4 votes

In a trace route, do routers that do not respond still forward the packets?

Answering ICMP requests sent to the router is a function typically performed by a router's management plane. Replying to ICMP (and at what rate) is optional. Forwarding packets is done by the ...
Teun Vink's user avatar
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2 votes
Accepted

Why MLS2 Doesn't Get ICMP Packet To Where It Should?

We're missing a bunch of output here, but here is a working theory: PC1 (which is in VLAN 10) has a default gateway of 10.10.0.11 (MLS1). Due to Per-VLAN Spanning Tree Protocol (PVSTP+) blocking the ...
Angelos Vassiliou's user avatar
2 votes
Accepted

Pinging packets greater than 1500 between two proper configured machines on proper configured networks, always possible?

is it true that with perfect MTU without DF we should be able to ping with any size? It should be. Assuming 1500 bytes standard MTU over Ethernet, using ping payloads greater than 1472 (8 bytes are ...
Zac67's user avatar
  • 84.4k
2 votes
Accepted

How to interpret traceroute results?

I know that it displays the RTT of hops. Not exactly. ping and traceroute display the round-trip time for ICMP echo request and ICMP TTL expired in transit alone. The difference to actually used ...
Zac67's user avatar
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1 vote
Accepted

Switch ping to router with trunk port

Your diagram is a bit unclear, but let's try. tagged VLAN 2 SVI=192.168.2.1 =trunk= Secondary IP=192.168.2.254 A secondary address on the router's native interface doesn't work. The router needs to ...
Zac67's user avatar
  • 84.4k
1 vote

How to interpret traceroute results?

Traceroute uses ICMP error messages as the TTL expires. Generating ICMP error messages is a low-priority task for a router, so you may have one hop that waits to send back an ICMP error, giving you a ...
Ron Maupin's user avatar
  • 99.6k

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