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3Com 4800G and optical fiber

3Com 4800G and optical fiber

3Com 4800G and optical fiber

(OP)
Hi,



On both switches :
- the trunk port is configured to transmit untagged frames on Vlan1 and tagged frames on Vlan2.
- the IP address and the netmask (/24) are assigned to the interface.
- the link light is become green.
- from interface management, the link is detected (Dark gray : SX SFP, Status: Active, Utilization: 0%).

Side switch A, the trunk port (GigabitEthernet1/0/1) is configured like this :



port: GigabitEthernet1/0/1
Input (total): 51794 packets, 5776164 bytes, 19260 broadcasts, 3290 multicasts
Input: 0 input errors, 0 runts, 0 giants, 0 throttles ...
Output (total): 78981 packets, 10607385 bytes, 40796 broadcasts, 36643 multicasts, 0 pauses


In the hyperterminal session, I'm able to sucessfully ping and connect to all devices behind switch A.

Side switch B, the trunk port is configured like this :



In the hyperterminal session, I'm able to sucessfully ping and connect to all devices behind switch B.

The problem :

switch A can't ping switch B and switch B can't ping switch A.

Thanks in advance for any help

RE: 3Com 4800G and optical fiber

When you say "the interface", do you mean the physical interface, or the VLAN interface?
Are the two IP addresses both in the same subnet, in VLAN1?
Are both switches configured for VLAN1 as the management VLAN?
Can you display the VLAN port config?

RE: 3Com 4800G and optical fiber

(OP)
Are the two IP addresses both in the same subnet, in VLAN1? yes
Are both switches configured for VLAN1 as the management VLAN? yes

[4800G-GigabitEthernet1/0/1]display this
#
interface GigabitEthernet1/0/1
 port link-type trunk
 port trunk permit vlan 1 to 6
 broadcast-suppression pps 3000
 undo jumboframe enable

[4800G]display ip interface br
*down: administratively down
(s): spoofing
Interface                                Physical   Protocol   IP Address

Vlan-interface1                            up         up       192.168.80.17

[4800G]display vlan 1
 VLAN ID: 1
 VLAN Type: static
 Route Interface: configured
 IP Address: 192.168.80.17
 Subnet Mask: 255.255.255.0
 Description: VLAN 0001
 Tagged   Ports: none
 Untagged Ports:
    GigabitEthernet1/0/1     GigabitEthernet1/0/2     GigabitEthernet1/0/3
   GigabitEthernet1/0/4     GigabitEthernet1/0/5     GigabitEthernet1/0/6
    GigabitEthernet1/0/7     GigabitEthernet1/0/8     GigabitEthernet1/0/9
    GigabitEthernet1/0/10    GigabitEthernet1/0/11    GigabitEthernet1/0/12
    GigabitEthernet1/0/13    GigabitEthernet1/0/14    GigabitEthernet1/0/15
    GigabitEthernet1/0/16    GigabitEthernet1/0/17    GigabitEthernet1/0/18
    GigabitEthernet1/0/19    GigabitEthernet1/0/20    GigabitEthernet1/0/21
    GigabitEthernet1/0/22    GigabitEthernet1/0/23    GigabitEthernet1/0/24
    GigabitEthernet1/0/25    GigabitEthernet1/0/26

RE: 3Com 4800G and optical fiber

Check the Fiber cable, it must be a 850nm/62.5, 1310 will only work for LX.


___________________________________________
It works! Now if only I could remember what I did...

Dain Bramaged
___________________________________________

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