or with the fiber connection.

Would you post the output of the command show arp from each of the routers? It would be helpful to know whether they are able to arp to each other. It might also be helpful if you post the output of show cdp neighbor and of show ip interface brief from each router.

HTH

Rick

HTH

Rick

mfurnival · ‎01-31-2014

From your 2811 can you:

- ping 192.168.12.1 ?

- ping 192.168.200.253 ?

- ping 192.168.200.253 with source address 192.168.100.253 ?

If the answer to all of these is yes then the problem is likely to be clients not using the right gateway address

chrislgicale · ‎02-01-2014

Hi Guys,

Thank you for your time wanting to help me. To fully detail my scenario, please find below configs. This are actually live that's why I'm having a hard time to implement changes or reconfiguration.

***CISCO 2811**

Current configuration : 5044 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname FCF_Runruno

!

boot-start-marker

boot-end-marker

!

no aaa new-model

!

resource policy

!

ip subnet-zero

!

ip cef

!

voice-card 0

no dspfarm

!

interface FastEthernet0/0

description Connected to FCF LAN Network

ip address 192.168.100.253 255.255.255.0

ip access-group 100 in

duplex auto

speed auto

!

interface FastEthernet0/0.10

encapsulation dot1Q 10

ip address 192.168.50.1 255.255.255.240

no snmp trap link-status

!

interface FastEthernet0/1

ip address 192.168.12.4 255.255.255.248

duplex auto

speed auto

!

interface Serial0/0/0

description DLL

ip address 192.168.10.1 255.255.255.252

!

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.10.2

ip route 192.168.1.0 255.255.255.0 192.168.10.2

ip route 192.168.5.192 255.255.255.192 192.168.10.2

ip route 192.168.200.0 255.255.255.0 192.168.12.1

!

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

!

access-list 100 deny tcp 192.168.100.0 0.0.0.255 host 208.95.172.130 eq www

access-list 100 deny tcp 192.168.100.0 0.0.0.255 host 67.212.74.178

access-list 100 deny tcp 192.168.100.0 0.0.0.255 host 208.43.221.164

access-list 100 deny tcp 192.168.100.0 0.0.0.255 host 194.71.107.15 eq www

access-list 100 deny tcp 192.168.100.0 0.0.0.255 any eq 1275

access-list 100 deny tcp 192.168.100.0 0.0.0.255 192.168.1.0 0.0.0.255 eq 9100

access-list 100 permit ip any any

!

control-plane

!

voice-port 0/1/0

!

voice-port 0/1/1

!

voice-port 0/1/2

!

voice-port 0/1/3

!

dial-peer voice 1 pots

destination-pattern 6326595663

port 0/1/0

!

dial-peer voice 9 voip

destination-pattern 9T

session target ipv4:192.168.10.2

!

dial-peer voice 10 voip

destination-pattern 9T

session target ipv4:192.168.10.2

!

dial-peer voice 4 pots

destination-pattern 6328468518

port 0/1/1

==================================================================================

FCF_Runruno#sh ip int bri

Interface IP-Address OK? Method Status Protocol

FastEthernet0/0 192.168.100.253 YES NVRAM up up

FastEthernet0/0.10 192.168.50.1 YES NVRAM up up

FastEthernet0/0.20 unassigned YES NVRAM deleted down

FastEthernet0/0.60 unassigned YES NVRAM deleted down

FastEthernet0/1 192.168.12.4 YES manual up up

FastEthernet0/1.10 unassigned YES unset deleted down

Serial0/0/0 192.168.10.1 YES NVRAM up up

Serial0/0/1 192.168.10.1 YES NVRAM administratively down down

==================================================================================

FCF_Runruno#sh cdp neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID

FCF-MKT Ser 0/0/0 166 R S I 2811 Ser 0/0/0

RUN-SW1 Fas 0/0 126 S I WS-C2960G-Gig 0/22

FCF_Runruno#

===================================================================================

FCF_Runruno#sh arp

Protocol Address Age (min) Hardware Addr Type Interface

Internet 192.168.100.9 5 0016.01f0.0dfa ARPA FastEthernet0/0

Internet 192.168.100.10 0 ec9a.7464.ceb5 ARPA FastEthernet0/0

Internet 192.168.100.4 10 0886.3bba.577b ARPA FastEthernet0/0

Internet 192.168.100.3 0 e41f.13e0.ed98 ARPA FastEthernet0/0

Internet 192.168.100.25 43 001a.4b0f.402d ARPA FastEthernet0/0

Internet 192.168.100.22 187 1060.4bdf.b3ad ARPA FastEthernet0/0

Internet 192.168.100.23 12 38ea.a768.6a16 ARPA FastEthernet0/0

Internet 192.168.100.17 19 2c76.8a3f.d27f ARPA FastEthernet0/0

Internet 192.168.100.18 5 1c7e.e534.4d66 ARPA FastEthernet0/0

Internet 192.168.100.60 0 78e3.b59c.f343 ARPA FastEthernet0/0

Internet 192.168.100.62 15 78e3.b593.7706 ARPA FastEthernet0/0

Internet 192.168.100.63 14 5c0a.5b46.75cf ARPA FastEthernet0/0

Internet 192.168.100.58 59 0004.f23b.a73d ARPA FastEthernet0/0

Internet 192.168.100.59 1 f8d1.1139.5ee7 ARPA FastEthernet0/0

Internet 192.168.100.73 64 0007.888f.59b0 ARPA FastEthernet0/0

Internet 192.168.100.75 0 fc4d.d4d6.c65a ARPA FastEthernet0/0

Internet 192.168.100.69 190 207c.8f41.137d ARPA FastEthernet0/0

Internet 192.168.100.71 123 e02a.82e6.c0a4 ARPA FastEthernet0/0

Internet 192.168.100.67 121 001d.7225.4317 ARPA FastEthernet0/0

Internet 192.168.100.90 182 cc52.af5b.528a ARPA FastEthernet0/0

Internet 192.168.100.85 119 3c43.8e25.73f9 ARPA FastEthernet0/0

Internet 192.168.50.1 - 001f.6c6f.77b8 ARPA FastEthernet0/0.10

Internet 192.168.50.6 19 0004.f22c.05ab ARPA FastEthernet0/0.10

Internet 192.168.100.82 0 4c72.b924.e46d ARPA FastEthernet0/0

Internet 192.168.100.83 0 8c7b.9d70.4771 ARPA FastEthernet0/0

Internet 192.168.50.5 2 0004.f22c.107f ARPA FastEthernet0/0.10

Internet 192.168.12.4 - 001f.6c6f.77b9 ARPA FastEthernet0/1

Internet 192.168.100.108 4 b0ee.45ba.0c8f ARPA FastEthernet0/0

Internet 192.168.12.5 55 004f.696e.c7d2 ARPA FastEthernet0/1

Internet 192.168.100.109 80 6817.29a7.1007 ARPA FastEthernet0/0

Internet 192.168.100.111 75 00c3.a143.4985 ARPA FastEthernet0/0

Internet 192.168.12.1 28 004f.696e.c7d2 ARPA FastEthernet0/1

Internet 192.168.12.2 21 004f.696e.c7d2 ARPA FastEthernet0/1

Internet 192.168.100.106 178 bc85.56a4.5f97 ARPA FastEthernet0/0

Internet 192.168.100.107 0 d067.e551.a998 ARPA FastEthernet0/0

Internet 192.168.12.3 21 004f.696f.c1bb ARPA FastEthernet0/1

Internet 192.168.100.100 0 0021.ccbb.a577 ARPA FastEthernet0/0

Internet 192.168.100.101 142 cc3a.619b.92dc ARPA FastEthernet0/0

Internet 192.168.100.96 78 b0ee.4586.8ff1 ARPA FastEthernet0/0

Internet 192.168.100.99 1 902b.3403.604a ARPA FastEthernet0/0

Internet 192.168.100.127 43 0004.f243.30bb ARPA FastEthernet0/0

Internet 192.168.100.122 71 0021.5c9e.68ff ARPA FastEthernet0/0

Internet 192.168.100.112 139 c0f8.da77.6e2c ARPA FastEthernet0/0

Internet 192.168.100.140 0 001d.e085.28fb ARPA FastEthernet0/0

Internet 192.168.100.135 0 8c89.a5ef.4841 ARPA FastEthernet0/0

Internet 192.168.100.130 55 d43d.7e1a.9a1d ARPA FastEthernet0/0

Internet 192.168.100.153 5 001f.1f77.53b6 ARPA FastEthernet0/0

Internet 192.168.100.170 48 f05a.0935.6ed6 ARPA FastEthernet0/0

Internet 192.168.100.161 13 08fc.8861.6fb7 ARPA FastEthernet0/0

Internet 192.168.100.162 0 0000.0000.5284 ARPA FastEthernet0/0

Internet 192.168.100.204 46 004f.6240.87e0 ARPA FastEthernet0/0

Internet 192.168.100.207 43 0004.f2a9.38bf ARPA FastEthernet0/0

Internet 192.168.100.200 94 004f.6240.89e5 ARPA FastEthernet0/0

Internet 192.168.100.222 6 001e.8f4e.3cec ARPA FastEthernet0/0

Internet 192.168.100.216 43 0004.f23e.ae1a ARPA FastEthernet0/0

Protocol Address Age (min) Hardware Addr Type Interface

Internet 192.168.100.208 43 0004.f2a9.36f4 ARPA FastEthernet0/0

Internet 192.168.100.252 55 001a.e2e5.31ae ARPA FastEthernet0/0

Internet 192.168.100.253 - 001f.6c6f.77b8 ARPA FastEthernet0/0

***CISCO 1841**

Building configuration...

Current configuration : 1984 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname RUN-Construct

!

boot-start-marker

boot-end-marker

!

no aaa new-model

!

resource policy

!

mmi polling-interval 60

no mmi auto-configure

no mmi pvc

mmi snmp-timeout 180

ip subnet-zero

ip cef

!

no ip dhcp use vrf connected

!

no ip domain lookup

!

class-map match-any Block_Sites

match protocol http host "*youtube.com*"

match protocol http host "*torrent*"

match protocol http host "*drama.com*"

match protocol http host "*youjizz.com*"

match protocol http host "*redtube.com*"

match protocol http host "*porn*"

!

policy-map Block_Traffic

class Block_Sites

drop

!

interface FastEthernet0/0

ip address 192.168.12.1 255.255.255.248

duplex auto

speed auto

!

interface FastEthernet0/1

ip address 192.168.200.253 255.255.255.0

ip access-group 100 in

duplex auto

speed auto

service-policy input Block_Traffic

!

interface Serial0/1/0

no ip address

shutdown

clockrate 2000000

!

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.12.4

ip route 192.168.1.0 255.255.255.0 192.168.12.4

ip route 192.168.5.192 255.255.255.192 192.168.12.4

ip route 192.168.100.0 255.255.255.0 192.168.12.4

!

no ip http server

!

access-list 100 deny tcp 192.168.200.0 0.0.0.255 host 208.95.172.130 eq www

access-list 100 deny tcp 192.168.200.0 0.0.0.255 host 194.71.107.15 eq www

access-list 100 deny tcp 192.168.200.0 0.0.0.255 host 176.56.229.150 eq www

access-list 100 deny tcp 192.168.200.0 0.0.0.255 host 199.19.95.233 eq www

access-list 100 permit ip any any

!

====================================================================

RUN-Construct#sh ip int bri

Interface IP-Address OK? Method Status Protocol

FastEthernet0/0 192.168.12.1 YES manual up up

FastEthernet0/1 192.168.200.253 YES NVRAM up up

Serial0/1/0 unassigned YES NVRAM administratively down down

NVI0 unassigned YES unset up up

===================================================================

RUN-Construct#sh cdp neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID

Sw_Cons_14 Fas 0/1 146 S I WS-C2960S-Gig 1/0/24

FCF_Runruno Fas 0/0 167 R S I 2811 Fas 0/1

====================================================================

RUN-Construct#sh arp

Protocol Address Age (min) Hardware Addr Type Interface

Internet 192.168.200.163 0 78e3.b5ac.9949 ARPA FastEthernet0/1

Internet 192.168.200.167 200 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.169 215 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.170 221 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.171 0 2c41.3813.31e8 ARPA FastEthernet0/1

Internet 192.168.200.172 139 0000.0000.c12f ARPA FastEthernet0/1

Internet 192.168.200.174 91 0000.0000.802f ARPA FastEthernet0/1

Internet 192.168.200.177 6 001c.25ba.75f1 ARPA FastEthernet0/1

Internet 192.168.200.180 210 004f.696f.a148 ARPA FastEthernet0/1

Internet 192.168.200.184 0 50e5.49a6.248e ARPA FastEthernet0/1

Internet 192.168.200.128 0 0080.64bd.13b2 ARPA FastEthernet0/1

Internet 192.168.200.129 10 0080.64bd.12a9 ARPA FastEthernet0/1

Internet 192.168.200.130 0 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.131 98 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.132 0 001c.25c6.8497 ARPA FastEthernet0/1

Internet 192.168.200.133 85 004f.7805.6a95 ARPA FastEthernet0/1

Internet 192.168.200.134 18 847e.4078.ccfc ARPA FastEthernet0/1

Internet 192.168.200.135 0 28d2.4420.2fa9 ARPA FastEthernet0/1

Internet 192.168.200.136 0 004f.7805.6a95 ARPA FastEthernet0/1

Internet 192.168.200.137 4 004f.7805.6a95 ARPA FastEthernet0/1

Internet 192.168.200.138 0 d067.e554.21b5 ARPA FastEthernet0/1

Internet 192.168.200.139 45 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.148 194 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.149 193 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.151 201 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.155 1 3085.a997.da67 ARPA FastEthernet0/1

Internet 192.168.200.156 8 902b.3424.697d ARPA FastEthernet0/1

Internet 192.168.200.251 6 004f.6703.f08d ARPA FastEthernet0/1

Internet 192.168.200.253 - 001a.e2e5.31af ARPA FastEthernet0/1

Internet 192.168.12.4 41 001f.6c6f.77b9 ARPA FastEthernet0/0

Internet 192.168.200.192 95 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.12.5 44 0021.ccbb.a577 ARPA FastEthernet0/0

Internet 192.168.12.1 - 001a.e2e5.31ae ARPA FastEthernet0/0

Internet 192.168.200.208 193 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.216 239 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.221 9 a45d.3664.a151 ARPA FastEthernet0/1

Internet 192.168.200.222 8 6c3b.e504.4989 ARPA FastEthernet0/1

Internet 192.168.200.35 7 0004.f23e.1686 ARPA FastEthernet0/1

Internet 192.168.200.42 8 004f.696f.a148 ARPA FastEthernet0/1

Internet 192.168.200.46 2 004f.696f.a148 ARPA FastEthernet0/1

Internet 192.168.200.47 224 0004.f23e.0b51 ARPA FastEthernet0/1

Internet 192.168.200.48 8 0004.f23e.18da ARPA FastEthernet0/1

Internet 192.168.200.49 6 0004.f23d.fc21 ARPA FastEthernet0/1

Internet 192.168.200.50 5 0004.f23e.1850 ARPA FastEthernet0/1

Internet 192.168.200.51 11 004f.7805.6a95 ARPA FastEthernet0/1

Internet 192.168.200.52 5 0004.f24c.b646 ARPA FastEthernet0/1

Internet 192.168.200.53 6 0004.f24c.b490 ARPA FastEthernet0/1

Internet 192.168.200.54 6 0004.f23e.4cfa ARPA FastEthernet0/1

Internet 192.168.200.55 5 0004.f23e.3ab1 ARPA FastEthernet0/1

Internet 192.168.200.56 0 0004.f22b.eca0 ARPA FastEthernet0/1

Internet 192.168.200.57 7 0004.f23d.f9ab ARPA FastEthernet0/1

Internet 192.168.200.58 5 0004.f23e.53c4 ARPA FastEthernet0/1

Internet 192.168.200.59 8 0004.f22c.085b ARPA FastEthernet0/1

Internet 192.168.200.60 101 0017.6110.8e2d ARPA FastEthernet0/1

Internet 192.168.200.61 103 0017.6110.b43c ARPA FastEthernet0/1

Protocol Address Age (min) Hardware Addr Type Interface

Internet 192.168.200.62 29 0017.6110.b4b7 ARPA FastEthernet0/1

Internet 192.168.200.63 139 0017.6110.b4ed ARPA FastEthernet0/1

Internet 192.168.200.1 9 0014.f691.93f2 ARPA FastEthernet0/1

Internet 192.168.200.2 0 ac16.2d7a.9e04 ARPA FastEthernet0/1

Internet 192.168.200.3 0 6cae.8b36.b76a ARPA FastEthernet0/1

Internet 192.168.200.4 8 00e0.4c09.7b91 ARPA FastEthernet0/1

Internet 192.168.200.8 7 0004.f23e.ae31 ARPA FastEthernet0/1

Internet 192.168.200.10 2 ec9a.7464.f2c4 ARPA FastEthernet0/1

Internet 192.168.200.11 68 5c50.1551.8540 ARPA FastEthernet0/1

Internet 192.168.200.20 9 e839.3590.0937 ARPA FastEthernet0/1

Internet 192.168.200.21 224 0004.f23e.16f1 ARPA FastEthernet0/1

Internet 192.168.200.22 6 0004.f243.30d6 ARPA FastEthernet0/1

Internet 192.168.200.23 6 0004.f243.2f7d ARPA FastEthernet0/1

Internet 192.168.200.24 5 0004.f243.3172 ARPA FastEthernet0/1

Internet 192.168.200.25 7 0004.f243.2f3a ARPA FastEthernet0/1

Internet 192.168.200.26 7 0004.f23e.ad51 ARPA FastEthernet0/1

Internet 192.168.200.27 6 0004.f243.320e ARPA FastEthernet0/1

Internet 192.168.200.28 7 0004.f2a9.36f6 ARPA FastEthernet0/1

Internet 192.168.200.29 224 0004.f23e.3c28 ARPA FastEthernet0/1

Internet 192.168.200.30 7 0004.f23e.ab71 ARPA FastEthernet0/1

Internet 192.168.200.96 0 fc4d.d4d6.c5c5 ARPA FastEthernet0/1

Internet 192.168.200.97 2 6817.29a7.1057 ARPA FastEthernet0/1

Internet 192.168.200.98 0 fc4d.d4d6.c5a0 ARPA FastEthernet0/1

Internet 192.168.200.99 0 1078.d270.fbf2 ARPA FastEthernet0/1

Internet 192.168.200.100 88 0080.64bd.1283 ARPA FastEthernet0/1

Internet 192.168.200.101 0 847e.402c.f618 ARPA FastEthernet0/1

Internet 192.168.200.102 1 606c.664f.2842 ARPA FastEthernet0/1

Internet 192.168.200.103 3 6c88.14f2.6324 ARPA FastEthernet0/1

Internet 192.168.200.104 0 4c72.b931.8334 ARPA FastEthernet0/1

Internet 192.168.200.105 0 004f.696f.a148 ARPA FastEthernet0/1

Internet 192.168.200.106 4 004f.7805.6a95 ARPA FastEthernet0/1

Internet 192.168.200.107 4 004f.696f.a11c ARPA FastEthernet0/1

Internet 192.168.200.108 0 28d2.441e.f5cd ARPA FastEthernet0/1

Internet 192.168.200.109 0 e840.f2f2.623c ARPA FastEthernet0/1

Internet 192.168.200.110 0 b8b4.2ea4.4def ARPA FastEthernet0/1

Internet 192.168.200.111 30 0080.64bd.12ff ARPA FastEthernet0/1

Internet 192.168.200.112 11 847e.4037.9906 ARPA FastEthernet0/1

Internet 192.168.200.113 2 0080.64b2.4a2e ARPA FastEthernet0/1

Internet 192.168.200.114 0 001f.1f90.96e5 ARPA FastEthernet0/1

Internet 192.168.200.115 0 0080.64b8.4713 ARPA FastEthernet0/1

Internet 192.168.200.116 23 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.118 0 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.119 2 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.120 5 0021.9701.c484 ARPA FastEthernet0/1

Internet 192.168.200.121 1 0080.64bd.12f8 ARPA FastEthernet0/1

Internet 192.168.200.123 0 0080.64bd.13b1 ARPA FastEthernet0/1

Internet 192.168.200.124 1 0080.64b8.4722 ARPA FastEthernet0/1

Internet 192.168.200.126 52 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.127 161 004f.696f.a148 ARPA FastEthernet0/1

Internet 192.168.200.64 9 0017.6110.52aa ARPA FastEthernet0/1

Internet 192.168.200.68 2 0040.8cea.c040 ARPA FastEthernet0/1

Internet 192.168.200.69 82 0040.8cf1.295d ARPA FastEthernet0/1

Internet 192.168.200.71 14 0810.7476.43e0 ARPA FastEthernet0/1

Internet 192.168.200.76 0 0080.64b2.48ae ARPA FastEthernet0/1

Internet 192.168.200.77 0 004f.7805.6755 ARPA FastEthernet0/1

Protocol Address Age (min) Hardware Addr Type Interface

Internet 192.168.200.78 144 0000.0000.8d2f ARPA FastEthernet0/1

Internet 192.168.200.79 193 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.80 90 004f.7805.6755 ARPA FastEthernet0/1

Internet 192.168.200.81 208 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.83 32 004f.696f.a148 ARPA FastEthernet0/1

Internet 192.168.200.84 1 f4f9.5154.af15 ARPA FastEthernet0/1

Internet 192.168.200.85 11 847e.4037.a9c0 ARPA FastEthernet0/1

Internet 192.168.200.86 236 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.87 4 0024.2b92.fbce ARPA FastEthernet0/1

Internet 192.168.200.88 2 4437.e688.eb6a ARPA FastEthernet0/1

Internet 192.168.200.89 199 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.90 211 004f.7805.74b9 ARPA FastEthernet0/1

Internet 192.168.200.91 14 8400.d2ca.83ef ARPA FastEthernet0/1

Internet 192.168.200.92 9 3039.2609.2526 ARPA FastEthernet0/1

Internet 192.168.200.93 2 004f.696f.a11c ARPA FastEthernet0/1

Internet 192.168.200.94 162 0080.64bd.13dc ARPA FastEthernet0/1

Internet 192.168.200.95 0 0080.64bd.12fc ARPA FastEthernet0/1

My Cisco 2811 are actually connected to another 2811 thru serial. The 2811 routers are actually has no problem in routing. But by adding 3rd router (which is Cisco 1841), I'm having a hard time to route the traffic and really need your expertise guys. Here are some PING results by implementing the above configs;

note:

192.168.100.3 = DHCP server

192.168.200.3 = DHCP server

PING from workstation of 192.168.100.XXX subnet

192.168.200.253 = Request Time Out (RTO)

192.168.200.3 = RTO

192.168.12.1 = successful

PING from 192.168.100.253 router (Cisco 2811)

192.168.200.253 = unsuccessful

192.168.200.3 = unsuccessful

192.168.12.1 = successful (OK)

PING from workstation of 192.168.200.XXX subnet

192.168.100.253 = RTO

192.168.100.3 = RTO

192.168.12.4 = RTO

PING from 192.168.200.253 router (Cisco 1841)

192.168.100.253 = successful (OK)

192.168.100.3 = successful (OK)

192.168.12.4 = successful (OK)

Hoping to help me guys. Thank you in advance.

Jeff Van Houten · ‎02-02-2014

Check the gateway settings on the hosts in 192.168.200 and make sure they are set to .253.

Sent from Cisco Technical Support iPad App

Jeff Van Houten · ‎02-02-2014

Also in the 1841 these routes are superfluous and can be deleted.

ip route 192.168.1.0 255.255.255.0 192.168.12.4
ip route 192.168.5.192 255.255.255.192 192.168.12.4
ip route 192.168.100.0 255.255.255.0 192.168.12.4

Sent from Cisco Technical Support iPad App

Richard Burts · ‎02-02-2014

Chris

Thank you for the additional information. I am especially encouraged by the content of the ARP tables which confirm that there is successful communication between the routers.

The fact that the 1841 is successful in accessing resources on the 2811 router convinces me that the routing logic on these routers is correct.

So my conclusion is to agree with Jeff that I would suspect that there is a problem with the default gateway configured on the hosts on the network behind the 1841.

HTH

Rick

HTH

Rick

Richard Burts · ‎02-03-2014

Chris

I have had an additional thought about this issue and have an additional test to suggest. I would suggest that first you use the 1841 and ping 192.168.200.253 and 192.168.200.253. I expect this should work but start with this to eliminate any possibility that there is any firewall or anything else preventing ping to those hosts. As the second step I then suggest that you use extended ping on the 1841. In the extended ping you will have the same destinations of 192.168.200.253 and 192.168.200.3 but you will also specify the source address as 192.168.12.1. I am guessing that these pings will fail. And if they do fail then it will verify that there is an issue with the default gateway on these hosts.

HTH

Rick

HTH

Rick

chrislgicale · ‎02-03-2014

Hi Richard,

I already tried ping and extended ping, as my 192.168.12.1 as source address, all are successfully results.

Hope you can help me guys. Thank you.

Regards,

Chris

Richard Burts · ‎02-03-2014

Chris

Thank you for doing the testing that I suggested. When the results were not what I expected I looked more closely and realized that I asked for the wrong thing. I focused on the addresses 192.168.200.253 and 192.168.200.3 because they were the addresses mentioned in your previous test results. But I now realize that those are the addresses of the router interface and the DHCP server. And it is not surprising that these would respond to the extended ping.

So I have two additional tests to ask you to do. First I would like you to ping from 192.168.200.3 (the DHCP server) to addresses in 192.168.100.0. I expect this ping to succeed (if it was successful when the extended ping specified network 192.168.12 then I would expect that it will be successful to 192.168.100). And if this is successful then it demonstrates that it is not a routing issue on the routers.

Second I would like you to do the ping and extended ping from the 1841 to the workstation in the 192.168.200 network.

HTH

Rick

HTH

Rick

Jan Rolny · ‎02-03-2014

Hi Chris,

I have made lab of your network and it works for me.

So as stated inprevious posts could you please confirm that default gateway of DHCP server or other workstation is configured correctly?(192.168.200.254 on 1841 side)

Because if you are able to ping from host 192.168.100.xxx to 192.168.12.1 so DG have to be configured correctly on 2811 side. Also it confirms that interfaces has not problem.

But contrariwise it does not work. So everything leads to wrong configuration of hosts on 1841 side.

Also I would check local firewall on stations. Especially Server 2012 and Win 7 have firewall turned on by default so it will not answer when you try ping.

Regards,

Jan

chrislgicale · ‎02-09-2014

Guys,

If there's no problem in my routing configuration, can you give me some ideas on how to check if I have correct default gateway on workstation, because whenever I check my ipconfig, I have correct details.

Please see my sample ipconfig below;

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::65fa:185a:fef6:e356%13(Preferred)

IPv4 Address. . . . . . . . . . . : 192.168.200.131(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.200.253

DHCP Server . . . . . . . . . . . : 192.168.200.3

DNS Servers . . . . . . . . . . . : 192.168.200.3

192.168.100.3

Thank you.

Regards,

Chris

Richard Burts · ‎02-09-2014

Chris

The address, mask, and gateway are correct in that ipconfig. Can you post similar output from the workstation in 192.168.100?

In re-reading the thread I notice something that puzzles me. You report this result

PING from 192.168.100.253 router (Cisco 2811)

192.168.200.253 = unsuccessful

and this result

PING from 192.168.200.253 router (Cisco 1841)

192.168.100.253 = successful (OK)

is this correct? If so it is problably a good hint about the problem.

HTH

Rick

HTH

Rick