Unable to ping over SVI in ASR901

[MarakathaPalli83851]

Dear all,

Greetings.

I have a very simple problem ( i should be making some fundamental mistake). Here is my config:

+-------+                                                                        +--------------+

|   ISP       | ------> DLink Switch  ------------------>|  ASR901 Router |

+-------+               192.168.2.x                           GE0/0  +--------------+

                                Other switch ports

                                 connected to PCs

GE0/0 is up.

I configured SVI as follows:

Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface GigabitEthernet 0/0
Router(config-if)#service instance 100 ethernet
Router(config-if-srv)#bridge-domain 100
Router(config-if-srv)#encapsulation default
Router(config-if-srv)#exit
Router(config-if)#no shut
Router(config-if)#Router#sh ip int br
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 unassigned YES unset up up
GigabitEthernet0/1 unassigned YES unset down down
GigabitEthernet0/2 unassigned YES unset down down
GigabitEthernet0/3 unassigned YES unset down down
GigabitEthernet0/4 unassigned YES unset down down
GigabitEthernet0/5 unassigned YES unset down down
GigabitEthernet0/6 unassigned YES unset down down
GigabitEthernet0/7 unassigned YES unset down down
GigabitEthernet0/8 unassigned YES unset down down
GigabitEthernet0/9 unassigned YES unset down down
GigabitEthernet0/10 unassigned YES unset down down
GigabitEthernet0/11 unassigned YES unset down down
TenGigabitEthernet0/0 unassigned YES unset down down
TenGigabitEthernet0/1 unassigned YES unset down down
FastEthernet0/0 unassigned YES unset administratively down down
Vlan1 unassigned YES unset down down
Vlan100 192.168.2.30 YES manual up up

But I can not ping to 192.168.2.1 :

Router#ping ip 192.168.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Router#

I must be missing something fundamental. Would appreciate your inputs.

Thanks a lot.


Router(config-if)#exit
Router(config)#interface vlan 100
Router(config-if)#ip address 192.168.2.30 255.255.255.0
Router(config-if)#exit
Router(config)#exit

[Giuseppe Larosa]

Hello @MarakathaPalli83851 ,

try to use a BVI interface because that is the right type of logical interface to be used with bridge domains.

Router(config-if)#exit
Router(config)#interface bvi 100
Router(config-if)#ip address 192.168.2.30 255.255.255.0

Router(config-if)# no shut
Router(config-if)#exit
Router(config)#exit

Hope to help

Giuseppe

[MarakathaPalli83851]

Thanks a lot for the quick response.

But there seems to be some issue with BVI. It comes up and then goes down

Router(config)#int bvi 100
Router(config-if)#ip addre
Jul 30 12:31:39.243: %LINK-3-UPDOWN: Interface BVI100, changed state to up
Jul 30 12:31:40.243: %LINEPROTO-5-UPDOWN: Line protocol on Interface BVI100, changed state to upss 192.168.2.30 25
Jul 30 12:31:49.115: %LINK-3-UPDOWN: Interface BVI100, changed state to down
Jul 30 12:31:50.115: %LINEPROTO-5-UPDOWN: Line protocol on Interface BVI100, changed state to down5.255.255.0
Router(config-if)#no
Jul 30 12:31:53.519: %ARP-4-NULL_SRC_MAC: NULL MAC address from 192.168.2.30 on BV100 shut
Router(config-if)#exit
Router(config)#exit
Router#

I tried configuring mac-address, but no luck:

Router(config-if)#mac-address 67ab.c2aa.cac4
Router(config-if)#shut
Router(config-if)#
Jul 30 12:38:49.187: %LINK-5-CHANGED: Interface BVI100, changed state to administratively down
Router(config-if)#
Router(config-if)#no shut
Router(config-if)#
Jul 30 12:38:56.315: %LINK-3-UPDOWN: Interface BVI100, changed state to up
Jul 30 12:38:59.119: %LINK-3-UPDOWN: Interface BVI100, changed state to down

[Richard Burts]

BVI was the traditional type of interface for Integrated Routing and Bridging. But these commands on the ASR are not part of IRB

Router(config-if)#service instance 100 ethernet
Router(config-if-srv)#bridge-domain 100

so I do not think that using BVI was a good suggestion.

The original post shows that G0/0 is up/up and that interface vlan 100 is up/up. So that part looks ok. Please post the output of show arp on the ASR.

Is the address 192.168.2.1 an address on the DLink switch or on the ISP? 

Do we know whether the interface on the DLink switch is an access port or a trunk port?

Do we know whether the ISP is expecting to connect to a device with a manually configured IP address or is perhaps expecting to connect to a device that uses DHCP to get its IP address?