Scopriamo la rete attraverso il CDP!

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Step #5: Recuperiamo le informazioni del terzo apparato

Rifacciamo le operazioni già viste in precedenza per recuperare le informazioni che ci servono.

Sempre dall’apparato cui siamo connessi in console, facciamo stavolta il telnet all’indirizzo dello switch SW-A

SW-C#telnet 192.168.0.254
Trying 192.168.0.254 ... Open

**********************************
*     NetworkingDraft.tech       *
*   (C) 2022 Dario Formicola     *
**********************************


User Access Verification

Password:
***************************************
* Lab #1                              *
* Scopriamo la rete attraverso il CDP *
* Nodo: SW-A                          *
***************************************

SW-A>en
Password:
SW-A#

e procediamo con i consueti comandi:

SW-A#sh ver
Cisco IOS Software, vios_l2 Software (vios_l2-ADVENTERPRISEK9-M), Version 15.2(CML_NIGHTLY_20190423)FLO_DSGS7, EARLY DEPLOYMENT DEVELOPMENT BUILD, synced to  V152_6_0_81_E
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2019 by Cisco Systems, Inc.
Compiled Tue 23-Apr-19 04:48 by mmen


<-- output omesso -->

Cisco IOSv () processor (revision 1.0) with 574709K/209920K bytes of memory.
Processor board ID 948KL3QHYZM
1 Virtual Ethernet interface
16 Gigabit Ethernet interfaces
SW-A#sh ip int bri
Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0     unassigned      YES unset  up                    up
GigabitEthernet0/1     unassigned      YES unset  down                  down
GigabitEthernet0/2     unassigned      YES unset  down                  down
GigabitEthernet0/3     unassigned      YES unset  down                  down
GigabitEthernet1/0     unassigned      YES unset  up                    up
GigabitEthernet1/1     unassigned      YES unset  up                    up
GigabitEthernet1/2     unassigned      YES unset  down                  down
GigabitEthernet1/3     unassigned      YES unset  down                  down
GigabitEthernet2/0     unassigned      YES unset  up                    up
GigabitEthernet2/1     unassigned      YES unset  down                  down
GigabitEthernet2/2     unassigned      YES unset  down                  down
GigabitEthernet2/3     unassigned      YES unset  down                  down
GigabitEthernet3/0     unassigned      YES unset  down                  down
GigabitEthernet3/1     unassigned      YES unset  down                  down
GigabitEthernet3/2     unassigned      YES unset  down                  down
GigabitEthernet3/3     unassigned      YES unset  down                  down
Vlan1                  192.168.0.254   YES NVRAM  up                    up
SW-A#sh ipv6 int bri
GigabitEthernet0/0     [up/up]
    unassigned
GigabitEthernet0/1     [down/down]
    unassigned
GigabitEthernet0/2     [down/down]
    unassigned
GigabitEthernet0/3     [down/down]
    unassigned
GigabitEthernet1/0     [up/up]
    unassigned
GigabitEthernet1/1     [up/up]
    unassigned
GigabitEthernet1/2     [down/down]
    unassigned
GigabitEthernet1/3     [down/down]
    unassigned
GigabitEthernet2/0     [up/up]
    unassigned
GigabitEthernet2/1     [down/down]
    unassigned
GigabitEthernet2/2     [down/down]
    unassigned
GigabitEthernet2/3     [down/down]
    unassigned
GigabitEthernet3/0     [down/down]
    unassigned
GigabitEthernet3/1     [down/down]
    unassigned
GigabitEthernet3/2     [down/down]
    unassigned
GigabitEthernet3/3     [down/down]
    unassigned
Vlan1                  [up/up]
    unassigned
SW-A#show vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/0, Gi0/1, Gi0/2, Gi0/3
                                                Gi1/0, Gi1/1, Gi1/2, Gi1/3
                                                Gi2/0, Gi2/1, Gi2/2, Gi2/3
                                                Gi3/0, Gi3/1, Gi3/2, Gi3/3
<-- output omesso -->
SW-A#show int desc
Interface                      Status         Protocol Description
Gi0/0                          up             up
Gi0/1                          down           down
Gi0/2                          down           down
Gi0/3                          down           down
Gi1/0                          up             up
Gi1/1                          up             up
Gi1/2                          down           down
Gi1/3                          down           down
Gi2/0                          up             up
Gi2/1                          down           down
Gi2/2                          down           down
Gi2/3                          down           down
Gi3/0                          down           down
Gi3/1                          down           down
Gi3/2                          down           down
Gi3/3                          down           down
Vl1                            up             up

Anche l’apparato SW-A è uno switch con IOS virtuale, con solo l’IP 192.168.0.254 configurato sotto la VLAN 1 che è anche l’unica VLAN configurata su tutte le 16 porte delle switch.

Procediamo nella verifica del CDP

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