cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1592
Views
0
Helpful
1
Replies

Cisco 4300 Series Configuration Issue

adergah
Level 1
Level 1

Hello everybody. This is my first post thank you everyone who will reply and help in advance.

 

I have 2 4331 series router as primary and secondary routers. These router will do bgp connections and will be the border routers.  Here is a brief summary of what I have right now:

 

 

vrf definition MSG_OPS

 rd 102:102

 route-target export 102:102

 route-target import 102:102

 !

 address-family ipv4

 exit-address-family

 !

 address-family ipv6

 exit-address-family

!

vrf definition MSG_TEST

 rd 152:152

 route-target export 152:152

 route-target import 152:152

 !

 address-family ipv4

 exit-address-family

 !

 address-family ipv6

 exit-address-family

!

interface GigabitEthernet0/0/0

 description to_BACKUP_ROUTER

 ip address 10.26.1.1 255.255.255.252

 no ip proxy-arp

 negotiation auto

 

interface GigabitEthernet0/0/1

 description to_LAN

 no ip address

 negotiation auto

!

interface GigabitEthernet0/0/1.102

 description MSG_OPS

 encapsulation dot1Q 102

 vrf forwarding MSG_OPS

 ip address 57.235.205.177 255.255.255.240

 standby version 2

 standby 102 ip 57.235.205.178

 standby 102 priority 255

 standby 102 preempt delay minimum 20

 standby 102 authentication md5 key-string 7

 service-policy input input_match

!

interface GigabitEthernet0/0/1.152

 description MSG_TEST

 encapsulation dot1Q 152

 vrf forwarding PENS_MSG_TEST

 ip address 57.235.205.201 255.255.255.248

 standby version 2

 standby 152 ip 57.235.205.202

 standby 152 priority 255

 standby 152 preempt delay minimum 20

 standby 152 authentication md5 key-string 7

 service-policy input input_match

 

interface GigabitEthernet0/1/0 

 switchport access vlan 102

!

interface GigabitEthernet0/1/1

 switchport access vlan 152

 

interface Vlan102

 description MSG_OPS

 vrf forwarding MSG_OPS

 ip address 57.235.239.210 255.255.255.252

!

interface Vlan152

 description MSG_TEST

 vrf forwarding MSG_TEST

 ip address 57.235.239.222 255.255.255.252

 

0/0/0 and 0/0/1 are the Layer 3 ports and 0/1/0 and 0/1/1 are Layer 2 NIM ES2-8 ports which goes to abroad as BGP protocol. Also there are some BGP configuration which I didn't share here. So my problem is this When I connect a PC to my LAN port Gig0/0/1 and give the PC IP as 57.235.205.189 or something from the range neither PC nor Router can't ping each one. When I look at the result of ARP, MAC of Computer seems as "incomplete". What am I missing here? Also from router itself it doesn't even ping the IP of subinterfaces such as 57.235.205.201. May be I am really missing something very basic but I couldn't see the solution. Any help at this point is appreciated. Thank you very much.

1 Reply 1

Seb Rupik
VIP Alumni
VIP Alumni

Hi there,

When you connect the PC to Gi0/0/1, have you configured its interface to receive dot1q tagged frames and accept the correct VLAN IDs (102, 152). If not, the tagged frames from the router will be dropped.

 

Regarding the router being able to ping its own sub-interfaces, the ping command with no parameters will source packets from the default VRF. Both of your sub-interfaces are in separate VRFs.  So with the router physically isolated they will be unreachable.

Try:

ping vrf MGS-OPS 57.235.205.177

 

cheers,

Seb.

Review Cisco Networking for a $25 gift card