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F5 301b - LTM Specialist: Maintain & Troubleshoot

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Total 209 questions

Which command will identify the active LTM device currently handling client traffic?

A.

b ha table show

B.

tmsh list /sys ha-status

C.

tmsh show /cm traffic-group

D.

tmsh run /sys failover standby

E.

tmsh show /sys ha-status all-properties

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

Users receive an error when attempting to connect to the website https://website.com. The website has a DNS record of 195.56.67.90. The upstream ISP has confirmed that there is nothing wrong with the routing between the user and the LTM device.

The following tcpdump outputs have been captured:

External Vlan, filtered on IP 168.210.232.5

00:25:07.598519 IP 168.210.232.5.33159 > 195.56.67.90.https: S 1920647964:1920647964(0) win 8192

00:25:07.598537 IP 195.56.67.90.https > 168.210.232.5.33159: S 2690691360:2690691360(0) ack 1920647965 win 4350

00:25:07.598851 IP 168.210.232.5.33160 > 195.56.67.90.https: S 2763858764:2763858764(0) win 8192

00:25:07.598858 IP 195.56.67.90.https > 168.210.232.5.33160: S 1905576176:1905576176(0) ack 2763858765 win 4350

Internal Vlan, filtered on IP 168.210.232.5

00:31:46.171124 IP 168.210.232.5.33202 > 192.168.100.20.http: S 2389057240:2389057240(0) win 4380

What is the problem?

A.

The filters on the tcpdumps are incorrect.

B.

The DNS entry for website.com is incorrect.

C.

The virtual server 'WEBSERVICES1' is listening on the incorrect port.

D.

The firewall is dropping the connection coming from the pool members returned to the client.

E.

The subnet masks of the pool members of pool WebServices1 and the f5 'Internal' Vlan are incorrect.

An application is configured on an LTM device:

Virtual server: 10.0.0.1:80 (VLAN vlan301)

SNAT IP: 10.0.0.1

Pool members: 10.0.1.1:8080, 10.0.1.2:8080, 10.0.1.3:8080 (VLAN vlan302)

Which packet capture should the LTM Specialist perform on the LTM device command line interface to capture only server traffic specifically for this application?

A.

tcpdump -ni 0.0:nnn -s 0 'host 10.0.0.1' -w /var/tmp/trace.cap

B.

tcpdump -ni vlan301 -s 0 'port 80 and host 10.0.0.1' -w /var/tmp/trace.cap

C.

tcpdump -ni vlan302 -s 0 'port 8080 and (host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3)' -w /var/tmp/trace.cap

D.

tcpdump -ni 0.0:nnn -s 0 '(port 80 and host 10.0.0.1) or (port 8080 and host 10.0.1.1 or host 10.0.1.2 or host 10.0.1.3)' -w /var/tmp/trace.cap

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

An administrator created a monitor to a pool member web server, which resulted in a pool member that is marked red. The administrator knows the web server is working when it is accessed from another computer.

What should the administrator do to correct the problem?

A.

Change the default gateway on the server.

B.

Create a SNAT in the LTM device configuration.

C.

Change the route to the client in the LTM configuration.

D.

Change the username and/or password on the monitor.

-- Exhibit –

-- Exhibit --

Refer to the exhibit.

An LTM Specialist configures a virtual server that balances HTTP connections to a pool of three application servers. Approximately one out of every three connections to the virtual server fails.

Which two actions will resolve the problem? (Choose two.)

A.

Assign a custom HTTP monitor to the pool.

B.

Enable SNAT automap on the virtual server.

C.

Verify that port lockdown is set to allow port 80.

D.

Verify the default gateway on the application servers.

E.

Increase the TCP timeout value in the default TCP profile.

An LTM Specialist is running the following packet capture on an LTM device:

ssldump -Aed -ni vlan301 'port 443'

Which two SSL record message details will the ssldump utility display by default? (Choose two.)

A.

HTTP Version

B.

User-Agent

C.

ClientHello

D.

ServerHello

E.

Issuer

Which two alerting capabilities can be enabled from within an application visibility reporting (AVR) analytics profile? (Choose two.)

A.

sFlow

B.

SNMP

C.

e-mail

D.

LCD panel alert

E.

high speed logging (HSL)

A OneConnect profile is applied to a virtual server. The LTM Specialist would like the client source IP addresses within the 10.10.10.0/25 range to reuse an existing server side connection.

Which OneConnect profile source mask should the LTM Specialist use?

A.

0.0.0.0

B.

255.255.255.0

C.

255.255.255.128

D.

255.255.255.224

E.

255.255.255.255

In which file would the LTM Specialist find virtual server configurations?

A.

bigip.conf

B.

bigip_sys.conf

C.

bigip_base.conf

D.

profile_base.conf

An LTM Specialist is troubleshooting an HTTP monitor. The pool member is accessible directly through a browser, but the HTTP monitor is marking the pool member as down.

GET / HTTP/1.1

HTTP/1.1 400 Bad Request

DatE. Tue, 23 Oct 2012 21:39:07 GTM

Server: Apache/2.2.22 (FreeBSD) PHP/5.4.4

mod_ssl/2.2.22 OpenSSL/0.9.8q DAV/2

Content-LengtH. 226

Connection: close

Content-TypE. text/html; charset=iso-8859-1

Which issue is the pool member having?

A.

The pool member has too many concurrent connections.

B.

The pool member is rejecting the request because it is invalid.

C.

The pool member lacks the object requested by the monitor.

D.

The pool member is NOT accepting requests from the LTM device IP address.