I have a lab with 4 routers connected in a square formation. The two routers at the top of the "square" (R1 and R3) are not directly connected; they are connected through a Tunnel interface. I'm running EIGRP in this topology and everything works well. I have added an offset-list to the link between R2 and R4, in order to make traffic arriving at R3 or R1 use the tunnel rather than go to R2 or R4 first. Everything is working just fine.
What i'm confused by is this:
172.16.1.1 (Tunnel100), from 172.16.1.1, Send flag is 0x0
Composite metric is (3328/3072), route is External
Vector metric:
Minimum bandwidth is 1000000 Kbit
Total delay is 30 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1476
Hop count is 2
Originating router is 150.1.7.7
External data:
AS number of route is 0
External protocol is Static, external metric is 0
Administrator tag is 0 (0x00000000
155.1.13.3 (GigabitEthernet1.13), from 155.1.13.3, Send flag is 0x0
Composite metric is (3428/3172), route is External
Vector metric:
Minimum bandwidth is 1000000 Kbit
Total delay is 33 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 2
Originating router is 150.1.7.7
Where is the extra 3 microseconds of total delay coming from in the Gi1.13 received route? The delay and bandwidth have been manually adjusted to be equal across all interfaces. The route in question is a static route and is pointed at an interface, advertised from R2. This topology command is run from the perspective of R3. The composite metric is correct, but I can't ascertain why the total delay is 3 microseconds higher.
CSR1000V, 15.4(3)S
