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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.

2
votes
The ICMP response is an entirely separate unicast message from a router to the original source used in the traceroute. The formation of the ICMP error packet is independent of the original traceroute …
answered Jul 7 '15 by generalnetworkerror
4
votes
2answers
If VRF is implemented for routing table separation such as having an overlay network for a guest network that doesn't mix with regular LAN routing, is migrating to it easily done on Cisco switches (4500 …
asked May 30 '13 by generalnetworkerror
7
votes
Without knowing much of your environment, you might want to look at Squid as a reverse proxy which can easily do what you seek. A reverse proxy is basically a load-balancer. No need to do anything o …
answered Jun 30 '13 by generalnetworkerror
4
votes
1answer
I have a branch office with a /27 assigned from ISP-A PA space configured with static routing. …
asked Dec 13 '15 by generalnetworkerror
3
votes
The /30 only provides two useable host addresses and your router and the ISP have consumed them. This net block is commonly known as the WAN block from your ISP and is used for just that link. For t …
answered Apr 16 '15 by generalnetworkerror
10
votes
3answers
I have two BGP routers for DIA with an issue with one provider in that the two links to this provider land on the same SP router. My ethernet handoffs via two separate MetroE links from another provi …
asked Jun 9 '13 by generalnetworkerror
1
vote
The OP's approach seems backwards to me or I am really misreading the question. I would never taken an approach that attempts to force the router to clear its cache to aid some external monitoring. …
answered Apr 12 '15 by generalnetworkerror
1
vote
The switch is going to ARP for that destination IP to get it's MAC address (which would also populate the CAM table with the response). The ARP request is broadcast to all ports. This requires the C …
answered Jul 13 '13 by generalnetworkerror
4
votes
7answers
Is it better to let a dynamic routing protocol (IGP) -- in this case OSPF -- run directly through or to the firewalls (and across the tunnels) or is OSPF over GRE (through the firewalls, but not to the … The IPSec VPN branch offices are small and don't currently run an IGP other than statics, so consider it a clean slate on what to do with branch office routing. …
asked May 29 '13 by generalnetworkerror
3
votes
There are many ways to restrict Layer 2 traffic between hosts. VLAN ACLs (VACLs) is one method. Private VLANs (PVLANs) is another and I'll leave that for others to provide examples. VLAN ACLs can b …
answered Apr 25 '15 by generalnetworkerror
10
votes
1answer
When designing an access layer, best practices today seem to indicate going toward a L3 design. I know the answers may be different depending on whether or not we're talking about a DC design or Ente …
asked May 30 '13 by generalnetworkerror
15
votes
2answers
SysAdmins often try to convince me that x86 general-purpose OS's can perform just as well as routers with low MHz CPUs and dedicated silicon (i.e., ASICs) at 1Gbps line rates. This thinking is carryin …
asked Nov 29 '14 by generalnetworkerror