Questions tagged [failover]

For questions about failover in a network aspect. For instance, if you have a stack of switches and you have problems with master/slave failover or a Firewall setup with multiple hot standby's where it doesn't failover correctly. Failover can also be used in relation to a network design.

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Best way to make a network failsafe?

I have a Debian based machine with 2 completely different network interfaces from 2 different ISPs acting as a backup for my server connection. These have two different IPs (Let's say IP1 and ...
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pfSense: Bundling carp VIPs

When configuring Carp for pfSense as recommended by their guide, this issue appears: when pulling out the WAN cable (simulating, say, a cable failure, switch port failure, or network card failure), ...
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1answer
47 views

eBGP failover without packet drops

I have core1 and core2 router peer with same ISP but distinct hardware and they are sending us default route. currently all in/out traffic going over to core1 and core2 is idle (standby), I have iBGP ...
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1answer
26 views

Is it possible management IP address of ASA don't move to the new active ASA when failover happen?

I created a failover configuration on two ASA5545s. I set up, for example, 10.10.10.1 on the management interface of the primary ASA and 10.10.10.2 on the secondary ASA. I know when a failoever happen,...
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57 views

OPNsense and IPv6

I've got two servers hosted at online.net. They give away 1 free /48 subnet per user and configure them using DUIDs. I'm using OPNsense as an VM (in combination with Proxmox) on each server to handle ...
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1answer
393 views

Cisco ASA failover monitor-interface policy

I have Cisco ASA 5585 and it has 10G interface in port channel where i configured multiple vlan sub-interface, is it worth to monitor every single sub-interface for failover policy or just monitor ...
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1answer
194 views

NAT and two internet providers, how to configure failover

Will you please help me to setup ISP2 as a failover internet provider. Configuration as follows: ip source-route ! ip cef ! no ip domain lookup no ipv6 cef ! multilink bundle-name authenticated ! ...
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1answer
49 views

Bonding and switching between 2 different Links/WANs/Interfaces

Before I ask anything, I'd like to say that I pretty much searched a lot (to what I know of from keywords and terms such as "bonding" "wans" "links" "failover" "aggregate") and I couldn't find any up ...
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2answers
209 views

How to know if ISP network have multiple routes

When it is time to choose an ISP in a remote area, I hope that the chosen ISP is having an acceptable redundancy in his network. Is there any way to verify all different route an ISP is having in his ...
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1answer
523 views

Virtual IP failover issue with vmware exsi ip based hashing

We are deploying HA database cluster on exsi which based on virtual IP concept for failover. if One node fail reserved VIP will be assigned to another node we have two exsi nodes and two virtual ...
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0answers
162 views

Cisco ASA: Windows DHCP doesn't bind IP address after failover change active [closed]

Equipment and soft: Two Cisco ASA 5540, ASA ver. 9.1(7)32, active/standby failover DHCP server: Windows server 2016 Anyconnect VPN clients get IP addresses from DHCP servers. Everything works ...
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1answer
44 views

one uplink, two routers for redundancy

Let's say i have two linux boxes, RouterA and RouterB, both with two NICs (eth0 and eth1). RouterA/eth0 is connected to an internet uplink. RouterA/eth1 and RouterB/eth1 are directly connected. What ...
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107 views

How to keep the VRRP failover mechanism?

referring to the diagram below, we have 2 VLAN's for voice, primary route for VLAN1 (red) is the left side, and VLAN2 (green) is the right. As it stands we have a nice easy setup, where VRRP kicks ...
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1answer
58 views

ISP Failover On A Converged Network

We have our fiber provider as our primary ISP. We have Comcast as our secondary ISP and our VoIP provider. We can setup the failover between the two ISPs. We also have 19 VoIP phones that are on a ...
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1answer
113 views

Network routing/WAN failover

Hi any one recommend me WAN Fail-over in Cisco 2811 router in virtual interfaces I already try this configuration. but its not working ip route 0.0.0.0 0.0.0.0 192.168.86.1 ip route 0.0.0.0 0.0.0....
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1answer
107 views

Setting up Hardware for HA

After designing this I went in to start configuring equipment and quickly realized I was missing alot of information/understanding. So the switches (A) between the modem and routers, do they need to ...
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1answer
224 views

AWS direct connect with Cisco ASA redendency

We have following scenario currently and BLUE link is active and running, now i am going to get second link for redendency which is right side of diagram. As you can see currently i have VLAN 9 (...
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2answers
1k views

High availability LAN segment with Cisco ISR4451X and 2 x Netgear GS724 - Port-channel vs. BDI vs. BVI?

I have a customer that is getting a new 1Gbps ISP connection and wants his servers connected across two switches for redundancy and protection from: failure of a router port failure of a network ...
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2answers
2k views

Cisco failover interface in waiting

I have following scenario, where i am getting 1G copper Cat6 cable from ISP and directly terminated on my Cisco ASA firewall on Gi0/8 interface and i have configured failover now my in failover output ...
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2answers
1k views

Multiple ISPs failover configuration

I'm going to be more explicit about this and hope you'll get me through I have two ISPs connected each one to a cisco ASA 5510.the two ASA are connected to a cisco switch 3650 that connects my LAN. I ...
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1answer
3k views

link-monitoring in fortigate

]3i am trying for a failover between two ISP interfaces using link-monitor in fortigate. both ISP links are vlan interface ( ie, not physical). and with my primary ISP, i have eBGP. i need to monitor ...
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1answer
52 views

Catalyst InterVLAN Routing w/ Failover ASAs

I currently have interVLAN routing configured on my Catalyst 3750. My gateway of last resort is my ASA firewall. The switch reaches the firewall through a layer 3 port. The port is configured as ...
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3answers
2k views

Cisco ASA vs Router or Both

I have found a lot of articles asking the same question on other sites but seems to be a lot of back and forth with no agreement. I am new to networking working with VIRL and trying to learn Cisco ...
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2answers
400 views

Set up Failover WAN with Double NAT (SonicWall)

I am trying to set up failover WAN on a SonicWall TZ300. My primary cable connection comes in via static IP (modem is bridged) to interface X1. My cellular backup is also a static IP to interface X2 (...
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2answers
416 views

EIGRP failover - how do i verify it happened?

I have 2 links to a destination and EIGRP was setup. The faster link is the successor and the slower link is the feasible successor. Switch1#show ip eigrp topology 192.168.1.0 EIGRP-IPv4 Topology ...
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2answers
1k views

Cisco 3825 Router - Dual WAN Failover?

My Cisco 3825, (ISR?) is running fine now, thanks to a lot of help. We've now gotten another WAN link from a different ISP for redundancy. What I need is to know how to configure the router to be ...
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1answer
2k views

ASA Redendent Failover and stateful link issue

We have ASA 5585-X and i create back-to-back (without intermediate switch/hub) two 1G cable between two ASA to create failover + stateful link using g0/6 and g0/7 interface. Interface config ! ...
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2answers
240 views

How do you account for unreliable ISPs?

I maintain internet for a small business in a third-world country, and I am forever struggling with unreliable service from our ISPs. Our current setup uses a Peplink Balance 580 for load balancing, ...
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1answer
391 views

c5915 DMVPN Spoke ISP Failover- Single Hub

I have a mobile application that utilizes cellular and satcom services to form a VPN connection to our hub. In the current configuration, failover works based on the ip hello-interval eigrp 1 15, ip ...
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1answer
279 views

Handling multiple redundant Metro Ethernet circuits in one location

We have recently signed up for Metro Ethernet for our main campus and 8 branches. It's a "mesh" with the carrier providing a virtual layer-2 switch in the cloud. I have a Cisco router at each site ...
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0answers
963 views

Dual ISP NAT Failover Not Working

I have a Cisco 1841 router with an HWIC-4ESW switchport module attached to it. Fa0/0 is connected to ISP1 and Fa0/1 to ISP2 and both are "ip nat outside", the switchports are in interface Vlan 1, ...
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1answer
1k views

IP SLA command not available, alternatives?

I have a Cisco router with two ISPs connected to it, and I wanted to configure a failover between them using an IP SLA, track for the IP SLA and two static routes (when the first route fails, the ...
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2answers
218 views

Failover with two ISPs, one with public and one with private addresses

I have the following setup: a small office network behind a Cisco 2900 series router. The network consists of about 20 devices - PCs, printers and switches. I have two ISPs that I want to configure ...
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1answer
3k views

ASA5550 manual failover question

We have two ASA5550 primary & secondary and they are pretty old running from since last couple year and we never bother to touch but recently we are doing some maintenance and found we need to ...
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1answer
76 views

Multhoming including incoming connections?

I am investingating the option of connecting our business network to 2 separate ISPs for redundancy. Since we have a couple of B2B services which need to be accessible from outside, in order to have ...
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4answers
2k views

Web server address with two ISPs

I am new to networking and I have the following problem. In the small company I work in we have a load balance router with two ISPs (only one ISP is connected at the moment) and to the router there is ...
2
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2answers
376 views

Lowest Possible Failover Latency

Let’s say I have two networking devices (either L2 switches, L3 switches, or routers), and the two devices have two ethernet connections between them: port 1 to port 1, and port 2 to port 2. If one of ...
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1answer
412 views

Layer 2 Failover

How can I setup a layer2 failover configuration? My Network setup: The distance between Site A and Site B is 2 km. Both sites are connected via a wireless link. As a backup line, we also have a ...
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1answer
173 views

Clustered Juniper devices using public DoD IP addresses for communication?

Ok, so I have to admit I am not an expert in how Juniper networked devices work, so this entire issue might be why I am having issues understanding something I am seeing on a pair of clustered SRX210H'...
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2answers
581 views

Cisco WAN failover without routing [closed]

I'd like to have my Cisco router failover from a primary WAN to a secondary WAN interface when the primary stops routing traffic. Neither WAN is running any routing protocol, these are residential-...
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1answer
197 views

Network failover from PTP Wirless to VPN

I have a ptp wireless network that spans 20 miles from one location to another. It works great. This is a critical network connection for us. I would like to have a vpn backup in case it should ever ...
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2answers
3k views

HSRP change priority didn't failover

I have HSRP running on two L3 switch and i change priority to higher but it didn't failover, why? SW1 interface Vlan30 description Internal_PrivateIP ip address 10.5.0.2 255.255.248.0 no ip ...
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1answer
133 views

Alternative solutions to using a dynamic DNS service to manage a failover ethernet/cellular device [closed]

We have RS232 sensors connected to a serial device server that manages both ethernet(primary)WAN and cellular(failover)WWAN connectivity. A database application requires a single IP to manage each ...
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1answer
599 views

VRRP dual ISP setup

I have a project which I'm struggling with and wondered if someone can offer some advise on the best way to achieve my goal (I'm new to Juniper). At the moment I have 2 juniper SRX240s, one connected ...
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2answers
2k views

how to setup dual ISP fail over with 2 routers

I have a project which i'm struggling with and wondered if someone can offer some advise on the best way to achieve my goal (i'm new to Juniper). At the moment I have 2 juniper srx240, one connected ...
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1answer
727 views

HSRP traffic flow asymmetric

I have asked following question related HSRP setup and here is the diagram and detail: HSRP issue both device active stats Question: I have cached on our cacti monitoring, traffic is flowing ...
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1answer
1k views

SonicWALL Load Balance Term

Currently I am learning about load balance method available on SonicWALL. I have some question regarding the load balance methods for 1) round robin 2) spill over 3) percentage. Assuming there are two ...
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1answer
2k views

Cisco ASA 5512 (OS 9.1(1)) HA failover issues

I have 2 cisco ASA 5512 units (security plus license) in an Active / Standby HA Failover cluster (I've tested both stateful and stateless failover unsuccessfully). Both units are connected (over a ...
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1answer
109 views

WAN failover when links stay up/up

If I have 2 possible outbound paths, 1 primary, 1 secondary, and I obviously need the secondary to come up if the primary fails. The problem I am foreseeing though, if the RF signal fails, the links ...
2
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1answer
9k views

Difference between cisco asa cluster and active/active failover

Whar are differences between cluster and active/active failover with cisco asa 5525-x?