The authorities in the Ethiopian region of Tigray say they will do everything possible to ensure the success of a ceasefire.
Ethiopia's government earlier announced an indefinite humanitarian truce in the country's civil war.
In a statement, the Tigrayan forces said they were committed to a pause in hostilities - as long as the government took "concrete steps" to allow aid into the region.
The fighting has left more than five million people needing food aid, but no deliveries have reached Tigray for months.
Both sides accuse each other of blocking supplies.