Nortel Networks 4050 manual DNS Client Settings fields

Chapter 10 Configuring system settings 533

2Enter the DNS Client information in the applicable fields. Table 107 describes the DNS Client Settings fields.

Table 107 DNS Client Settings fields

Field	Description
Cache size	Specifies the maximum number of DNS entries contained
	in the local DNS cache. The range is 0–10000. The default
	is 1000.
Retransmit Interval	Specifies the interval for retransmitting a DNS query in
	seconds (s), minutes (m), or hours (h). If you do not specify
	a measurement unit, seconds is assumed. The default is 2
	(2 seconds).
Retransmit Counter	Specifies the maximum number of times a DNS query is
	retransmitted. The default is 3.
Max TTL	Specifies the maximum Time-to-live(TTL) value for entries
	in the DNS cache. After the TTL has expired, the entries
	are discarded. Specify the TTL in seconds (s), minutes (m),
	hours (h), or days (d). You can enter compound values (for
	example, 2h30m). If you do not specify a measurement
	unit, seconds is assumed. The default is 3h (3 hours).
Health Check	Specifies the interval for the Nortel SNAS 4050 to check
	the health of the DNS servers. At the specified interval, the
	Nortel SNAS 4050 performs a DNS query to each DNS
	server in the system configuration to determine its health
	status. Specify the interval in seconds (s), minutes (m), or
	hours (h). If you do not specify a measurement unit,
	seconds is assumed. The default is 10 (10 seconds).
Health Check Down Counter	Specifies the number of times a DNS server health check
	can time out before the Nortel SNAS 4050 determines the
	DNS server is down. The default is 2.
Health Check Up Counter	Specifies the number of times a DNS server health check
	returns a positive response before the Nortel SNAS 4050
	determines the DNS server is up. The default is 2.

3Click Apply on the toolbar to send the current changes to the Nortel

SNAS 4050. Click Commit on the toolbar to save the changes permanently.

Nortel Secure Network Access Switch 4050 User Guide