Usa a rischio downgrade

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Cisco ASA Upgrade Guide

Book Title

Cisco ASA Upgrade Guide

Chapter Title

Downgrade the ASA

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Chapter: Downgrade the ASA

Downgrade the ASA

In many cases, you can downgrade your ASA software and restore a backup configuration from the previous software version. The method of downgrading depends on your ASA platform.

Guidelines and Limitations for Downgrading

See the following guidelines before downgrading:

There is no official Zero Downtime Downgrade support for clustering. However, in some cases, Zero Downtime Downgrading will work. See the following known issues for downgrading; note that there may be other issues that require you to reload your cluster units, thus causing downtime.

Downgrade to a pre-9.9(1) release with clustering—9.9(1) and later includes an improvement in the backup distribution. If you have 3 or more units in the cluster, you must perform the following steps:

Remove all secondary units from the cluster (so the cluster consists only of the primary unit).

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Downgrade 1 secondary unit, and rejoin it to the cluster.

Disable clustering on the primary unit; downgrade it, and rejoin the cluster.

Downgrade the remaining secondary units, and join them back to the cluster, one at a time.

Downgrade to a pre-9.9(1) release when you enable cluster site redundancy—You should disable site redundancy if you want to downgrade (or if you want to add a pre-9.9(1) unit to a cluster). Otherwise, you will see side effects, for example, dummy forwarding flows on the unit running the old version.

Downgrade from 9.8(1) with clustering and crypto-map—There is no Zero Downtime Downgrade support when downgrading from 9.8(1) when you have a crypto-map configured. You should clear the crypto-map configuration before downgrading, and then re-apply the configuration after the downgrade.

Downgrade from 9.8(1) with clustering unit health check set to .3 to .7 seconds—If you downgrade your ASA software after setting the hold time to .3 – .7 ( health-check holdtime ), this setting will revert to the default of 3 seconds because the new setting is unsupported.

Downgrade from 9.5(2) or later to 9.5(1) or earlier with clustering (CSCuv82933)—There is no Zero Downtime Downgrade support when downgrading from 9.5(2). You must reload all units at roughly the same time so that a new cluster is formed when the units come back online. If you wait to reload the units sequentially, then they will be unable to form a cluster.

Downgrade from 9.2(1) or later to 9.1 or earlier with clustering—Zero Downtime Downgrade is not supported.

Downgrade issue for the Firepower 2100 in Platform mode from 9.13/9.14 to 9.12 or earlier—For a Firepower 2100 with a fresh installation of 9.13 or 9.14 that you converted to Platform mode: If you downgrade to 9.12 or earlier, you will not be able to configure new interfaces or edit existing interfaces in FXOS (note that 9.12 and earlier only supports Platform mode). You either need to restore your version to 9.13 or later, or you need to clear your configuration using the FXOS erase configuration command. This problem does not occur if you originally upgraded to 9.13 or 9.14 from an earlier release; only fresh installations are affected, such as a new device or a re-imaged device. (CSCvr19755)

Downgrade from 9.10(1) for smart licensing—Due to changes in the smart agent, if you downgrade, you must re-register your device to the Cisco Smart Software Manager. The new smart agent uses an encrypted file, so you need to re-register to use an unencrypted file required by the old smart agent.

Downgrade to 9.5 and earlier with passwords using PBKDF2 (Password-Based Key Derivation Function 2) hash—Versions before 9.6 do not support PBKDF2 hashing. In 9.6(1), enable and username passwords longer than 32 characters use PBKDF2 hashing. In 9.7(1), new passwords of all lengths use PBKDF2 hashing (existing passwords continue to use MD5 hashing). If you downgrade, the enable password reverts to the default (which is blank). Usernames will not parse correctly, and the username commands will be removed. You must re-create your local users.

Downgrade from Version 9.5(2.200) for the ASAv—The ASAv does not retain the licensing registration state. You need to re-register with the license smart register idtoken id_token force command (for ASDM: see the Configuration > Device Management > Licensing > Smart Licensing page, and use the Force registration option); obtain the ID token from the Smart Software Manager.

Configuration migration might affect your ability to downgrade, so we recommend that you have a backup of your old configuration that you can use when you downgrade. In the case of upgrading to 8.3, a backup is automatically created (

    _startup_cfg.sav). Other migrations do not create back-ups. If your new configuration includes commands that are not available in the old version, you will see errors for those commands when the configuration loads; however, you can ignore the errors. See the upgrade guide for each version for details about each version’s configuration migration or deprecation.

VPN tunnels are replicated to the standby unit even if the standby unit is running a version of software that does not support the Ciphersuite that the original tunnel negotiated. This scenario occurs when downgrading. In this case, disconnect your VPN connection and reconnect.

Downgrade the Firepower 1000 or 2100 in Appliance Mode

You can downgrade the ASA software version by setting the ASA version to the old version, restoring the backup configuration to the startup configuration, and then reloading.

Before you begin

This procedure requires a backup configuration of the ASA before you upgraded, so you can restore the old configuration. If you do not restore the old configuration, you may have incompatible commands representing new or changed features. Any new commands will be rejected when you load the old software version.

Procedure

Load the old ASA software version using the upgrade procedure in Upgrade the Firepower 1000 and 2100 in Appliance Mode for standalone, failover, or clustering deployments. In this case, specify the old ASA version instead of a new version. Important: Do not reload the ASA yet.

At the ASA CLI, copy the backup ASA configuration to the startup configuration. For failover, perform this step on the active unit. This step replicates the command to the standby unit.

copy old_config_url startup-config

It’s important that you do not save the running configuration to the startup configuration using write memory ; this command will overwrite your backup configuration.

Example:

Choose Tools > System Reload .

Downgrade the Firepower 2100 in Platform Mode

You can downgrade the ASA software version by restoring the backup configuration to the startup configuration, setting the ASA version to the old version, and then reloading.

Before you begin

This procedure requires a backup configuration of the ASA before you upgraded, so you can restore the old configuration. If you do not restore the old configuration, you may have incompatible commands representing new or changed features. Any new commands will be rejected when you load the old software version.

Procedure

At the ASA CLI, copy the backup ASA configuration to the startup configuration. For failover, perform this step on the active unit. This step replicates the command to the standby unit.

copy old_config_url startup-config

It’s important that you do not save the running configuration to the startup configuration using write memory ; this command will overwrite your backup configuration.

Example:

In FXOS, use the Firepower Chassis Manager or FXOS CLI to use the old ASA software version using the upgrade procedure in Upgrade the Firepower 2100 in Platform Mode for standalone, failover, or clustering deployments. In this case, specify the old ASA version instead of a new version.

Downgrade the Firepower 4100/9300

You can downgrade the ASA software version by restoring the backup configuration to the startup configuration, setting the ASA version to the old version, and then reloading.

Before you begin

This procedure requires a backup configuration of the ASA before you upgraded, so you can restore the old configuration. If you do not restore the old configuration, you may have incompatible commands representing new or changed features. Any new commands will be rejected when you load the old software version.

Make sure the old ASA version is compatibile with the current FXOS version. If not, downgrade FXOS as the first step before you restore the old ASA configuration. Just make sure the downgraded FXOS is also compatible with the current ASA version (before you downgrade it). If you cannot achieve compatibility, we suggest you do not perform a downgrade.

Procedure

At the ASA CLI, copy the backup ASA configuration to the startup configuration. For failover or clustering, perform this step on the active/master unit. This step replicates the command to the standby/slave units.

copy old_config_url startup-config

It’s important that you do not save the running configuration to the startup configuration using write memory ; this command will overwrite your backup configuration.

Example:

In FXOS, use the Firepower Chassis Manager or FXOS CLI to use the old ASA software version using the upgrade procedure in Upgrade the ASA on the Firepower 4100/9300 for standalone, failover, or clustering deployments. In this case, specify the old ASA version instead of a new version.

If you are also downgrading FXOS, use the Firepower Chassis Manager or FXOS CLI to set the old FXOS software version to be the current version using the upgrade procedure in Upgrade the ASA on the Firepower 4100/9300 for standalone, failover, or clustering deployments.

Downgrade the ASA 5500-X or ISA 3000

The downgrade feature provides a shortcut for completing the following functions on ASA 5500-X and ISA 3000 models:

Clearing the boot image configuration ( clear configure boot ).

Setting the boot image to be the old image ( boot system ).

(Optional) Entering a new activation key ( activation-key ).

Saving the running configuration to startup ( write memory ). This sets the BOOT environment variable to the old image, so when you reload, the old image is loaded.

Copying the old configuration backup to the startup configuration ( copy old_config_url startup-config ).

Before you begin

This procedure requires a backup configuration of the ASA before you upgraded, so you can restore the old configuration.

Make sure the ASA FirePOWER module version, if installed, is compatible with the old ASA version. You cannot downgrade the FirePOWER module to an earlier major version.

Procedure

ASA CLI: ASA 5500-X models only: Downgrade the software and restore the old configuration.

downgrade [ /noconfirm ] old_image_url old_config_url [ activation-key old_key ]

Example:

The /noconfirm option downgrades without prompting. The image_url is the path to the old image on disk0, disk1, tftp, ftp, or smb. The old_config_url is the path to the saved, pre-migration configuration. If you need to revert to a pre-8.3 activation key, then you can enter the old activation key.

ASDM: Choose Tools > Downgrade Software .

The Downgrade Software dialog box appears.

For the ASA Image , click Select Image File .

The Browse File Locations dialog box appears.

Click one of the following radio buttons:

Remote Server —Choose ftp, smb, or http from the drop-down list, and type the path to the old image file.

Flash File System —Click Browse Flash to choose the old image file on the local flash file system.

For the Configuration , click Browse Flash to choose the pre-migration configuration file.

(Optional) In the Activation Key field, enter the old activation key if you need to revert to a pre-8.3 activation key.

Europa impostata al Ribasso, Usa a rischio downgrade

La debolezza del dollaro USD si manifesta soprattutto nei confronti dello yen: dopo aver rotto al ribasso il supporto posto a 97 il rischio è di un ritorno a 94.

&url=https://www.trend-online.com/cfd-trading/europa-impostata-ribasso/&via=qui_finanza” target=”_blank” onclick=”shtlck(this,event)”>

Dopo aver archiviato una seduta al ribasso a Wall Street, non aspettiamoci un quadro diverso stamattina in Europa, per quanto gli indici del Vecchio Continente si stiano comportando piuttosto bene considerando una situazione macro in miglioramento che dovrebbe essere confermata anche dal rialzo della produzione industriale tedesca di ottobre. Pur tuttavia, nonostante i timori crescenti circa la situazione politica negli Stati Uniti permane la convizione interiore che alla fine un accordo verrà trovato, anche a costo di mettere a rischio (come sta effettivamente accadendo) la reputazione internazionale degli Stati Uniti con Cina e Giappone che esprimono già le rispettive preoccupazioni circa l’attuale stallo politico e il valore dei loro investimenti. Certo è che, data la rigidità espressa da entrambe le parti, resta aperta la possibilità che l’accordo possa essere trovato solo dopo la scadenza del 17 ottobre, un evento in grado di aumentare ulteriormente l’incertezza del mercato nonchè di mettere a rischio la tripla A che gli Usa ormai conservano solo con Moody’s e Fitch. Oltre al baccano di sottofondo rappresentato dalle querelle politica, sullo sfondo riparte la stagione della pubblicazione dei risultati trimestrali da parte delle aziende quotate e , come sempre, si partirà dal produttore di alluminio Alcoa, considerato per più ragioni un vero e proprio indicatore di direzione. Sicuramente la stagione non parte sotto i migliori auspici, considerando che, diversamente dalle precedenti, le aspettative sono per un rallentamento degli utili. Qualora i timori si rivelino fondati, il focus degli investitori tornerà immediatamente sulle minute dell’ultima riunione della Fed e, per quanto siano ormai state superate dagli eventi, il tapering è spostato sempre più in là e assolutamente non prima di dicembre. Sul fronte valutario EURUSD bloccato in un canale laterale che offre l’opportunità di uscire a 1,3650 prima di ritornare a 1,3450 come la tendenza ribassista lascerebbe intendere; al contrario, per arrivare a 1,40 bisognerebbe otrepassare 1,3710. Upside limitato per la sterlina con il GBPUSD che passa al rialzo e torna a puntare a 1,6100; rafforzamento anche contro la moneta unica che potrebbe tornare a 0,8400. La debolezza del dollaro USD si manifesta soprattutto nei confronti dello yen: dopo aver rotto al ribasso il supporto posto a 97 il rischio è di un ritorno a 94.

Usa a rischio downgrade?

Per il presidente Barack Obama e per gli Stati Uniti si sta avvicinando lo stesso incubo dell’estate di due anni fa, quando soltanto a un giorno dal temuto default del 2 agosto, il Congresso raggiunse un accordo per innalzare il tetto del debito (“debt ceiling”). Cosa che non evitò il primo declassamento nella storia storia dei Treasuries da parte di S&P.

A differenza di due anni fa, ora i guai sono persino più grandi. Oltre che sul tetto del debito, l’accordo non si trova nemmeno sul nuovo bugdet federale, con quello vecchio in scadenza al 30 settembre. Il combinato del fallimento delle due trattative porterebbe a uno scenario da incubo. Tanto che il presidente ha alzato la voce e ha giudicato “irresponsabile che il Congresso minacci il default”.

Stando al segretario al Tesoro, Jack Lew, il governo avrebbe in cassa solo 30 miliardi di dollari al 17 di ottobre, data ultima per evitare il default, visto che successivamente non si potrebbero più onorare gli interessi sul debito. Spiccioli, se si pensa che spesso si arriva a una spesa governativa di 60 miliardi di dollari in un solo giorno. Lew ha invitato Repubblicani e Democratici a trovare un accordo entro il 30 settembre, data di scadenza per l’approvazione del nuovo budget.

Secondo gli analisti di Credit Suisse, a causa di entrate inferiori alle attese, la data ultima oltre la quale scatterebbe l’impossibilità di onorare il debito sarebbe il 24 di ottobre. In precedenza, lo stesso Tesoro americano aveva fissato a fine novembre la data ultima per evitare il default. Non cambia la sostanza. Da qui a tre settimane, gli USA potrebbero non essere più nelle condizioni di pagare gli interessi sul debito, sebbene per problemi tecnici.

Non solo. In assenza di un nuovo budget, dall’1 ottobre e per due settimane, il governo dovrebbe stoppare tutte le spese, tranne quelle essenziali, dando vita al cosiddetto “shutdown”. E secondo gli analisti, ciò potrebbe impattare negativamente sul pil dello 0,3%.

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