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.
51
questions
0
votes
2
answers
31
views
Hop 1 of the traceroute to Internet is not the gateway [closed]
I'm assigned to a public IP address from my organization. Here is my default route:
IP: 45.150.164.x
Gateway: 45.150.164.1
netmask: 255.255.255.0
And here is the result of traceroute 8.8.8.8 from my ...
- 9
0
votes
0
answers
17
views
PIM-DM forwarding state expiry timer
I've recently read rfc 3973 - PIM-DM and there are a lot of timers explained but I couldn't find any information on the forwarding state expiry timer.
(172.45.1.15, 239.1.1.11), 00:00:06/**00:02:53**, ...
- 139
0
votes
0
answers
25
views
Why Chassis MAC Address is used when advertising EVPN Type 5 routes
In case of EVPN Type 5 or IP Prefix routes advertisement why chassis MAC address or router MAC address is used in addition to VXLAN VNI?
I guess VXLAN VNI is working on same principle like MPLS VPN ...
- 1,078
0
votes
2
answers
51
views
Routing help - can ping device to router, but not device to router to device [duplicate]
for some reasons I don't want to go into (there is only one kind of router that can transmitt data throught that long internet cable)
I have to have 2 NATS here is a picture of my network diagram
I ...
0
votes
2
answers
48
views
What's the difference between host routes and network routes for layer 2 destination selection?
This problem usually occurs with servers, but the question itself is about network.
When I have a gateway with 10.1.1.1 and an interface with /24 network, the network routes are automatically ...
- 55
1
vote
2
answers
127
views
routing table What does this mean (brackets in routing table)?
Sorry I couldn't be clearer. I literally don't know the terminology for it. So not only can I not describe it, but I cannot google it either because I dont know the words for it.
See photo:
Help me ...
- 11
0
votes
1
answer
52
views
How do I make it take the floating route and not the main static route in this case?
In this topology I have configured the devices in this way:
R1:
Building configuration...
Current configuration : 916 bytes
!
version 15.1
no service timestamps log datetime msec
no service ...
- 111
0
votes
1
answer
47
views
Packet tracer help with routing between multiple company routers with vlans and wireless routers
Im still quite a novice to packet tracer (so im sorry if this has been answered) and I'm trying to ping both vlans at company1 router to both Lans at company2 router but for some reason when the ...
- 3
2
votes
1
answer
166
views
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 ...
- 61
0
votes
2
answers
214
views
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 ...
- 103
0
votes
2
answers
57
views
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....
- 3
1
vote
2
answers
63
views
CCNA | Routing Protocols | Administrative Distance
Can you tell what routing protocol was used to discover route by examining the adminsitrative distance on said route?
- 41
1
vote
1
answer
196
views
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 = ...
- 1,893
1
vote
1
answer
44
views
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 ...
- 13
1
vote
3
answers
176
views
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/...
- 11
4
votes
1
answer
3k
views
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,...
- 445
1
vote
5
answers
652
views
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 ...
- 147
0
votes
1
answer
118
views
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 ...
- 1,227
1
vote
2
answers
2k
views
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 ...
- 37
0
votes
2
answers
310
views
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 ...
- 1,737
0
votes
1
answer
53
views
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)
+ = ...
- 1,737
1
vote
1
answer
134
views
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 ...
- 1,737
1
vote
2
answers
70
views
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 ...
- 145
1
vote
3
answers
381
views
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.
...
- 681
1
vote
1
answer
245
views
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 ...
3
votes
3
answers
649
views
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 ...
- 33
0
votes
4
answers
854
views
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 ...
- 219
1
vote
1
answer
287
views
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) ...
- 677
0
votes
1
answer
856
views
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 |...
- 101
1
vote
1
answer
57
views
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 ...
- 13
0
votes
1
answer
131
views
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 ...
- 101
0
votes
1
answer
408
views
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-...
- 103
0
votes
1
answer
29
views
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 ...
- 129
0
votes
1
answer
42
views
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.
- 129
0
votes
1
answer
86
views
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 ...
- 101
4
votes
2
answers
510
views
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 ...
- 1,078
0
votes
2
answers
262
views
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 ...
- 103
3
votes
2
answers
3k
views
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 ...
- 39
0
votes
2
answers
155
views
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:
...
- 1,737
4
votes
1
answer
247
views
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,...
- 1,737
2
votes
2
answers
1k
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 ...
- 21
2
votes
1
answer
128
views
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 ...
- 21
3
votes
1
answer
1k
views
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 ...
- 871
0
votes
1
answer
397
views
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?
- 1,737
1
vote
1
answer
92
views
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 ...
- 803
1
vote
1
answer
60
views
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.
- 113
2
votes
3
answers
920
views
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?
- 533
1
vote
0
answers
132
views
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 ...
- 11
5
votes
2
answers
16k
views
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 ...
- 71
1
vote
3
answers
192
views
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), ...
- 13