There is mounting concern in Government that the United Nation's peacekeeping operation in southern Lebanon may not have its mandate renewed in August.
Ireland has participated in the UN Interim Force in Lebanon (UNIFIL) since 1978.
Ireland has an unbroken record with UNIFIL and currently has more than 340 troops stationed in southern Lebanon.
Tánaiste and Minister for Foreign Affairs Simon Harris has begun to contact other EU member states about the issue.
He is due to raise it again when he travels to Brussels on Monday for a Foreign Affairs Council meeting.
"I was pleased as Tánaiste and Minister for Defence to secure Cabinet approval for the renewal of mandate for the UNIFIL mission last month," Mr Harris told RTÉ News.
He added: "This is a vital mission for security in the Middle East; and it's one that Irish peacekeepers have been involved in since 1978.
"This is an unbroken peacekeeping mission of which we are very proud of. It’s a mission that has saved lives and put peace into the heart of communities of Southern Lebanon.
"Peace is what matters here; And we want to see it restored."
Mr Harris said that the "ongoing hostilities between Israel and Iran are deeply worrying".
"De-escalation and dialogue represent the only pathway forward. The UNIFIL mission is vital to ensuring this objective.
"I will engage with my fellow foreign affairs ministers in Europe and beyond to ensure that we deliver what UNIFIL is all about: ensuring peace," he added.
The UN will review UNIFIL in August, amid concerns that the United States could withdraw financial backing for the operation.
Israel has also been highly critical of the force.
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The Tánaiste has already discussed options relating to the future of UNIFIL with the Chief of Staff of the Defence Forces Lt Gen Rossa Mulcahy.
It is understood Mr Harris will seek to impress upon his EU counterparts on the absolute need for the mission to continue, in order to ensure stability and peace in the region.
It is expected that France will lead the campaign to extend UNIFIL's mandate when it comes to a vote in August.
On 28 August last year, the UN Security Council unanimously passed resolution 2749 extending UNIFIL's mission for 12 months.
However, the upcoming talks will be the first since the cessation of hostilities between Hezbollah, which has a strong base in southern Lebanon, and Israel.
It is also expected that the Lebanese government will strongly support the renewal of the mandate.
The Cabinet backed the Irish Defence Forces' continued participation in UNIFIL last month.
In New York, Israel is said to be lobbying at the UN headquarters for a downgrade of the role of UNIFIL.
The Trump administration is viewed as being sympathetic to that argument, but it is currently unclear what position it will adopt in August.
Last month, Irish soldiers who are serving as peacekeepers in southern Lebanon came under fire near Israel's blueline, while on a joint patrol with the Lebanese Armed Forces.
The UNIFIL Force Commander conveyed the Government's anger and concern at the shooting incident directly to the Israel Defence Forces (IDF).
Mr Harris condemned the incident at the time and said it was an "utterly inappropriate, utterly unacceptable" attack on Irish peacekeeping troops in southern Lebanon.
"This is the latest in a range of what I view as intimidatory behaviour by the IDF [Israel Defence Forces] towards peacekeepers, or as we saw recently, Irish diplomats too. So this is not acceptable," Mr Harris said.
The incident took place close to the village of Yaroun and the patrol withdrew from the area when it occurred.
No injuries to personnel on the patrol were reported and no damage reported to the armoured vehicles they were operating from.
The location was roughly 10km from the main Irish military base in Lebanon, known as 2-45 or Camp Shamrock. It was also 5km from an Irish base on the Blue Line, called 6-52.
Also last month, UNIFIL reported that direct fire from the Israeli army had hit the perimeter of one of its peacekeeping positions in south Lebanon.
