Conor Chaplin opened the scoring for the Tractor Boys, but Birmingham equalised in the closing minutes of the first half through Jordan James.
Jeremy Sarmiento put Town ahead, before Omari Hutchinson wrapped up the points in stoppage time.
The result means Ipswich are level on points with second-placed Leeds, but have an inferior goal difference.
Boss McKenna said: “It was a really good performance and I was pleased with all aspects of it.
“We were really good off the ball, aggressive against a good footballing team, and attacked well.
“It was an excellent performance and a really good day.
“I thought we started the game excellently and we didn’t let up too much in the first half. They tried to break the flow and I felt like the goal was coming.
Esta historia es de la edición February 25, 2024 de The Football League Paper.
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Esta historia es de la edición February 25, 2024 de The Football League Paper.
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AN Evatt described his 100th win as Bolton boss as very special, although he needed Aaron Collins' injurytime goal to bring up the three figures.
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NATHAN Lowe's strike inspired promotion-chasing Walsall to victory over AFC Wimbledon at the Cherry Red Records Stadium.
SUB GRIMES IS IN-SPIRED TO HEAD THE WINNER
CAPTAIN Jamie Grimes headed in a late winner for Chesterfield after a game of very few chances appeared destined to remain goalless.`
COBBLERS TEST IN TROPHY FOR POSH
HOLDERS Peterborough United have been drawn against fellow League One side Northampton Town in the Round of 32 of the newly-named Vertu Trophy.
HORNETS REMINDED OF GRAY'S BRILLIANCE
WAYNE Rooney expressed his delight as Plymouth extended their unbeaten league home run to six after Andre Gray's last-gasp leveller.
MARTI DOUBTING JOB AFTER DRAW
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BIG MAC'S ON TARGET TO SEE OFF THE TIGERS
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Rohl confident Owls
DANNY Rohl said getting results is the only thing missing as his Owls were held at home by Cardiff.
