Hot answers tagged

7 votes
Accepted

When would we use more than 1 dynamic routing protocol?

The administrative distance isn't about "trustworthiness", it's about preference - a combination of cost, delay, bandwidth, resilience, loss rate. External routing and internal routing ...
user avatar
  • 70.5k
4 votes

IPv6 subnets without delegated prefix

I have received an IPv6 network from my provider, say it's 2001:db8:1::/48. I did not get delegated prefix from them. That is the delegated prefix. I think you mean they did not assign a transit ...
user avatar
  • 93.5k
3 votes

RIP routes are not being advertised

You need to include the link addresses (172.33.x.x) in the rip network statements. Otherwise, RIP won't send advertisements out those interfaces.
user avatar
  • 62.5k
3 votes

Can a router provide DHCP to multiple subnets that are connected via switches?

Absolutely. Yes. In terms of Cisco brand routers, there is no maximum hard limit that I know of. If the DHCP server is on a remote subnet, you get the DHCP requests to the DHCP server via ip helper ...
user avatar
3 votes

Can a router provide DHCP to multiple subnets that are connected via switches?

Understand that the DHCP servers in routers are pretty crude, and a business should have a real DHCP server. In any case, you can configure multiple DHCP scopes on a router. If the networks to be ...
user avatar
  • 93.5k
3 votes

Setting an OSPF router in one area that doesn't see other areas

In most OSPF implementation you can filter routes advertised and received with route-map. So one option would be to assign a route map that allows nothing on the received-routes.
user avatar
  • 18.4k
2 votes

Why iBGP speaker should not modify next hop address?

The reason for this rule is loop prevention. If path attributes which affect the bestpath selection are modified during iBGP-to-iBGP route distribution, loop-free bestpath selection is not guaranteed....
user avatar
  • 5,182
2 votes
Accepted

Basic question on 'network history based routing tables'

So, I conclude using network history means the tables are dynamic? Yes, if you use a routing protocol to exchange routing information, but routes can be statically configured, and directly connected ...
user avatar
  • 93.5k
2 votes
Accepted

Routing VLANs to Firewall Ports

Your current topology is exactly as it should be. You don’t need layer 3 switch functions. You don’t add complexity just because it’s a waste of it’s power.
user avatar
  • 62.5k
2 votes

OSPF routes are not advertised

OSPF will not make up addresses, so the two network statements: network 172.16.10.0 0.0.0.0 area 0 network 172.31.10.0 0.0.0.0 area 0 are trying to use interfaces that do not exist on your router (...
user avatar
  • 93.5k
1 vote

When would we use more than 1 dynamic routing protocol?

Keep it simple stupid. The KISS principle. You only want to use what is necessary to achieve the desired outcome, anything more is called overengineering which leads to downtime and security ...
user avatar
1 vote

Can a router provide DHCP to multiple subnets that are connected via switches?

Alternately, deploy a layer 3 switch in place of switch6 and configure SVIs in the L3 switch with DHCP configuration. This scenario will be good practise when DHCP configuration has multiple subnets. ...
user avatar
1 vote

Can a router provide DHCP to multiple subnets that are connected via switches?

is it possible to have a router (as shown in the below diagram) provide DHCP leases to more than one subnet if the subnets are not directly attached? Yes, if you can use DHCP relay: ip helper-address ...
user avatar
  • 70.5k
1 vote
Accepted

VLAN and firewall interconnection

You haven't specified which kind of firewall you're using, so we can only provide general advice. You can either use a separate connection for each VLAN between the central switch and the firewall - ...
user avatar
  • 70.5k
1 vote

How do we discover hosts on another subnet without knowing their IP or MAC address

Presumably, if you want to send data to another device, you know something about that device: its name or address. If you only know the name, performing a DNS lookup will give you the address.
user avatar
  • 62.5k
1 vote

How do we discover hosts on another subnet without knowing their IP or MAC address

If I have a client who wishes to send a UDP packet to another client, how would I scan for his IP address if Client 2 is located in another subnet? There's no defined way to discover nodes on other ...
user avatar
  • 70.5k

Only top scored, non community-wiki answers of a minimum length are eligible