Questions tagged [routing]

For questions about routing, the process of selecting to which network path traffic is sent. Consider using a more specific tag if your question is about a routing protocol like BGP or OSPF.

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110 views

Where is the traffic going?

Here is a routing puzzle: I'm working on a poorly documented network, and I'm trying to document things as I discover them. R1 is a core L3 switch. R2 is a router. The FW is a, well, firewall. On ...
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2answers
7k views

SonicWALL routing and L2 VLANs

We have a SonicWALL NSA 3500, x4 has 2 VLAN interfaces so x4:v300 and x4:v301. Each VLAN has an IP address: v300 is 192.168.100.1, and v301 is 192.168.101.1. I then have x4 connected to a layer-2-...
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418 views

Policy Based Routing (not matching packets) - Virtual Template

I have this configuration runnning : Larger image I tested the policy based routing int the lab using two linksys router acting as ppp clients of the Cisco 7206VXR and another linksys emulating the ...
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50 views

RPL: questions on routing mechanism

I'm studying RPL and two questions came to my mind: 1: Both in storing and non-storing modes, if a node wants to send a packet to another node via P2P communication paradigm, then how does the ...
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0answers
90 views

Ad hoc vs Mesh, which one to use?

Say we have four nodes (A, B, C, D) that are arranged in a chain-like topology. A <-------> B <-------> C <-------> D Only the adjacent nodes are in range of one another (A can ...
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0answers
66 views

Is this a valid OSPF topology?

In the following topology: every Backbone router is an ABR. Router 2 belongs to three different areas, area 0, area 1, and area 4. is this a valid topology for OSPF ? it works as expected and it ...
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0answers
121 views

OSPF behavior for redistribute routes

I have 2 equal cost path links between PeerA and PeerB and all its interfaces are participating in the same OSPF area. When i redistribute a static route (172.16.2.0/24) from PeerB to A, does the ...
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0answers
751 views

Enabling multipath in ns2 with no rtproto DV

So I am trying to run a simulation using the MPTCP protocol in a data center but rtProto DV is not working; produces an error, I am guessing the implementations doesn't have support for it and I can't ...
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0answers
406 views

Is there any way to view the current queue size for a BGP neighbor in the Bird routing daemon?

Using a Cisco or Juniper routers you can see the size of the output queue value by showing the bgp summary. This information is also available when showing the detailed neighbor information. e.g. ...
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0answers
552 views

How to force route for MIP in screenos, multiple ISP untrust

Scenairo: SSG140 in HA configuration. Four interfaces: LAN (trust) eth0/0 172.20.0.0./24 ISP1 (untrust) eth0/1 1.1.1.130/28 ISP2 (untrust) eth0/2 2.2.2.194/28 ISP3 (untrust) eth0/3 3.3.3.130/28 ...
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1answer
4k views

Why is routing not working on my Dell N2048 switch

I am in the process of replacing some older Dell Powerconnect switches with a some Dell N2048 switches. While doing this I wanted to go ahead and segregate certain areas of my network using VLANs. ...
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1answer
12k views

Vyatta static routing does not correctly route to next hop

I configured static route using Vyatta like following: set protocols static route 192.168.1.0/24 next-hop 10.100.0.204 But a packet which destination is 192.168.1.10 is not routed to 10.100.0.204. ...
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38 views

EIGRP Adjacency Table

From Cisco IP Routing by Alex Zinin According to this figure Adjacency Table gets messages from DUAL module also.As far as I know, Adjacency Table is populated only because of Hello packets exchanged ...
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31 views

How to get traffic to take BGP route if not matched in PBR?

I am a newbie to BGP and have an ASR1001x router (172.16.0.3), I'm forwarding an ACL to a second router (172.16.0.1) while I try to get BGP working on this one for a specific testing prefix-list ...
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0answers
29 views

IS-IS as a PE-CE routing protocol

In case of IS-IS as a PE-CE routing protocol for MPLS VPNs , when route is redistributed from BGP to IS-IS , does 'Down Bit' is also set to avoid routing loops?. Background Information We know that ...
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52 views

Colocation network setup - 2 switches with each 1 uplink - redundant configuration question

I have a question about the network configuration when connecting 2 switches in a colocation rack via 2 uplinks (1 uplink to each switch) to 2 other switches of the datacenter itself. My topology ...
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0answers
99 views

Cisco ISR Zone Based Firewall dual stack not matching returning traffic for ipv6

I have a bit of a problem with my Cisco 1921 ISR config. I have ipv4 (obviously) and also native ipv6 connectivity in my home lab. I am trying to set up the zone based firewall. With ipv4 traffic, the ...
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0answers
133 views

OSPF over IPIP tunnel doesn't work for CSR 1000v in AWS

I literally have the following topology shown in the figure below. I have 4 VPCs, each VPC has 3 subnets (1 for the VM instance and the other 2 for interfaces). Each VPC hosts a Cisco CSR 1000v in ...
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70 views

Fragment Table Overflow router cisco (strange Behavior)

I am getting this error message many times in my Router Cisco : %IP_VFR-4-FRAG_TABLE_OVERFLOW: Tunnel1: the fragment table has reached its maximum threshold 16 %IP_VFR-4-FRAG_TABLE_OVERFLOW: Tunnel1:...
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22 views

Are all Ant routing algorithms the same?

I am not really sure if this question is related to the Network SE or Artificial Intelligence SE. So, I asked it in both sites. Are all Ant routing algorithms the same? And if No, what is the common ...
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324 views

Even ips pinging but odd ips not pinging

We have following network, and i have multiple host connected to TOR switches configured with public IPs. We have HSRP running on vPC switches. interface Vlan100 description *** Public VLAN *** ...
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0answers
201 views

HP ProCurve 6120XG with Cisco configuration

ProCurve 6120XG Blade Switch with Cisco trunk I have c7000 HP blade Center with ProCurve 6120XG Blade Switch and i am creating trunk to my TOR1 Cisco switch (Nexus 3064), but having issue related VLAN ...
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464 views

Internal BGP routing issue BIRD

I am trying to setup BGP using BIRD and to announce routes learned from eBGP to router 2 through Router1. The routes show up in the routing table of Router2, however I cannot ping any of them.. (From ...
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194 views

OSPF NSSA - Type 7 LSA Metric Changes Unexpectedly

When a new path to an NSSA External (LSA type 7) route is brought up in the topology below, the existing path's cost to that route increments to exactly match the new path's cost. Therefore, both ...
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0answers
352 views

Logical-Tunnel Interface Juniper MX 480 doesn't “work”

I have configured a logical tunnel between my master-routing-instance and a additional routing-instance. I tested the same config (except IP addresses) on my lab-system and on one of our other core-...
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3answers
2k views

Juniper EX how to clear route forwarding table?

After layer 3 routing a large IPv6 assignment on an EX Juniper switch, the route forwarding table filled up and some entries corrupted or became otherwise invalid. We want to clear the whole table. ...
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0answers
66 views

Policy routing with IS-IS

three routers are connected where Router A connected to router B A (gig0/0/0 ip address 10.10.1.1)====> B(gig0/0/0 ip address 10.10.1.2 A(gig0/0/0=> ip address 10.11.1.1===>B(gig0/0/...
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0answers
213 views

OSPF question from ISP perspective

Was hoping for some advice regarding an OSPF solution for a customer. Basically the customer has about 4 sites. These would all be linked together physically. I have attached a basic network ...
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1answer
993 views

Sonicwall TZ105 Site to Site VPN Created can ping gateways but can't ping network from other site

Need help here Site B TZ105 x0 Lan 192.168.162.1 X1 WAN 64.x.x.x X2 LAN 10.0.3.1 Site A TZ300 X0 LAN 10.0.1.1 X1 WAN 69.x.x.x VPN tunnel set up as VPN SITE TO SITE and is Green From Site A I can ...
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2answers
319 views

IGP between 2 routers with an uncooperative router in the middle

I've got two routers, A and B. A gets some routes over BGP over a VPN connection, and has a leg on 10.0.0.0/24. It also can access the whole 10.0.0.0/16 via its default gateway. B is on 192.168.0.0/...
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0answers
146 views

VPLS interface on router switched to other interface on same router

I have a router, R1, that is serving as a default gateway on a network segment. Let's say port eth0 has an ip of 10.0.0.1/24 and is connected to a switch, S1. Another port on the router, eth1, is ...
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0answers
35 views

Unicast forwarding in RBVT-P routing protocol

As known, Road-based using Vehicular Traffic Proactive routing (RBVT-P) is an unicast algorithm whose uses CPs (Connectivity Packets) for route discovery The confusion here is that CPs are sent in ...
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0answers
26 views

The relation between street-aware routing in VANETs and V2V communication

As known, RIVER protocol is a geographic, V2V, street-based protocol which relies on anchor points (intersection points). How can it detect these anchor points without resorting to fixed ...
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0answers
798 views

Site-to-Site VPN: Can't ping between two routers through cloud

I'm trying to simulate a Site-to-Site VPN. This is what my network looks like: The VPN tunnel stands for connecting Technology center router to R1, the running configurations for Technology center ...
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0answers
106 views

Firewall/Router not translating correctly

I am currently having trouble gaining internet access from the PC. Any suggestions or advice would be most welcome :) In order to diagnose a much larger issue, I have scaled my lab configuration ...
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0answers
176 views

BFD support for OSPF vyatta 6.2?

Is it possible to get support for BFD for OSPF on vyatta 6.2? I cannot find any information about it on the internet. The only thing I've seen is that the support is available on Brocade Vyatta 5400 ...
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0answers
476 views

Unable to receive return packets on Azure IPSEC VPN Connection

Trying to get the VPN tunnel to Azure working on a Cisco ISR 1941 but have been unable to get any traffic flowing back from Azure to site. The tunnel looks to be up and a machine in Azure is ...
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0answers
348 views

ASA not following default route

I have the following network which splits a site into a Corp/DMz style network as best I can with the limitations of the ASA in packer tracer. Both routers have static routes to the 10.100.0.0 and 172....
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0answers
125 views

Juniper EX4200 Public Subnet Vlan Routing

We have a Juniper EX4200 which is connected via ge-0/0/0 trunk port to the providers router. We got our own vlan(id 250) and there are two public subnets routed on this vlan. Currently all our serves ...
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0answers
527 views

BGP transitive attributes for single ASN multiple prefixes multiple neighbors

I believe I'm on the right track, but have stumble across something with advertising BGP prefixes to neighbors. I am wonder how if I have a single ASN with multiple prefixes (99.1.1.0/24 and 111.1.1.0/...
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0answers
301 views

ip routing preference problem

On my Huawei CE12800 device, I am trying to run this config. Beside a standart BGP process, I am using three community values to control traffic with my upstream provider. With 555 community value, I ...
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0answers
52 views

Possible Network Plan? routed Subnets with www and Mail trunk

i mean the following is not possible.. We plan to create different Networks for Subareas with same Address-pools. With tricky Routing to use same IP-Settings on the Devices, there were moved around ...
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0answers
2k views

Dual Internet connections in active/standby mode without BGP

hello everyone attached is my diagram in which i am facing problem as you can see i have two internet links from two ISPs in which i want failover between two ISPs without using BGP or NAT because i ...
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0answers
112 views

Setting up WiFi with new Sonicwall across existing network

I am trying to set up a new WiFi AP in our HR building. There is a closet in the HR building, with a switch connected by fiber to our main network closet, then to another network closet where the ...
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0answers
324 views

wpa-aes EAP-peap authentication problem

I'm trying to connect ubiquity NanoStation M2 as Station/Router mode to a hotspot that I believe has WPA/AES security and EAP-PEAP for auth. I have tested the username and password from my laptop and ...
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2answers
275 views

Cisco 2960 not receiving dhcp from the router

I have a problem with Dhcp of some the Vlans. here is how my network is : I have a router ASR1001, which connects 15 switches(2960) as a ring topology. each switch has a subinterface of the router ...
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1answer
328 views

How can I tell which routing protocol a wifi mesh network is using?

Is there a way to determine it, maybe with some heuristic (sniffing)?
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0answers
9 views

Zywall USG 100 IPSec Routing

I own a Zywall USG 100, that manages 5 networks (2 WANs, 3 LANs); I built a site-to-site IPSec VPN with our CED, but now I'd like: to deny access to VPN from 2 of 3 above LANs, forcing them to reach ...
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0answers
23 views

HPE 3800 stack routing fails if a certain member is off line

We have a pair of stacked 3800's connected to a pair of stacked 2920's.  We have inter vlan routing enabled with a different subnet on the 2920's.  This has been up an running for about 3 years ...
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0answers
11 views

WatchGuard interface with secondary router holding WiFi splash page

I have a captive portal splash page I need to be presented to only 1 Open Wireless SSID on a WatchGuard AP controlled via the XTM330. The WatchGuard is not able to present the required splash page ...