Netgear R7800 LAN1/4 not working

Installing and Using OpenWrt
1

OpenWrt 19.07.1 r10911-c155900f66 / LuCI openwrt-19.07 branch git-20.029.45734-adbbd5c

Originally used TFTP to upload an OpenWRT 18.x version and did a sysupgrade to the more current version listed above. Throughout both versions:

  • There are no link lights on any of the ethernet ports on the units.
  • LAN2 and LAN3 work without issue. LAN1 and LAN4 do not.

Any thoughts or suggestions? I don't mind upgrading again to 19.07.2 but that will have to wait until later today.

2

Can you do a swconfig dev switch0 show ?

3 
root@OpenWrt:~# swconfig dev switch0 show
Global attributes:   
        enable_vlan: 1  
        ar8xxx_mib_poll_interval: 0
        ar8xxx_mib_type: 0
        enable_mirror_rx: 0   
        enable_mirror_tx: 0
        mirror_monitor_port: 0
        mirror_source_port: 0
        arl_age_time: 300
        arl_table: address resolution table 
Port 0: MAC dc:ef:09:e3:2d:17
Port 2: MAC d0:50:99:37:ae:ef                                                         
Port 3: MAC 00:19:99:75:31:85
Port 5: MAC 00:01:5c:87:16:46
Port 6: MAC 58:d9:c3:64:a6:bd
Port 6: MAC b4:6b:fc:d1:61:fe
Port 6: MAC dc:ef:09:e3:2d:16
                                           
        igmp_snooping: 0                                                              
        igmp_v3: 0
Port 0:       
        mib: ???          
        enable_eee: ???
        igmp_snooping: 0
        vlan_prio: 0
        pvid: 0   
        link: port:0 link:up speed:1000baseT full-duplex 
Port 1:
        mib: ???     
        enable_eee: 0                                                                 
        igmp_snooping: 0                                                              
        vlan_prio: 0                                                                  
        pvid: 1                                                                       
        link: port:1 link:down                                                        
Port 2:                                                                               
        mib: ???   
        enable_eee: 0
        igmp_snooping: 0                                                              
        vlan_prio: 0    
        pvid: 1      
        link: port:2 link:up speed:1000baseT full-duplex txflow rxflow auto 
Port 3:                                                                                                                                                                     
        mib: ???                                                                                                                                                            
        enable_eee: 0                                                                 
        igmp_snooping: 0                                                              
        vlan_prio: 0                                                                  
        pvid: 1                    
        link: port:3 link:up speed:1000baseT full-duplex txflow rxflow auto
Port 4:         
        mib: ???                         
        enable_eee: 0
        igmp_snooping: 0
        vlan_prio: 0               
        pvid: 1           
        link: port:4 link:down
Port 5:                    
        mib: ???              
        enable_eee: 0        
        igmp_snooping: 0 
        vlan_prio: 0                                                                  
        pvid: 2              
        link: port:5 link:up speed:1000baseT full-duplex txflow rxflow auto           
Port 6:                      
        mib: ???             
        enable_eee: ???      
        igmp_snooping: 0     
        vlan_prio: 0         
        pvid: 0                            
        link: port:6 link:up speed:1000baseT full-duplex                              
VLAN 1:           
        vid: 1
        ports: 1 2 3 4 6t 
VLAN 2:                
        vid: 2          
        ports: 0t 5
4

Better way to do blockquotes? Select all and using the button resulted in the output being mangled

5

No, better is preformatted text (</>). Edit the post above, remove the blockquotes and encapsulate it in preformatted.

6

Link looks down on ports 1 and 4. 0 and 6 are CPUs and 5 is the wan.
Was there anything connected there the moment you run the command?

7

Yes, work laptop on Port 4. NIC is enabled on the laptop

8

With the same cable if you connect on ports 2 and 3 the work laptop it is working fine?

9

You know, I swore I had checked the cables a month or so ago. I guess it's what I deserve for using cheaper grey cables for everything. All ports work on the "other" grey cable. Sorry for the goose chase trendy.

Quick question: I tried reading the forum thread about R7800 tuning but didn't find what I thought was a definitive answer. Are these still recommended?:

[https://openwrt.org/toh/netgear/r7800#tuning](R7800 Tuning)

10

I thought I better double check :smiley:

I don't own the specific router, so maybe you should look into threads for this device or start a new one.

11

No problem, thanks again

1 Like
12

This topic was automatically closed 10 days after the last reply. New replies are no longer allowed.