Questions tagged [route]

For questions about routes in relation to configurations on network equipment. For instance, you are troubleshooting why your static routes are not working properly.

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What are the ways I could connect about 5 computers in a network which does not require internet access? [closed]

Suppose I need to connect 5 computers to play a multiplayer game. However, I don't need internet access. What are the different ways I could do so? One way I thought was to connect all 5 to a switch. ...
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OSPF routes are not advertised

routers with ASBR2 connecting to AREA 0 and 10 and ASBR1 connecting to area 0 and 20, there's no entry of routes in R1's routing table, help me out R1#sh run Building configuration... Current ...
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Difference between default routes

In my routing table (ip route show command), I've got the following entries: 0.0.0.0/1 via 10.8.3.1 dev tun0 default via 192.168.1.1 dev wlan0 What is the difference between 0.0.0.0 and default? All ...
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How to redirect traffic when one site goes down without downtime and the subnets are different?

We have a uniform high availability configuration [somewhat like 1] with the difference we have two different subnets, vlan and vsphere for two different sites, X and Y. The host in site X has ip 10....
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CCNA | Routing Protocols | Administrative Distance

Can you tell what routing protocol was used to discover route by examining the adminsitrative distance on said route?
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How could far hop's RTT be smaller than a near hop's RTT in traceroute output? [duplicate]

According to here: ...the round trip time (RTT) for your packet to reach that point and return to your computer. And in the example, it shows: The RTT for hop 5 is smaller than hop 4. But RTT_4 = ...
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Does a Transparent Firewall need a Default gateway if directly connected to a layer 3 device that is actively performing routing?

Good folks of the Network Engineering stack! I have a question that I assume most people could answer in their sleep. To better illustrate my question, I've provided a sketch of my network below. In ...
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Longest Prefix Matching

I just learnt about this concept and I have a query which was also asked by someone earlier but was grossly misinterpreted. Suppose my Router has Routes for Networks: 192.168.22.0/23 and 192.168.22.0/...
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Juniper "show route receive-protocol bgp" output meaning

When you show the received route from a specific neighbor in BGP with a Juniper, the output is the following : show route receive-protocol bgp X.X.X.X inet.0: V destinations, W routes (X active,...
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How is an IP packet sent to the gateway?

This is some route command output sample: $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.240.1 0.0.0.0 ...
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Understanding BGP communities

Lets take this basic topology: RTR A ---- RTR B Routers A and B have an eBGP connection. At router B we can have a route map saying: match: community-list xyz action: permit/deny etc Questions: How ...
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What are the ways to force all network traffic to pass through a device?

I would like to know if it's possible to redirect all network traffic to a device (it can be Firewall or Transparent Proxy). My lab has the image layout (Physical Connection), how can I force all ...
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I have set static routes on both routers, Why can't I ping between the loopback interfaces?

This is my test topology: R6---R7 the interface IP address I have configured on it, you can check in the snapshot. and in both routers I have configured the static route, in R6 10.0.0.22/32 out ...
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Is it only one Active route for a special destination?

When I read juniper document about show route: I show route IP: admin@MX480> show route 14.104.112.1 inet.0: 837234 destinations, 1784889 routes (832157 active, 0 holddown, 862249 hidden) + = ...
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What's the BGP route `active received accepted damped` status meaning?

when I use show bgp summary command in Juniper router: admin@LA-MX-RE0> show bgp summary Groups: 20 Peers: 20 Down peers: 3 Table Tot Paths Act Paths Suppressed History Damp State ...
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Routing infrastructure doubt. It is a functionally design this?

I have design the following network diagram, but I cannot figure out if it could cause some issue on the network: Some detail about the infrastructure: Network connect Ext rtr A, Int rtr B and C is ...
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Testing Secondary Static Route

I am in the middle of migrating to a new IP scheme. From 192.168.10.x/23 to 10.6.x.x/19. Our ISP handles layer 3 and we statically route from our L2/L3 Cisco 3750G switch stack to their L3 device. ...
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Show 'all' routes to a given prefix on Juniper Router

Forgive me if I'm not using the correct terminology here but I'm on a Juniper MX204 router, call it router A. I'm receiving full table from my ISP. I do a show route, i.e. show route 1.1.1.1 and I ...
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3 votes
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How does a router decide what route to forward a packet when routes come from different routing protocols?

I'm a little confused. I know how the best route makes it to the routing table, but what process does the router follow to choose a path to forward a packet if, for example, you have something like ...
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Why cant i reach the other network while i have added the routes and firewall rules to allow traffic? (Pfsense/USG200)

I have 2 networks, the current one and the new one. The current one is not configured by me and one big mess and contains heavily out dated hardware (especially servers). I want to be able to access ...
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What is route leaking?

I tried googling, but didn't find a good article explaining this. What roughly i understand it, advertising route from one vrf table to other. What type of routes (static, connected, dynamic routes) ...
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How to enable Inter-VLAN multicast traffic on a layer 3 Siemens RX1510 Network Switch using IGMP?

I have a single Layer 3 Siemens RX1510 network switch split into 4 separate VLANs on different subsets. Name | Gateway | Subnet VLAN1 | 198.97.100.123 | 255.255.255.0 VLAN2 |...
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ipv6: I can ping only 1 interface within same network even with static route

This is how I set up a static route. R1(conf): ipv6 route 2004:DB8:2233:23::/64 2001:DB8:1122:12::2 With this, I can ping to 2004:DB8:2233:23::2 (S2/2 on R2) but not to 2004:DB8:2233:23::3 (S2/2 on ...
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Find best route in route table using sorting [closed]

I am trying to implement a forwarding algorithm by myself with ARP, ICMP and the forwarding algorithms. Given the routing table: typedef struct route_table_entry { uint32_t prefix; uint32_t ...
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Why is this subnet config required by my vlan "snake topology"?

I must validate the bandwidth on all 8 ports of a switch. We intend to do this with a "snake" topology as described in this article: http://thenetworksherpa.com/test-throughput-alchemy-using-a-snake-...
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Strict source routing using my own scattered PCs/ routers

I would like to completely control my network transportation by defining the packages path. According to this I can't do it unless I have control over all the PCs/ routers in its way. Suppose, I can ...
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Is there a way to determine my network transportation to specific path?

How can I determine my network transportation to specific path. I would like to determine that my data packages will go through specific routers.
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ping works but tracert reaches the max hop [closed]

I have 4 guests in my VMware host, all of them work as expected; but if I use tracert to find out the route they take to reach the external site, all of them will reach the max 30 hops after the first ...
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Route Reflector not reflecting BGP-LU (Labelled Unicast) prefixes

I was reading about the Inter-AS MPLS VPN Option C from book ' MPLS in the SDN Era' . In it , the author establishes the BGP-LU peering between PEs and ASBRs and between RR and ASBR only.No BGP-LU ...
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How to ping router from L3 switch

I am stuck in that that switch can't ping router and router can't ping switch. How to fix that ? I tried so much variants but them didn't help me Actually router must do static routing, that i am ...
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3 votes
2 answers
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NAT VLANS with same IP subnets and same IP addresses

I want to do something very similar to NAT VLans with same IP sub-nets but it is dissimilar enough that I don't know how to apply it to my application. I did find NAT Overlapping but it places ...
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How can a IP under a VLAN communicate other VLAN's IP?

I have a network topology as below: I want to use the Server0 to manage(communicate) to 10.10.10.1-3. you know the 10.10.10.1-3 are vlan100's SVI. there have vlan 100 and vlan 501. IP programme: ...
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How can I config a route to cross VLAN?

I have a network topology like bellow: In the server A(left), I want to access the Server B(right). But in A there only two network interface, and they are all import, so I can not change any of them,...
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2 votes
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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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2 votes
1 answer
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Cisco ASA 5505- My subnet mask is different from Show Route

While I was troubleshooting a DNS issue on my 10.10.10.0/30 subnet, I noticed the Local (L) and Connected (C) has different values. I configured the 10.10.10.0 network to use 255.255.255.252 has the ...
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3 votes
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How a router know where to send a packet with the exit interface route command?

When configuring a Cisco router, a static route can be added using the following commands: ip route 192.0.2.128 255.255.255.128 192.0.2.48 ip route 192.0.2.128 255.255.255.128 f0/0 If I use the ...
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how to change a BGP path in juniper?

How to change the selected BGP route? I show the route 43.242.33.39, there shows 3 GBP paths. but I can not ping the ip(43.242.33.39). and can not traceroute it. how can I do with this?
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Does the Router running multi routing protocol progresses received the routes will store into the Forwarding table?

I have a question about the Router running multi routing protocol progresses. if the bellow snapshot R1 have EIGRP and OSPF progresses, if the EIGRP progress received the routes from R3, will it store ...
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1 answer
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Does gateway have a genmask?

The genmask column is for destination column in print from route, but the gateway column does not have a genmask column.
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3 answers
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How to understand the default gateway generally refers to the 0.0.0.0/0 route?

I am reading a document: The default gateway generally refers to the 0.0.0.0/0 route, which is used when there is no clear routing entry to a destination address. How to understand this sentence?
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Different Source and Destination IP to and from ISP [closed]

Could somebody tell me which model the ISP are using ? I have a leasedline WAN with following information. IP: XXX.XXX.XXX.123 Gateway: XXX.XXX.XXX.126 Subnet: 255.255.255.248 The problem is every ...
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How to flush route cache in fortigate

Is there something like route cache on fortigate like in linux? How can i clear this cache? I have some problems with OSPF, after adding or changing redistributed network. Foritgate show routes ...
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How does the function of one default gateway on a router communicate with two other routers?

So given a theoretical scenario assuming there are three routers. There is no internet in this case, just a local network for the sake of understanding. One router (A) is connected to the next (B), ...
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3 votes
2 answers
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BGP vs OSPF path selection with /24 vs /23`

would a network select /24 or /23 path with ospf or with BGP which one is preferred !!
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