I have two routers. The routers are using EIGRP.   Primary is a Cisco 2921 Backup is 4321.
One is a primary and the Second is a backup.
When the primary router goes down all connectivity functions transfer to the Second router.
 
 
What I would like to know is this,
When the connectivity function transfer to the backup router And connectivity is restored to the Primary,
How do the Workstations, printers - ip address get transfer back to the Primary router. ??
 
 
Do all network devices stay on the backup until someone transfers them and if so, What is the commands
or process to bring them over to the Primary.

Note: This is all the  Detail I have.

Currently I have Spectrum modem / router . one port has DHCP enable with a dynamic public IP that is connected to a switch and all devices use that.

Anther port on the spectrum modem / router is connected directly to one computer that has a STATIC public IP and is working fine.

I want to use the Ubiquiti Unifi Security Gateway (USG) to be my router and have the specturm be just a Modem.

When I change the router/modem to be just a modem and connect it to the USG the regular network is fine, but that computer that has a static public IP can't get online .

Suggestions ?

in the topology above , I  configured on R3 area 1 as stub in the first LAB then configured the same area 1 as NSSA in the second LAB.
In matter of OSPF Routing table Stub or NSSA the effect is the same , both have made R2 and R1 unable to reach any interface of R3 and the other way around also is true.

In matter of LSDB there was difference,, NSSA has created LSA type 7 on R3 area 1  

***My question is what's the purpose of LSA 7 if OSPF routing tables gave the same results between  , when I configured area 1 as Stub then NSSA ?


the output below is when I configured area 1 NSSA on R3

R1#sh ip route ospf 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is not set

      2.0.0.0/32 is subnetted, 1 subnets
O        2.2.2.2 [110/2] via 192.168.12.2, 00:00:45, FastEthernet0/0
O IA  192.168.23.0/24 [110/2] via 192.168.12.2, 00:00:45, FastEthernet0/0
R1#

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R2#sh ip route ospf 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is not set

      1.0.0.0/32 is subnetted, 1 subnets
O        1.1.1.1 [110/2] via 192.168.12.1, 00:03:24, FastEthernet0/0
      11.0.0.0/24 is subnetted, 1 subnets
O E2     11.11.11.0 [110/20] via 192.168.12.1, 00:03:24, FastEthernet0/0
R2#

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R3#sh ip route ospf 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is not set

R3#
R3#

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Thank you

I have :

R1---R2---R3

OSPF is configured at the Global configuration level on all routers.

R1  has 2 loopbacks: loopback0 (1.1.1.1/24) and loopback1 (11.11.11.11/24)
R1 has interface fa0/0 (192.168.12.1) connected to R2

Router OSPF 1
Network 1.1.1.0 advertised into area 0
Network 192.168.12.0 into area 0

** 11.11.11.0 network is not advertised, it is redistributed

R2 has loopback 2.2.2.2/24
R2 has interface fa0/0(192.168.12.2) connected to R1
Network 2.2.2.0 advertised into area 0
network 192.168.12.0 avertised into area 0

R2  has also interface fa0/1(192.168.23.2) connected to R3
so R2 has advertised Network 192.168.23.0/24 into area 1

***Let 's not worry about R3 , since it has all its interfaces in area 1

Now on R1 : I have "redistribute connected subnets"
this has redistributed the prefix 11.11.11.0 into area 0

Well, when I check R1 ospf routing table there is no prefix 11.11.11.0 , it shows on its global routing table as directly connected.

on R2, the prefix 11.11.11.0/24 shows as E2.

My question now is why in R1 the prefix 11.11.11.0 is not showing as E2 ?

Sorry I have my topology and configuration in the Lab , this is why I cannot paste the topology and/or the configuration.

Any clarification will be very much appreciated.

Thank you.

When I browse a http site I got the following screen.
same is if I browse a https site but using the ad link in the browser instead of the direct link
I did a trace from the router (not from the computer) I got the following results see attached

On another computer on the network I do not have the issue, but have a wireless access point that does have the issue

I already did a ipconfig /flushdns

Please help
Trace.txt

I have a new Windows 10 Prof. PC that will not VPN into our office. All other computers, Windows 7, 10 and Apple can VPN in just fine. When the user tries to connect I comes back with a Can't connect to
The VPN connection between your computer and the VPN server could not be completed. The most comman cause for this failure is that at least one internet device (for example, a firewall or a router) between your computer and the VPN server is not configured to all Generic routing encapsulation (GRE) protocol packets.
The setting I tried and works on all other Windows 10 except this one is
Type of VPN: Auto and PPTP (works on other PCs)
Please advise thanks

What are the steps to add IP address DHCP MAC address reservations to a SonicWALL TZ 600 router?

Hi,

I have a small network with about 40 machines on and recently had a second internet connection added to the network for a certain set of users. These users have static IP addresses so I changed their default gateway from 254 (existing internet gateway ip) to .253 (new faster connection). Although this is working for the most part, the machines seem to have some issues access shares on the network and Ive had to resort to using local accounts of the network resources rather than the domain accounts since I get errors indicating there is no domain controller on the network to service the access request. When I change the gateway back to the previous setting, things start working again.

The DC is an SBS2011 box and its on 192.168.16.2 whilst the internet routers on .253 and .254 respectively. The clients are a mixture of Win 7/10.

Why would changing the gateway address have this effect and how can I get around it?

Ta
SycamoreIT

I manage I.T. for a small non-profit theatre company, and I am not particularly strong on networking. We have a single 100 mbs internet connection (Comcast) and support both wired ethernet and wireless access. Our boxoffice computers and a couple of administrative computers are connected to the network via ethernet. We also have actors and staff who connect various devices via wifi. The problem is this: the boxoffice computers are critical because if we can't sell tickets, we can't exist. But there are times (e.g., when rehearsals are over) when everyone jumps on their wireless devices and use all the bandwidth, so boxoffice and admin computers grind to a halt.So my question is: is there a way to place a limit on the amount of bandwidth available to the wireless routers (we have several access points across our campus) and maintain availability of bandwidth to the ethernet network? The people and devices accessing via wifi is constantly changing, so setting individual limits by IP is not practical. Any ideas would be appreciated.

I need to create a vpn from cisco router rv016 to home router. And at home any equipament can connect to the VPN and access the office. How can I do that ? What router I can use at home ?

Thanks

I have a  topology with 1 x Cisco WS-6509-E Layer 3 Switch connected to 1 x HPE FF 5700-40XG-2QSFP+ Switch and another HPE FF 5700-40XG-2QSFP+ Switch. These HPE FF 5700s are each connected to 2 x HP 5130-48G-PoE+-4SFP+ (370W) EI Switches and 1 x HP 5130-24G-4SFP+ EI Switch. The Cisco WS-6509-E has the udld aggressive command globally configured. I am trying to establish two connections running from each HP 5130 switch to each of the HP FF 5700s. I have the udld aggressive command configured globally on the Cisco WS-6509-E. On two of the HP 5130s I have the lldp compliance cdp command configured but on one I don't have it configured. When I try to make a dual connection from the switch running from the switch with lldp compliance cdp command configured, I get the link to one of the HP FF 5700 placed into err-diabled. The logs below show what happened:

Jul 15 11:08:28.682 PDT: %UDLD-SP-4-UDLD_PORT_DISABLED: UDLD disabled interface <port>, unidirectional link detected
Jul 15 11:08:28.682 PDT: %PM-SP-4-ERR_DISABLE: udld error detected on <port>, putting <port> in err-disable state
Jul 15 11:08:28.758 PDT: %PM-SPSTBY-4-ERR_DISABLE: udld error detected on <port>, putting <port> in err-disable state

Should I undo lldp compliance cdp command on the HP 5130 switches in order to get a dual connection to the HP FF 5700s?

Unable to ping a host directly connected to a port on an ASR901. Port has SVI configs and belongs to a bridge domain. Is their any specific commands to activate the port to allow ping? The port is showing connected but unable to ping to the host that is directly connected and vice versa.

on the topology above MPLS IP command is enabled on all physical interfaces of the routers. OSPF is configured on all physical and Loopback interfaces of the routers.
I would like to know if  IP packets from end to end get Tunneled through MPLS "Tunnel" ?


PE1#sh run | beg router ospf
router ospf 1
 log-adjacency-changes
 network 2.2.2.2 0.0.0.0 area 0
 network 192.168.23.0 0.0.0.255 area 0

interface FastEthernet0/1
 ip address 192.168.23.2 255.255.255.0
 mpls ip
 
P#sh run | beg router ospf
router ospf 1
 log-adjacency-changes
 network 0.0.0.0 255.255.255.255 area 0

interface FastEthernet0
interface FastEthernet0/0
 ip address 192.168.23.3 255.255.255.0
 mpls ip
 !
!
interface FastEthernet0/1
 ip address 192.168.34.4 255.255.255.0
 mpls ip

PE2#sh run | beg router ospf
router ospf 1
 log-adjacency-changes
 network 4.4.4.4 0.0.0.0 area 0
 network 192.168.34.0 0.0.0.255 area 0

interface FastEthernet0/0
 ip address 192.168.34.4 255.255.255.0
  mpls ip


PE1#traceroute 4.4.4.4 source loopback 0            

Type escape sequence to abort.
Tracing the route to 4.4.4.4

  1 192.168.23.3 [MPLS: Label 17 Exp 0] 48 msec 20 msec 20 msec
  2 192.168.34.4 44 msec 44 msec 20 msec
PE1#