Routing

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Multicast - How a source joings a MC group?

I am a bit confused with Multicast. I know receivers that want to join a specific multicast group use IGMP to request to join to the group (lets say 239.4.1.1). My question is on the source side. Does the source also use IGMP to join the group? Or ho...

eBGP summary into OSPF

Hi, I'm after some advise. Currently I have x3 external routers providing WAN connectivity. All public prefixes are advertised to x3 ISP's via BGP, the providers are importing routes into. Internally everything is static routed. I've a preference to ...

Resolved! BGP default route into OSPF Area 0

Hello, Our Scenarios is two routers connected to ISP 1 and ISP2 both learning default route via BGP. We have further single router attached to each ISP 1 and ISP 2 accordingly and then these two routers are connected via P2P. The idea is to redistrib...

When configuring a router to be an RP-candidate for auto-RP in a sparse-dense mode network, do you need to statically configure itself to be the RP?

To configure a router to be an RP candidate, I originally thought that you would need to enter the "ip pim rp-address <interface ip>" command. But what if we're running the RP candidate on a network with sparse-dense mode? If we enter "ip pim rp-addr...

IPSEC VTI over MPLS

We are currently using IPsec VTI on our WAN links with our current service provider. However, we have to change service providers due to some reasons. The first test we did with the new service provider who uses MPLS was not successful. Could it be t...

DHCP when we have two vlans `

I have a question here regarding DHCP  R1 and R2 connected to a switch with vlan 10 and vlan 20 respectively and the switch is connected to a Router R3 in which i have configured DHCP with ip pool configured.  Now my question is how these two routers...

Resolved! OSPF

Q1: How Inter-Area routes are subject to routing loop in OSPF.  Q2:“IP ospf mtu ignore” What is the potential threat of this command .

OSPF

Howto avoid OSPF routing loops. When i google it then i come to know that "The loop avoidance is inherent in the SPF algorithm,which OSPF (as a link-state routing protocol) uses to calculate routes.This way, a tree is built for each router with itsel...

Unable to access particular website from ISR4331 Router

Hello Expersi am facing a weird problem, whereby i am not open only one site                                       . However, all other sites are working fine. we have not set any rule for blocking of any website. Any help would be greatly appreciate...

HSRP Group Limitation

DearsI am facing the below problem when I create more than 16 HSRP group on the Subinterfaceseach subinterface has its HSRP Group when I passed 16 HSRP group the below Message appear   % Warning: Interface MAC address filter only supports 15 addition...