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Enterprise Core ENCOR 350-401 book errors and doubts

I am reading the new book, I would like to bring here doubts, errors or a simple exchange of ideas,

I start with the first error found

CHAPTER 2 SPT

page 43: The logic to calculate which ports should be blocked between two non-root switches is as
follows:


1. The interface is a designated port and must not be considered an RP.
2. The switch with the lower path cost to the root bridge forwards packets, and the one
with the higher path cost blocks. If they tie, they move on to the next step.
3. The system priority of the local switch is compared to the system priority of the
remote switch. The local port is moved to a blocking state if the remote system priority
is lower than that of the local switch. If they tie, they move on to the next step.
4. The system MAC address of the local switch is compared to the system priority of the
remote switch. The local designated port is moved to a blocking state if the remote
system MAC address is lower than that of the local switch. If the links are connected
to the same switch, they move on to the next step.


STEP 4 contains an error:

"The system MAC address of the local switch is compared to the system priority of the remote switch"

It should not be "The system MAC address of the local switch is compared to the system MAC address of the remote switch"

THX for reply

Giuseppe P
7 REPLIES 7
Highlighted

Page 50

 

Figure 2-4 Convergence with Direct Link Failure Between SW1 and SW2

 

Phase 1. SW1 detects a link failure on its Gi1/0/1 interface. SW2 detects a link failure on
its Gi1/0/3 interface.
Phase 2. Normally SW1 would generate a TCN flag out its root port, but it is the root
bridge, so it does not. SW1 would advertise a TCN if it were not the root
bridge.


SW2 removes its best BPDU received from SW1 on its Gi1/0/1 interface
because it is now in a down state. At this point, SW2 would attempt to send a
TCN toward the root switch to notify it of a topology change; however, its root
port is down.
Phase 3. SW1 advertises a configuration BPDU with the Topology Change flag out of all
its ports. This BPDU is then received and relayed to SW3. SW3 cannot relay this
to SW2 as its Gi1/0/2 port is still in a blocking state.
SW2 assumes that it is now the root bridge and advertises configuration BPDUs
with itself as the root bridge.
Phase 4. SW3 receives the configuration BPDU with the Topology Change flag from
SW1. SW3 reduces the MAC address age timer to the forward delay timer to
flush out older MAC entries. SW3 receives SW2’s inferior BPDUs and discards
them as it is still receiving superior BPDUs from SW1.

 

It should be :  Phase 1. SW1 detects a link failure on its Gi1/0/2 interface. SW2 detects a link failure on
its Gi1/0/1 interface.

 

Giuseppe P
Highlighted

Chapter 4: Multiple Spanning Tree Protocol - ERROR

 

Example 4-3 Brief Review of MST Status

 

*-> Error ! Spanning Tree information for Instance 0 (VLAN 30)

MST2

Spanning tree enabled protocol mstp

Root ID Priority 24578

Address 0062.ec9d.c500

This bridge is the root

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 24578 (priority 24576 sys-id-ext 2)

Address 0062.ec9d.c500

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

------------------- ---- --- --------- -------- --------------------------------

Gi1/0/2 Desg FWD 20000 128.2 P2p

Gi1/0/3 Desg FWD 20000 128.3 P2p

 

 

* It should be  Spanning Tree information for Instance 2 (VLAN 99 )

Giuseppe P
Highlighted

PAGE 133

 

CHAPTER 6

 

Figure 

Figure 6-7 EIGRP Unequal-Cost Load Balancing

 

The path from R1 to R3 via R1–R2–R3 has been assigned a path metric of 3328,

and the path via R1–R4–R3 has been assigned a path metric of 5632.

 

Correction The Figure 6-7 error in the figure in the path metric

 

 

 

 

 

 

Giuseppe P
Highlighted

CHAPETER 6 - Page 139

 

Example 6-11 shows the routing tables of R1. Notice that the static route across the serial

link is not installed into the RIB. Only the static route for the Ethernet link (10.13.1.0/24) with

an AD of 10 is installed into the RIB.

 

It should be 

Example 6-11 shows the routing tables of R1. Notice that the static route across the serial

link is not installed into the RIB. Only the static route for the Ethernet link (10.12.1.0/24) with

an AD of 10 is installed into the RIB.

Giuseppe P
Highlighted

Hi,

in which of the books are the errors

350-401 cisco enterprise network core or

350-401 ccnp and ccie enterprise core

Tnks.

Ciro Gustavo Mele.

 

Highlighted

350-401 ccnp and ccie enterprise core
Giuseppe P
Highlighted

Hi,

Thanks for your answer about Ccnp Core certification.

Ciro Gustavo Mele

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